Plomberie
novembre 3, 2026 · 9 min read
Plomberie
Plumbing guides.
Water, waste and heating, explained for UK homes.
Toilet cistern not filling?Seven UK-specific fixes, from fill valves and floats to debris and stop taps.
How to bleed a radiatorA step-by-step guide, plus how to top the system back up.
Copper pipe sizesThe common UK sizes and where each one is used.Toilets, basins and wastes
Radiators and heating
Pipework and water supply
Calculators.
Free gas and plumbing calculators with textbook equations and the working shown.
Questions.
What size waste pipe do I need?
In UK homes a basin normally uses 32mm waste pipe, while baths, showers and kitchen sinks use 40mm. Toilets connect to a soil pipe, usually 110mm.
What size copper pipe is used in UK homes?
15mm and 22mm are the standard sizes. 15mm feeds most taps and radiators, and 22mm is used for main runs and higher-flow supplies.
Can a plumber work on my gas boiler?
Only if they are on the Gas Safe Register. By law, anyone working on gas appliances or pipework must be Gas Safe registered, though any plumber can work on the water side of a heating system.
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