Bathrooms
177 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 5 of 5.
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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.
- 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.
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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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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.
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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.
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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
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Boiler Central
Boiler Central 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
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Screwfix
the retail price Screwfix publishes for floplast solvent weld pipes white 50mm x 3m, which is the supply figure the cost book records for this item
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Toolstation
a Toolstation category listing for bathroom showers, recorded as the page a price was read from. What it lists, and at what price, changes with the range, so it evidences that a figure was seen at this merchant rather than a price a reader can confirm today
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Toolstation
the retail price Toolstation publishes for the Ideal Standard i.life S compact wall hung toilet and soft close seat, which is the supply figure the cost book records for this item
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Toolstation
a Toolstation category listing for Shower Heads, recorded as the page a price was read from. What it lists, and at what price, changes with the range, so it evidences that a figure was seen at this merchant rather than a price a reader can confirm today
- supplier figure RN-EKVSON
Toolstation
a Toolstation category listing for Sinks & Waste Disposal Units, recorded as the page a price was read from. What it lists, and at what price, changes with the range, so it evidences that a figure was seen at this merchant rather than a price a reader can confirm today