Bathrooms
123 sources in the library on bathrooms. Each one says what the document covers and what it is good for. Name a source to see which document it is and where to read it. One at a time. Page 3 of 4.
- strong RN-KQW44R
BSI (British Standards Institution)
Part 3 of the BS 6465 sanitary installations series, the part on choosing and fitting the appliances rather than counting them. Published 31 Oct 2006 and withdrawn 26 Mar 2020, so cite it as historic good practice alongside the current Parts 1 and 2. It gives recommendations on the selection, installation and maintenance of the most commonly used sanitary and associated appliances in new and refurbished buildings, including hygiene, cleaning and maintenance of all sanitary installation units including electrical items, plus portable toilets used as supplementary facilities. It expressly does not deal with the detailed provisions of water supply, sanitary pipework or drainage, which sit in BS EN 12056 and Approved Document H. Its scope runs from private dwellings and care homes to workplaces, shops, schools and public toilets. Together with BS 6465-1 it superseded BS 6465-1:1994.
- strong RN-43IQ1S
BSI (British Standards Institution)
STATUS: WITHDRAWN on 25 February 2022. BS 7976-2:2002+A1:2013 was published 20 August 2002 and set out the method of operation for the pendulum tester used to assess slip resistance of pedestrian surfaces, that is how the pendulum test value (PTV) that every tile and flooring note quotes is actually obtained; part 1 covers the instrument specification and part 3 calibration. It excluded road and airfield surfaces, which are covered by BS EN 13036-4, and pendulum testing called up inside other product specifications. Because it is withdrawn, a note that says a bathroom or patio surface should achieve a PTV of 36 or more to BS 7976 is citing a withdrawn standard: the PTV thresholds themselves come from HSE and UK Slip Resistance Group guidance rather than from this standard, which is the more useful thing for a note to cite. Catalogue page confirms number, title, publication date, withdrawal date and scope.
- strong RN-445W51
BSI (British Standards Institution)
The accessibility code of practice that Approved Document M sits alongside. Paywalled, so only the catalogue page is public; it confirms BS 8300-2:2018, published 31 January 2018, status Current, and that it is part 2 of a two-part standard, with BS 8300-1:2018 (also published 31 January 2018, also Current) covering the external environment including parking, setting-down points, access routes and approaches to entrances. Part 2 covers external features affecting external access routes, and building interiors including entrances, reception facilities, horizontal and vertical movement and building facilities. Crucially for a home renovation note, the catalogue page states plainly that BS 8300-2 does NOT apply to individual dwellings; its residential scope is nursing, residential and care homes, student accommodation and the COMMON PARTS of blocks of flats. It also confirms the recommendations apply largely to new buildings but can be used to assess and improve existing ones, and that the extent to which they apply to listed and historic buildings is decided case by case.
- strong RN-P0GUEN
BSI (British Standards Institution)
The British Standard for rainwater harvesting, the reference a note on collecting and reusing rainwater needs. Published 31 Jan 2009 and withdrawn 19 Jul 2018, so cite it as the established code rather than a current one. Its scope gives recommendations on the design, installation, testing and maintenance of rainwater harvesting systems supplying non-potable water in the UK. It covers systems supplying water for domestic uses in residential, commercial, industrial or public premises that do not require potable water quality, and it names those uses explicitly as laundry, WC flushing and garden watering. That scope is the key point for a homeowner: harvested rainwater is fluid category 5 under the Water Supply (Water Fittings) Regulations 1999 and must not be connected to drinking or washing supplies, so the standard's non-potable limitation is a legal boundary as well as a design one.
- strong RN-PNVHFZ
BSI (British Standards Institution)
The product standard for domestic thermostatic mixing valves, the anti-scald device Approved Document G relies on for its 48 degrees C bath limit. Published 31 Aug 2017 and withdrawn on 25 Mar 2026, so cite it as the standard a valve was made to rather than as a live requirement. It specifies general construction, performance and material requirements for PN 10 thermostatic mixing valves and the test methods for verifying mixed water temperature performance at the point of use below 45 degrees C. It applies to valves on sanitary appliances in kitchens, washrooms and bathrooms, and covers a valve serving a single outlet or a small number of outlets in a domestic application, for example one valve controlling a shower, bath, basin and bidet; valves designed for a large number of outlets in institutional use are excluded. The page notes a suitable bathing temperature is body temperature of about 38 degrees C, and that children scald at lower temperatures than adults. Tests are laboratory type tests, not production quality control tests.
- strong RN-VKPEGH
BSI (British Standards Institution)
STATUS: CURRENT (marked Under Review). BS EN 12150-1:2015+A1:2019 was published 31 May 2019 and supersedes BS EN 12150-1:2015, which had itself replaced BS EN 12150-1:2000. It establishes tolerances, flatness, edgework, fragmentation and the physical and mechanical characteristics of monolithic flat thermally toughened soda lime silicate safety glass for use in buildings. Curved toughened glass is described in Annex A but is not part of the standard, and glass built into laminated or insulating glass units, or coated after toughening, falls under the relevant assembly product standard instead. Part 2 (BS EN 12150-2) covers evaluation of conformity. The catalogue page confirms number, title, date, status and scope; the test detail is paywalled.
- strong RN-XWFCEG
BSI (British Standards Institution)
STATUS: CURRENT, and it is a Designated Standard. BS EN 12380:2002 was published 17 December 2002, identical to EN 12380:2002, ISBN 0 580 40973 2, committee B/505, ICS 23.060.99 and 91.140.80. It specifies the requirements, test methods and evaluation of conformity for air admittance valves in drainage systems, the one way valves (often called by the trade name Durgo valve) that admit air to relieve negative pressure in a soil stack without letting foul air out, so a stack can be terminated internally rather than taken up through the roof. It is the standard to cite when a note explains that an AAV is acceptable for a new en suite or a relocated WC subject to Approved Document H, and that at least one stack on a drainage system must still be open to atmosphere. Catalogue page confirms number, title, date, status, ISBN, committee and scope; the tests are paywalled.
- strong RN-Y2B7CC
BSI (British Standards Institution)
STATUS: CURRENT. BS EN 13893:2002 was published 28 November 2002, is identical to EN 13893:2002, ISBN 0 580 40862 0, committee PRI/60, ICS 97.150. It specifies the method for measuring the dynamic coefficient of friction on DRY surfaces of resilient, laminate and textile floor coverings, and gives the DS classification that vinyl, laminate and carpet manufacturers declare. The key limitation for a note is in the title: it is a dry test, so a DS rating says nothing about wet slip performance in a bathroom or kitchen, where the relevant measure is the pendulum test value from the UK Slip Resistance Group method (formerly BS 7976-2, now withdrawn) or the ramp test classifications R9 to R13. Catalogue page confirms number, title, date, status, ISBN, committee and scope.
- strong RN-623IHB
BSI (British Standards Institution)
The product standard for shower enclosures and screens, the counterpart to BS EN 14527 for trays. Published 30 Nov 2018, current but under review. It specifies characteristics for shower enclosures for domestic purposes which ensure the product gives satisfactory performance when used as intended and installed in accordance with the manufacturer's installation instructions, with domestic purposes defined to include hotels, student accommodation, hospitals and similar buildings except where special medical provisions are required. Two exclusions are worth citing in a buying guide: it does not apply to shower cabinets or curtains, and it does not specify aesthetic or dimensional characteristics, so enclosure sizes are a manufacturer choice rather than standardised, which is why replacement glass rarely fits an existing frame from another brand.
- strong RN-QPG4FD
BSI (British Standards Institution)
The product standard behind every domestic wash basin sold in the UK. Published 31 Oct 2018, current but under review; identical to EN 14688:2015+A1:2018, ICS 91.140.70 Sanitary installations, committee B/505 (listed as B/503 on the page), ISBN 978 0 580 97776 3. It specifies functional characteristics and test methods for washbasins for domestic purposes, covering construction, performance and safety plus factory production control, with named test regimes for thermal shock, abrasion, scratch hardness, chemical resistance, mechanical loading and overflow capacity. Its definition of domestic purposes expressly extends to hotels, student accommodation and hospitals except where special medical provisions are required, so a note can state that a basin badged to EN 14688 has been type-tested rather than merely CE or UKCA marked.
- strong RN-C18H5B
BSI (British Standards Institution)
The general specification for ordinary taps, as opposed to the thermostatic mixing valves covered by BS EN 1111. Published 31 Jan 2009 and withdrawn 4 Jan 2024, so cite it for what a tap was made to rather than as a live requirement. It specifies the field of application for pillar taps, bib taps, and single and multi-hole combination taps for use in specified types of water supply system, and sets the dimensional, leak tightness, pressure resistance, hydraulic performance, mechanical strength, endurance and acoustic characteristics of the various tap types, together with the test methods to verify each. The acoustic characteristic is the one buyers rarely know exists and is the basis for noise class claims on taps.
- strong RN-28LGZP
BSI (British Standards Institution)
The requirements part of the three-part European standard for waste fittings, which is what a bath, basin, bidet, shower tray or sink waste is actually made to. Published 4 Sep 2002 and still current, identical to EN 274-1:2002, ICS 91.140.70, committee B/505, ISBN 0 580 40336 X. Its scope covers wastes, overflows and traps for baths, wash basins, bidets, showers and sinks, so it is the citable authority for waste and overflow assemblies and for trap types. Parts 2 and 3 of the same series carry the test methods and the quality control requirements.
- strong RN-05KG4M
BSI Group
What the Kitemark actually certifies, which matters because it is often confused with CE or UKCA marking and with BSI standards themselves. States that Kitemark certification confirms a product or service's claim has been independently and repeatedly tested by experts, so it is third-party certification of continued conformity rather than a manufacturer's own declaration. Records that the mark was originally known as the British Standard Mark and was first registered as a trademark in June 1903, giving it more than 120 years of use. Cites BSI's own consumer research that the Kitemark is recognised by 67 per cent of UK consumers, and that 70 per cent are more confident in products carrying it than in products that do not. Certification spans products, services and processes, including building information modelling and inclusive service certification, and BSI publishes a searchable Kitemark directory and a Verify a Certificate service for checking a specific certificate.
- strong RN-S7Q2D7
Chartered Institute of Plumbing and Heating Engineering
CIPHE guidance on what to do before a plumber arrives. For a burst pipe it gives the sequence: turn off the stop-valve on the incoming water supply main, often sited under the kitchen sink, or the external valve under a cover in the garden or path if there is no internal valve; if the water cannot be controlled, open all cold taps and flush the WC so pipework and storage drain quickly, but do not turn on hot taps; turn off the central heating, let a solid fuel boiler die out, switch off any electric immersion heater, then call a professional plumber. It explains that water in exposed and uninsulated pipework freezes and expands, splitting the pipe, and that a stray nail or screw during DIY is a frequent cause. For a frozen pipe it says to turn off the mains water at the internal stop valve first.
- strong RN-NMU95A
Chartered Institute of Plumbing and Heating Engineering
The CIPHE consumer hub on how plumbing and heating faults become health risks, grouped into burns and scalds, Legionnaires' disease, hot tubs and spa baths, carbon monoxide, lead poisoning, plumbing misconnections, Weil's disease (leptospirosis), landlord duties and advice after flooding. It states that a burn injury is for life and that most plumbing-related burn and scald injuries are avoidable, which is the professional-body backing for the 48 degree C bath limit in Approved Document G. It states that Legionnaires' disease is a type of pneumonia that can be deadly and that outbreaks can occur in all hot and cold water plumbing systems, and that use of lead has been banned since 1970 but lead remains in many homes. It says hundreds of thousands of UK properties have plumbing misconnections that pollute streams, rivers and beaches, which is the citation for checking where a new bathroom or utility waste actually discharges.
- strong RN-HBBEMM
Chartered Institute of Plumbing and Heating Engineering
The CIPHE's public verification tool for checking a plumbing or heating engineer's membership. A homeowner can search by membership number, which the tool recommends and says must be entered exactly as it appears on the engineer's CIPHE membership card, or alternatively by email address or phone number. This is the check to cite when a note tells a reader to confirm a plumber's professional credentials before engaging them, alongside the Gas Safe Register for gas work.
- strong RN-5XVQAQ
Electrical Safety First
States that sockets are not allowed in a bathroom or shower room, apart from shaver supply units, unless they can be fitted at least 2.5 m from the edge of a bath or shower tray. Shaver points are permitted within that 2.5 m provided they are SELV or conform to BS EN IEC 61558-2-5. Recommends a ceiling-mounted pull-cord switch in preference to a wall light switch because of dampness and wet hands. Confirms all circuits in or passing through bathrooms or shower rooms must be protected by an RCD. General guidance keeps outlets at least 30 cm from water or heat sources.
- strong RN-8WCI3J
NICEIC
Sets out how self-certification replaces a local authority building control application: a registered contractor does not notify the local authority in advance, but notifies the work online to NICEIC, which issues a building compliance certificate to the customer and tells the local authority the work took place, so building control charges are not payable by the consumer. Covers Building Regulations notification for gas, heating and hot water, ventilation, plumbing and microgeneration, with electrical-only contractors directed to the separate Domestic Installer Scheme. Scheme conditions state that contractors working in domestic dwellings must hold at least 2 million pounds of public liability insurance and must offer clients a warranty for completed work. Published fees are an initial application fee of 95 pounds plus assessment and certification of 595 pounds covering one to four units, with measures priced in units, for example heating or hot water systems 1 unit, sanitary convenience 2 units, solid fuel burning combustion appliance 2 units, and air source heat pumps 2 units.
- strong RN-6FMWAM
UKAS
The body that sits one level above every certification mark a product carries, and the answer to the question of who checks the checkers. UKAS states that it is the National Accreditation Body for the United Kingdom, appointed by government to assess and accredit organisations providing services including certification, testing, inspection, calibration, validation and verification. Its site carries a searchable directory of accredited organisations, an explanation of the difference between accreditation and certification, and an impartiality statement. This matters for the insulation and cladding clusters in particular: a performance claim tested at a UKAS accredited laboratory, or certified by a UKAS accredited certification body such as the BBA or WRAS, sits on a different footing from an in-house test result or a self-declared figure, and the directory lets that be checked rather than assumed.
- strong RN-X632BX
Water Regs UK
Water Regs UK's index of clause-by-clause guidance on the water fittings rules, organised by the regulation or byelaw number so a claim can be traced to its source. It covers notification of work to the water undertaker under Regulation 5 in England and Wales, Byelaw 5 in Scotland and Regulation 5 in Northern Ireland, showing that the three nations run parallel but separately numbered regimes; contractor's certificates under Regulation or Byelaw 6, which is the approved contractor self-certification route; products in contact with water under Schedule 2 paragraph 2; and the general requirements for water fittings under Schedule 2 paragraphs 3 and 4, which is where the requirement for a fitting to be of an appropriate quality and standard, or approved, sits. Further guidance covers pipework, system design and installation, backflow protection, cold water services, hot water systems and drinking water taps, each referenced to its Schedule 2 paragraph. Cite this for whether a particular job, such as a bidet, an outside tap or a new bathroom, is notifiable.
- strong RN-UQLSFV
Water Regulations Approval Scheme
The searchable directory of approved fittings and materials, organised by four-digit section number, which lets a reader check a specific product before buying. Sections include 0009 to 0046 backflow prevention devices, with the Schedule 2 Section 6.2 device types named in full: Type AB air gap with weir overflow, Type DC pipe interrupter with permanent atmosphere vent, Type BA verifiable reduced pressure zone valve, Type CA non-verifiable disconnector, Type EA verifiable single check valve giving Fluid Category 2 protection, Type EB non-verifiable single check valve for Fluid Category 2, and Types EC and ED double check valve assemblies giving Fluid Category 3 protection. Section 0120 cisterns storing water for domestic purposes references Schedule 2 paragraph 16(4) of the Water Supply (Water Fittings) Regulations 1999 for the essential items a cistern must include.
- strong RN-GTCR9U
Water Regulations Approval Scheme
Sets out that WRAS checks testing of water fittings for compliance with the Water Supply (Water Fittings) Regulations and the Scottish Byelaws, which impose a legal duty on everyone to use suitable water fittings when connected to a public water supply, covering pipes, fittings, taps, showers, washing machines, dishwashers, coffee machines, boilers and toilets. States plainly that a WRAS approval itself is not mandatory but the testing is, so the point of the approval is proof that the required material and mechanical tests were passed, including that a product will not affect the taste or smell of drinking water or promote microorganism growth. Every approved fitting carries requirement and installation notes stating conditions of use, for example cold water only. Non-compliant fittings may have to be replaced and can lead to prosecution and a fine; cites British insurers' data that a burst pipe repair claim in freezing weather costs on average 8,800 pounds.
- strong RN-X6VAC2
WaterRegsUK (Water Regs UK Limited, formerly WRAS)
The regulator-facing explainer on backflow protection in bathrooms, useful because it puts numbers on tap gaps. It confirms the water fittings regulations apply in England, Wales and Northern Ireland while Scotland is governed by byelaws, so a note can state the rule differs by nation. Bath and basin taps in domestic premises are typically a fluid category 3 risk and non-domestic a category 5 risk; a toilet is always fluid category 5, normally satisfied by a built-in Type AUK1 arrangement. The Type AUK2 tap gap table for fluid category 3 gives a minimum air gap of 20 mm for tap connections up to and including 15 mm, 25 mm for connections larger than 15 mm but smaller than 20 mm, and 70 mm for 20 mm or larger. For fluid category 5 the Type AUK3 gap is 20 mm or twice the internal diameter of the tap connection, whichever is greater, so a 25 mm tap needs 50 mm. Single flow mixer taps additionally need single check valves on both supplies.
- strong RN-UNPP5R
WaterRegsUK (Water Regulations Advisory Scheme)
The rules for feeding a WC or washing machine from harvested rainwater, greywater or a borehole, and the reason a direct connection is never permitted. An alternative supply must never be directly connected to the mains drinking water; the only compliant arrangement is a break tank with a Type AA unrestricted or Type AB weir spillover air gap, the mains supply pipe kept outside the tank, discharging at a higher level and maintaining a minimum clearance of twice the internal diameter of the supply pipework (2D) or 20 mm, whichever is the greater, with no contact between the tank water and the mains inlet. The regulators rate a Type AB air gap as suitable protection against both back siphonage and back pressure at the highest contamination risk, fluid category 5. Whatever fluid is being conveyed, all pipework above or below ground should be marked in accordance with the latest version of BS 1710, and servicing valves should be labelled. Type AB installations should be inspected, cleaned and maintained as necessary every 6 months, per BS EN 806-5. Where premises have both a mains supply and an alternative source such as rainwater, a borehole or recycled water, the owner must notify the water undertaker.
- strong RN-IIRGYX
WaterRegsUK (Water Regulations Advisory Scheme)
How a plumber avoids the 10 working day notification and what paperwork the householder should get instead. An approved contractor is a member of one of the four approved contractor schemes, voluntary schemes for plumbers established under regulation 1(2) of the Water Supply (Water Fittings) Regulations in England, Wales and Northern Ireland and byelaw 1(2) in Scotland. The four named schemes are the Water Industry Approved Plumbers' Scheme (WIAPS), which operates for 18 water undertakers, the Association of Plumbing and Heating Contractors, the Chartered Institute of Plumbing and Heating Engineering, and the Scottish and Northern Ireland Plumbing Employers' Federation. Full members may certify all types of plumbing work in any premises; sector scheme members may certify only the limited work within their defined scope, for example groundworkers, catering installers or point-of-use installers, so membership alone is not enough for an unvented cylinder or a whole bathroom. On completion the contractor must issue a certificate of compliance, also called a work completed certificate, to both the client and the water undertaker, and that certificate acts as a legal defence if the work is later found non-compliant.
- strong RN-D4T1IG
WaterRegsUK (Water Regulations Advisory Scheme)
The practical translation of Schedule 2 paragraph 15, which requires every plumbing system to incorporate protection against backflow, and it is the page that decides whether a tap may be fitted below the spillover level. Fluid categories: 1 wholesome mains water; 2 water whose taste, odour, appearance or temperature has changed, including hot water; 3 slight health hazard, such as common disinfectants; 4 significant health hazard, such as pesticides; 5 serious health hazard, including pathogens and faecal matter. The device fitted must be rated at or above the highest category downstream, for back pressure or back siphonage as applicable. Non-mechanical air gaps: Type AA unrestricted discharge and Type AB weir overflow both protect to category 5. Type AUK2, the tap gap over a domestic bath, basin, bidet or sink, requires a minimum vertical distance from outlet to spillover level of 20 mm for outlets up to G1/2, 25 mm above G1/2 up to G3/4 and 70 mm above G3/4. Type AUK3, over higher-risk appliances, requires 20 mm or twice the inlet pipe diameter, whichever is greater. Mechanical: Type BA RPZ valve to category 4, Type EC and ED double check valves to category 3, Type EA and EB single check valves to category 2. A Type DC pipe interrupter over a WC must sit at least 300 mm above the pan spillover level, or 150 mm in Scotland, and discharge vertically downward.
- strong RN-4TB144
WaterRegsUK (Water Regulations Advisory Scheme)
What the water regulations demand of the cold water cistern sitting in the loft, which matters as soon as a loft is boarded, insulated or converted. Every cistern needs a rigid, close fitting and securely fixed lid or cover, of a material that does not shatter or fragment when broken, so that light and insects are excluded. Overflow and warning pipes must be screened with a mesh no greater than 0.65 mm opening, the screen fitted vertically and removable for cleaning. The minimum internal diameter of a warning pipe is 19 mm, and every cistern must have an overflow with a warning pipe to signal impending overflow. Cisterns over 1,000 litres should be capable of inspection and cleansing without being wholly uncovered. Storage volume should be sized to avoid stagnation, following BS EN 806-2. Both hot and cold pipework should be insulated so stored cold water is not warmed. The page names the applicable Schedule 2 paragraphs across England and Wales, Scotland and Northern Ireland as 2 to 11, 14, 15, 16, 20 and 27.
- strong RN-9KXJXY
WaterRegsUK (Water Regulations Advisory Scheme)
How a fitting actually proves it complies, and why a WRAS logo is evidence rather than a legal passport. Water undertakers consider declarations of performance issued against designated standards, product certification and test reports, judged case by case, with no single mandated format. The routes are conformity with an appropriate British Standard such as BS EN 806 or BS 8558, conformity with a specification approved by the regulators, and for any material in contact with drinking water, compliance with BS 6920 on the effect of materials on water quality. Water undertakers retain absolute discretion on whether an alternative national specification gives equivalent protection. For white goods the page warns that BS EN 61770, the standard for connecting appliances to the water mains, is not sufficient on its own: additional evidence of BS 6920 compliance and conformity with the Regulators' Specification is required, which is the usual reason an imported dishwasher or washing machine hose fails. The overriding principle it states is that being of an appropriate quality and standard does not of itself guarantee compliance, because suitability depends on the system, environment and operating conditions in which the fitting is used.
- strong RN-6QKS6J
WaterRegsUK (Water Regulations Advisory Scheme)
The full device table, and the page to open when deciding what protection a specific fitting needs. Non-mechanical: Type AA unrestricted air gap and Type AB weir overflow both protect to fluid category 5, with the gap no less than 20 mm or twice the internal diameter of the supply, whichever is greater; Type AC to category 3 with an overflow of at least 19 mm internal diameter; Type AD horizontal air gap to category 5; Type AF vertical air gap to category 4 with an overflow of at least four times the inlet pipe cross-sectional area; Type AG vertical air gap to category 3 with a 19 mm circular overflow. Type AUK1 protects to category 3 against back pressure and category 5 against back siphonage, with the maximum fluid level in the receiving vessel at least 300 mm below the spillover level. Type AUK2, the domestic tap gap, protects to category 3 at 20 mm for outlets up to half inch, 25 mm above half up to three-quarter inch and 70 mm above three-quarter inch. Type AUK3 protects to category 5 at 20 mm or twice the inlet diameter. Type DC pipe interrupter protects to category 5 against siphonage only, fitted not less than 300 mm above a WC pan spillover level or 150 mm above the sparge pipe outlet. Mechanical: Type BA verifiable RPZ to category 4, Type CA non-verifiable disconnector to 3, Type EC and ED double check valves to 3, Type EA and EB single check valves to 2, Type HA hose union backflow preventer to 2 for existing installations only, Type HC divertor with automatic return to category 3 siphonage only, Type HUK1 hose union tap with integrated double check valve to category 3.
- strong RN-M8MFKN
WaterRegsUK (Water Regulations Advisory Scheme)
Why the kitchen cold tap is treated differently from every other outlet in the house. Where water is supplied for drinking, cooking, bathing or washing, that is domestic use, a drinking water tap must be installed, and Schedule 2 paragraph 27 is the governing requirement across England and Wales, Scotland and Northern Ireland. The recommendation is that the drinking water tap be supplied direct from the mains, that is not through any water fitting which stores, treats or filters the water, though an alternative arrangement is permitted where wholesomeness is maintained. A water softener or conditioner may be installed provided that, where the softened or conditioned water will be used for drinking, cooking, bathing or washing, it remains wholesome to drinking water quality standards, which is the reason most softener installations keep one unsoftened tap at the kitchen sink. The page also names Schedule 2 paragraphs 2, 3, 4, 5, 7, 11, 14, 15 and 24 and regulations 3, 4 and 5 as relevant to the installation.
- strong RN-PLA4M5
WaterRegsUK (Water Regulations Advisory Scheme)
The WaterRegsUK topic page that maps which Schedule 2 paragraphs govern a hot water or heating installation across the three UK regimes, listing paragraphs 17, 18, 20 and 23 as the applicable requirements for England and Wales, Scotland and Northern Ireland. Paragraph 17 is the unvented water heater and expansion requirement, exempting only instantaneous heaters of 15 litres or less; paragraph 18 covers the discharge from a temperature or expansion relief device; paragraph 20 covers vented systems and vent pipe arrangement; paragraph 23 covers water used in a primary circuit. The page's practical points are that unvented systems sometimes need topping up and that doing so must not create a backflow path from the heating circuit to the wholesome supply, which is why a permanently connected filling loop is prohibited by paragraph 24, and that expansion vessels must be installed correctly to remain effective. Use it as the index into the correct paragraph before quoting the regulations at an installer, then read the paragraph itself on legislation.gov.uk.
- strong RN-3T57NZ
WaterRegsUK (Water Regulations Advisory Scheme)
The map of which water fittings rules apply where, which matters because the three UK regimes are similar but not identical and readers routinely cite the wrong one. England and Wales are governed by the Water Supply (Water Fittings) Regulations 1999; Scotland by the Water Supply (Water Fittings) Byelaws 2014; Northern Ireland by the Water Supply (Water Fittings) Regulations 2009. All three cover the design, installation, operation and maintenance of water fittings, with the stated purpose of preventing contamination, misuse, waste, undue consumption or erroneous measurement of water. All three apply to any premises connected to a mains water supply, including where the mains is only a backup, and they place legal duties on owners, occupiers and the plumbing contractors doing the work, not just on the installer. Enforcement sits with the water undertakers, the regional water companies, which have a legal duty to enforce through inspection and enforcement action, and non-compliance is a criminal offence. Note the differences in fluid-category detail and in device positions, for example the 300 mm pipe interrupter height in England and Wales against 150 mm in Scotland.
- strong RN-4E6TZI
WaterRegsUK (Water Regulations Advisory Scheme)
The step most bathroom and kitchen projects skip. Notification to the water undertaker before work starts is a legal requirement under Regulation 5 of the Water Supply (Water Fittings) Regulations 1999 in England, Wales and Northern Ireland, and under Byelaw 5 of the Scottish Water Byelaws. Notifiable work includes installing an unvented hot water storage system, a water softener or softened water system, water treatment equipment, most alterations to the supply pipe and most alterations to internal pipework, with differences in the detail between the four nations. The undertaker has 10 working days to respond to a valid notification and the proposed work should not start until those 10 days have elapsed. If no response arrives inside 10 working days, consent is deemed granted and the work may proceed, but the owner or occupier keeps the legal obligation to ensure the installation fully complies with the regulations. Work by an approved contractor can be self-certified rather than notified.
- strong RN-VK9C3X
WaterRegsUK (Water Regulations Advisory Scheme)
The device required where a domestic system reaches fluid category 4, which in a house usually means a heating filling loop with inhibitor, an irrigation system or a whirlpool with additives. An RPZ valve, formally a BA device, is a mechanical backflow prevention assembly combining check valves and a relief valve in different zones, protecting against both back pressure and back siphonage, and rated for fluid category 4 and below. The requirement flows from Schedule 2 paragraph 15 of the Water Supply (Water Fittings) Regulations 1999 in England and Wales, the equivalent byelaw in Scotland and the corresponding Northern Ireland regulations, and applies where the water undertaker classifies the system as fluid category 4. Installation or relocation must be notified to the water undertaker no less than 10 working days before work starts. Installation must follow the Water Industry RPZ Approved Installation Method (AIM), with compliance testing by a competent tester before commissioning and at least annually thereafter, the interval set by the local undertaker. From 2026 test equipment must meet a new minimum specification and testers must periodically revalidate their qualifications. There is no legal restriction on who installs an RPZ valve, but competence is required.
- strong RN-6JC8VR
WaterRegsUK (Water Regulations Advisory Scheme)
The successor site to WRAS (www.wras.co.uk now redirects here), covering the water fittings regulations and byelaws across England, Wales, Scotland and Northern Ireland. Its Topics section holds guidance on installing pipework, bathrooms, cold water storage, RPZ valve assemblies, hose union taps and approved contractors. The Regulations section sets out the requirements by region, the regulators' specifications and related legislation; the Guidance section covers notification of installations to the water undertaker and contractor self-certification certificates. The Publications section carries booklets, checklists, information and guidance notes and Approved Installation Method documents, plus backflow prevention material keyed to the five fluid risk categories.
- strong RN-JDN21B
WRAS Approvals Ltd
The certification scheme whose approval mark on a tap, shower, pump or cylinder demonstrates compliance with the water fittings regulations. WRAS describes itself as an independent UK certification body for plumbing products and materials accredited to ISO 17065, with more than 8,000 approved products in its directory. Approvals are searchable by seven digit WRAS approval number, company or keyword, and the public directory covers products and materials approved in the last five years, so an expired or absent listing is itself a finding. The scheme runs both product approvals and material approvals and operates a laboratory recognition programme for the accredited test houses.
- good RN-PI3QII
The Tile Association
The Tile Association's 28-page Tiling Guide, produced by its Technical Committee, giving practical guidance on the key installation issues tilers meet day to day, and cross-referencing the TTA's wider range of Technical Publications, which are free to download for members and registered architects. The TTA was formed in 2000 and is the trade association for the entire UK and Irish tiling sector, covering tiling contractors, fixers, distributors, retailers and manufacturers, based at 1 Rutherford Court, Staffordshire Technology Park, Stafford ST18 0GP. Its site also carries a Tiling standards section, technical FAQs, a technical inspections service and a Find a Tiler directory, plus training routes through apprenticeships, NVQs and CSCS cards, heritage tiling and the Master Craftsman Award.
- good RN-9ZFQ1C
The Tile Association (TTA)
The industry's own document set for tiling, and the place to send anyone whose tiler is improvising. The Tile Association lists fifteen technical documents: Tiling With Resin Agglomerated Tiles; External Tiling to Balconies, Terraces and Patios; Installation and Fixing of Natural Stone Tiles and Slabs to Internal Walls and Floors; Uncoupling Membranes; Internal Ceramic Tiling to Sheet and Board Substrates; Tiling to Heated Floors; Tiling to Calcium Sulfate Based Screeds; Ceramic and Natural Stone Floor Tiling to Acoustic Systems; Tiling in Wet Rooms and Showers; The Cleaning and Maintenance of Ceramic Tiles; Slip Resistance of Hard Flooring; Movement Joints in Internal Tiling; Large Format Tiles in Internal Tiling; Design and Construction Process for Swimming Pools; and Adhesives and Grouts in Internal Tiling. TTA members download them free; non-members buy the PDF for 60 pounds plus VAT. Between them these are the recognised UK guidance for the four questions that actually cause tiled floor failures: heated screeds, calcium sulfate screeds, movement joints and wet room falls and tanking.
- fair RN-9T2LVP
Scottish Water
SCOTLAND. Plumbing and water fittings in Scotland are governed by the Water Byelaws enforced by Scottish Water, not by the Water Supply (Water Fittings) Regulations 1999 that apply in England and Wales, so an England-based note on notifiable plumbing work, backflow protection or fittings approval names the wrong instrument for a Scottish job. The page is Scottish Water's entry point for the Water Byelaws that protect water quality and for the separate trade effluent consent system covering waste water discharged to the public sewer by a business.
- supplier figure RN-1V0OHL
Bathroom Mountain
Bathroom Mountain publishing its own price guidance for this work. A trade supplier writing about what it charges is evidence of the market rate and not a quotation, and the cost book treats it as one figure among several rather than on its own