Kitchens
83 sources in the library on kitchens. 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 2 of 3.
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The National Archives (legislation.gov.uk), UK Statutory Instrument 1998/2451
The legal bar on non room-sealed gas appliances in bathrooms and bedrooms, which is what decides whether a boiler can be moved into a bathroom or airing cupboard off one. Regulation 30(1) prohibits installing any gas appliance in a room used or intended to be used as a bathroom or shower room unless it is a room-sealed appliance. Regulation 30(2) prohibits a gas fire, other gas space heater or gas water heater of more than 14 kilowatt gross heat input in a room used or intended as sleeping accommodation unless it is room-sealed. Regulation 30(3) allows such an appliance of 14 kilowatt gross heat input or less, and an instantaneous water heater, in sleeping accommodation only where it is room-sealed or incorporates a safety control designed to shut the appliance down before a dangerous quantity of combustion products builds up in the room. Regulation 30(4) extends all three prohibitions to a cupboard or compartment within such a room, and to a cupboard, compartment or space adjacent to such a room if there is an air vent from it into the room.
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Welsh Government
The Welsh edition of Part H, November 2023, and the source of the waste pipe sizes every bathroom and kitchen move depends on. Every point of discharge must have a trap that retains a minimum seal of 25 mm of water under working and test conditions. Table 1 sets minimum trap sizes and seal depths: washbasin and bidet 32 mm trap with 75 mm seal; bath, shower, food waste disposal unit, urinal bowl, sink, washing machine and dishwashing machine 40 mm trap with 50 mm seal, except the sink and appliance group listed at 75 mm seal; WC pan with outlet under 80 mm, 75 mm trap with 50 mm seal; WC pan with outlet over 80 mm, 100 mm trap with 50 mm seal. A basin seal may drop to 50 mm only with flush grated wastes without plugs on spray tap basins, and where an appliance discharges directly to a gully the seal may drop to not less than 38 mm. Other figures: a branch discharge pipe must not enter a stack lower than 450 mm above the invert at the foot of the stack; a branch serving one appliance should be the same diameter as its trap; branch pipes of 75 mm or more joining a stack of equal diameter need a 50 mm radius sweep, smaller ones 25 mm radius or 45 degrees; a boiler condensate connection needs a 75 mm condensate trap; a ventilating pipe should connect within 750 mm of the trap and be at least 32 mm where it has up to 5 bends.
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Welsh Government (gov.wales)
The Welsh Approved Document G, which differs from the England version on the headline water figure and is therefore the source to cite for a Welsh reader. Regulation 36 requires the estimated consumption of wholesome water to be not more than 110 litres per person per day where a dwelling is erected, or 125 litres per person per day where a dwelling is formed by a material change of use, against England's 125 litres with 110 as an optional tighter standard. Regulation 37 requires the water efficiency calculation to be notified to the building control body, and the completed notice must state, for example, less than 110 litres per person per day using the fittings approach. G3(3) requires the hot water supply to a fixed bath to incorporate measures ensuring delivered temperature does not exceed 48 degrees C, by an in-line blending valve or other appropriate temperature control device that cannot be exceeded in operation. It cites BRE Information Paper IP14/03 Preventing hot water scalding in bathrooms: using TMVs. First published 5 April 2017, last updated 10 May 2023.
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Welsh Government (gov.wales)
WALES. Published 3 April 2017 and not updated since, a 3 MB PDF to be read with the September 2013 amendment slip. This is the Welsh Part P, and it is not the same document as England's 2013 edition. Wales did not follow England in narrowing the definition of a special location, so the scope of notifiable domestic electrical work is wider in Wales. Cite this rather than the England Approved Document P for any Welsh rewire, kitchen or bathroom job.
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Welsh Government (gov.wales)
WALES, and this is a hard contradiction with England. The Welsh Approved Document P states that notifiable jobs include new circuits back to the consumer unit AND extensions to circuits in KITCHENS and special locations such as bathrooms, and that consumer unit replacements are notifiable. England's Approved Document P 2013 edition defines a special location at regulation 12(9) as only the zone around a bath tap or shower head, extending 2.25 metres vertically and 0.6 metres horizontally from a bath tub or shower tray, or 1.2 metres from a shower head where there is none, plus a room containing a swimming pool or sauna heater, so a kitchen is NOT a special location in England and extending a kitchen circuit there is not notifiable. In Wales it is. The Welsh document also confirms replacement, repair and maintenance work is generally not notifiable even in a kitchen or special location, that in large bathrooms the special location is bounded by the walls of the bathroom, and that conservatories, attached garages, detached garages and sheds are not special locations, so work there is notifiable only if it involves a new circuit.
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BSI
BS 6465-1:2006+A1:2009, in effect from 31 March 2006 with Amendment 1 in 2009, prepared by Technical Committee B/503 Sanitary appliances, ISBN 978 0 580 67116 6, current. It is the code of practice for designing sanitary facilities and setting the scale of provision of sanitary and associated appliances, and it supersedes BS 6465-1:2006. It sits in a suite of four standards: Part 1 scales of provision, Part 2 space recommendations, Part 3 selection, installation and maintenance, Part 4 provision of public toilets. It traces back to CP 305-1 first published July 1952, with the third edition issued as BS 6465-1 in February 1984 and the fifth in March 2006. Use it to establish how many WCs and basins a dwelling should have.
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BSI
BS 8000-11:2011, published 31 January 2011, committee B/539, current. It gives recommendations on basic workmanship on building sites, both commercial and domestic, for the tasks frequently carried out in wall and floor tiling. It applies to fixing ceramic and agglomerated stone tiles, natural stone and terrazzo tiles and slabs, and mosaics to walls and floors using adhesive and mortar. It states plainly that its recommendations are not necessarily comprehensive and that a project specification might need to cover more. It signposts the rest of the family: design aspects of wall and floor tiling are in BS 5385, natural stone cladding and lining in BS 8298, and the harmonised product specifications are BS EN 12057 for natural stone tiles, BS EN 12058 for slabs, BS EN 14411 for ceramic tiles, BS EN 15285 for agglomerated stone and BS EN 12004 for adhesives, with BS EN 12440 for natural stone naming.
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BSI
The safety standard a built-in oven, hob or range must meet, and a designated standard in UK law, so conformity gives presumption of conformity with the electrical safety regulations. Published 31 May 2020 as BS EN 60335-2-6:2015+A11:2020, current but under review. Its scope covers the safety of stationary electric cooking ranges, hobs, ovens and similar appliances for household use, rated at not more than 250 V for single-phase appliances connected between phase and neutral and 480 V for other appliances, which is why a large range cooker may need a dedicated higher-rated supply. Named examples inside scope are griddles, grills, induction hobs, induction wok elements, pyrolytic self-cleaning ovens and steam ovens; some requirements for ovens intended for use on board ships are also included. The standard deals with the common hazards presented to all persons in household and similar environments but expressly does not take account of children playing with the appliance, use by very young children, or use by young children without supervision, and it recognises that very vulnerable people may have needs beyond the level it addresses. Part 1, BS EN 60335-1, supplies the general requirements this part modifies.
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BSI (British Standards Institution)
STATUS: CURRENT. BS 6172:2010+A1:2017 was published 31 July 2017 and supersedes BS 6172:2010, which superseded BS 6172:2004 and BS 6172:1990. It specifies requirements for the safe installation, servicing and maintenance of domestic gas cooking appliances, with installation defined to include design, inspection and commissioning, and it applies to new, previously used and second hand appliances in dwellings, leisure accommodation vehicles, residential park homes and permanently moored boats, but not towed or motorised caravans. The A1:2017 amendment reflects European changes allowing gas cooker hoses and sockets to BS EN 14800 and gas hose connection valves to BS EN 15069. This is the standard behind a kitchen note's statement that a gas hob or cooker must be connected by a Gas Safe registered engineer, and it works with BS 5440-2 for ventilation. Catalogue page confirms number, title, date, status, supersession and scope.
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BSI (British Standards Institution)
STATUS: CURRENT. BS 6222-2:2009+A1:2017 (base edition published 31 January 2009, amended 2017) specifies the performance requirements and test methods for the strength and durability of the structure of domestic and residential fitted kitchen units, peninsular units, island units and breakfast bars. It EXCLUDES free standing units and storage furniture for other applications, and it does not cover worktop or storage unit safety, which sit in BS EN 14749:2016+A1:2022, Furniture. Domestic and kitchen storage units and kitchen worktops. Safety requirements and test methods. Together with BS EN 1116:2018 for coordinating sizes this is the pair a kitchen note should cite: BS EN 1116 for whether a unit fits, BS 6222-2 for whether its carcass will survive use. Catalogue page confirms number, title, date, status and scope; the tests are paywalled.
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BSI (British Standards Institution)
STATUS: CURRENT. BS EN 1116:2018 was published 28 February 2018, is identical to EN 1116:2018, ISBN 978 0 580 94536 6, and supersedes BS EN 1116:2004. It specifies coordinating sizes for kitchen units, worktops, recess panelling, furniture fronts and decorative panels, and for kitchen appliances (white goods and ovens) and further installation elements such as sinks, giving the height, width and depth dimensions and the space needed to integrate an appliance into a unit. This is the standard behind the 600 mm module and standard carcass depths that make an integrated appliance fit a run of units, and it is what a note should cite when explaining why a replacement dishwasher or oven fits an existing housing. It does not cover commercial kitchens in hotels or restaurants. Catalogue page confirms number, title, date, status, ISBN and scope; the dimension tables are paywalled.
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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.
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BSI (British Standards Institution)
The product standard for domestic kitchen sinks, the counterpart to BS EN 14688 for basins. Published 31 Oct 2018, current but under review. It specifies the functional characteristics and test methods for kitchen sinks for domestic purposes that ensure satisfactory performance when the sink is installed in accordance with the manufacturer's instructions, and its definition of domestic purposes extends to hotels, student accommodation, hospitals and similar buildings. Two exclusions are useful when reading a spec sheet: the standard does not specify aesthetic characteristics or the overall dimensions of kitchen sinks, so bowl sizes are a manufacturer choice not a standardised one, and it does not apply to industrial kitchen sinks.
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BSI (British Standards Institution)
The standard that defines what a quartz worktop actually is, which matters because quartz, engineered stone and agglomerated stone are the same product family under different marketing names. Published 31 Aug 2009 and Current. It specifies the terminology and classification of agglomerated stone products, which it describes as mechanically fragmented stone material mixed with a cementitious binder and then sawn into slabs, tiles and other architectural elements, giving the industry common ground for buyer and vendor agreements. Note 1 excludes agglomerated stone products not intended for flooring, wall finishes and similar uses, such as drainage channels and structural elements. Note 2 states it does not apply to terrazzo tiles, which are covered by BS EN 13748-1 and BS EN 13748-2. It is the reference for distinguishing engineered stone from natural granite, which is a different material with different standards and, in fabrication, a different silica dust exposure profile.
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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.
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BSI (British Standards Institution)
STATUS: CURRENT (marked Under Review). BS EN 204:2016 was published 31 August 2016 and supersedes BS EN 204:2001. It classifies thermoplastic resin based wood adhesives for non structural use into four durability classes, D1 to D4, by the strength of the bond line under specified test conditions, and it applies to adhesives for bonding furniture and interior structures, panelling, doors, windows and stairs made of wood or wood based products. The class is the practical point for a note: D1 is dry interior use only, D2 occasional short term dampness, D3 frequent dampness or exterior sheltered use, D4 frequent severe exposure. It does not cover temperature resistance of the bond line, and it is not a structural adhesive standard (that is BS EN 301 and BS EN 15425). The 2016 revision removed the thick bond line test references and moved assessment to 20 test pieces. Catalogue page confirms number, title, date, status, the D1 to D4 classes and scope.
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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.
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BSI (British Standards Institution)
Part 1 of the standard behind laminate worktops, the cheapest and most common kitchen surface in the UK. Published 29 Feb 2016 and Current. It specifies the test methods for determining the performance of high-pressure decorative laminates and guides end users on keeping the surface clean, hygienic, safe and healthy. It gives an overview of the series and guidance on selecting and applying the test methods and specifications in EN 438 parts 2 to 9, so a laminate performance claim about abrasion, impact, scratch or stain resistance should trace to a numbered part of this series. It applies only to HPL produced by a high-pressure process, which distinguishes genuine HPL from lower-pressure melamine faced boards sold at similar prices.
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BSI (British Standards Institution)
The safety standard every cooker hood sold in the UK is built to, so it is the citable authority behind a hood's electrical safety claims. Published 31 Jan 2015, current but under review, with Designated status for UKCA marking. It deals with the safety of electric range hoods and other cooking fume extractors intended for installation above, beside, behind or under household cooking ranges, hobs and similar cooking appliances, with a rated voltage of not more than 250 V. Its scope also catches appliances not intended for normal household use that could nevertheless endanger the public, such as those used by laymen in shops, light industry and on farms. The standard covers the common hazards encountered by all persons in household and similar environments, but expressly does not take into account children playing with the appliance, use by young children, or user maintenance including cleaning carried out by children, which is why a manufacturer's installation height and cleaning instructions still govern.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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AMDEA (Association of Manufacturers of Domestic Appliances)
The UK appliance industry body's own explainer on ovens and hobs, useful mainly for the energy label rules a buying guide should get right. Electric ovens carried a G to A efficiency label, and since 1 January 2015 the label has been in the D to A+++ format showing annual calculated average energy use in kWh. The oven label also shows the usable cavity volume in litres, the energy consumption per cycle on the conventional setting in kWh per cycle, and the energy consumption per cycle on the forced air convection or fan setting. Hobs are not covered by the label at all, which is a common misconception in kitchen buying advice. Gas ovens carry similar labels but give two energy figures, one in MJ per cycle and one in kWh per cycle, so gas and electric ovens can be compared. Cooker hoods also carry energy labels, phased in initially on a G to A scale and later moving to D to A+++. It notes induction heats only the cooking vessel, is faster and more energy efficient than resistive hotplates or glass-ceramic tops, and is safer because the surface cools as soon as the pan is removed.
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AMDEA (Association of Manufacturers of Domestic Appliances)
The appliance industry body's explainer on waste disposal units, the appliance most often queried when a kitchen sink is being replanned. It describes food waste disposers as units set in kitchen sinks that grind food debris into minute particles which are then washed into the sewers. It cites research in Sweden suggesting a positive environmental impact: food waste carried through the waste water system reaches treatment plants that are increasingly fitted with anaerobic digesters, turning the waste into biogas for heating and electricity generation and producing organic fertiliser, rather than going to landfill where it takes up space and can leak methane. Read it against BS EN 12056-2 and Approved Document H, which govern the branch pipework the unit discharges into, and against local water company policy, since not every undertaker welcomes macerated food waste in the foul drain.
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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.
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HomeOwners Alliance
HomeOwners Alliance guide to planning a kitchen renovation. It cites the 2018 Kitchen Trends Report from Houzz for an average UK kitchen renovation budget and spend of 10,300 pounds, and gives the spread: 22 per cent of homeowners spend between 5,000 and 10,000 pounds, 27 per cent between 10,000 and 20,000 pounds, and 18 per cent over 35,000 pounds. It notes budget ranges from high-street suppliers can bring a whole new kitchen in under 10,000 pounds depending on size. Its key cost-control point is that costs can be kept down by retaining the existing lighting, waste pipes and electrical positions, so moving services is what drives a kitchen budget up. Note the underlying survey is dated 2018, so any 2026 figure derived from it needs its own uplift and should not be presented as current.
- supplier figure RN-Y23JAP
Cosentino
Cosentino's own product guide for Silestone, Dekton and Sensa. Two figures a worktop note can use. First, Dekton scratch resistance: 'It has a rating of seven (7/10) on the Mohs scale for mineral hardness', which contradicts the widely repeated Mohs 8+ claim for sintered stone, and EN 13501 and ASTM E84 classify Dekton as non-combustible. Second, crystalline silica content of engineered quartz: HybriQ Technology was introduced in 2020 and 'As of 2022, the entirety of the Silestone portfolio is manufactured sustainably with HybriQ, with a maximum of 40% of silica in its composition', made with 99% recycled water, 100% renewable electricity, zero water discharge and a minimum 20% recycled materials. The range codes are explicit: the figure next to the Q is the maximum percentage of crystalline silica, 10%, 40% or 50%, and a Q with a plus sign means at least 20% recycled material. This kills the blanket '90 to 95% quartz' description of engineered stone for at least one of the largest UK brands.
- supplier figure RN-6BZR7O
DIY Kitchens (Ultima Furniture Systems Ltd)
the retail price DIY Kitchens (Ultima Furniture Systems Ltd) publishes for Standard Corner Base - Kitchen Units, which is the supply figure the cost book records for this item
- supplier figure RN-FYN9G7
One Stop Worktops
the retailer's published size options and prices for a 12 mm Fenix NTM solid compact laminate worktop, including the 3000 x 645 x 12 mm sheet at GBP 463.03 and the 4100 x 645 x 12 mm sheet at GBP 747.80, and its separately priced fabrication options for cut-outs, radius corners and cutting to size