Our expert plumbers have kindly agreed to share their wisdom on such topics as water tanks, dealing with a leak, copper piping, and pipe sizing, dishwashers, toilet and washing machine installations, soil pipes, shower advice, dripping taps, and much more.
Question. my boiler keeps losing pressure and needs filling from the loop every day, even though there are no sign of leaks under the floors or from the boiler overflow outlet
Answer. If you have no signs of a leak and you’re losing pressure, your pressure relief valve is probably letting by, this is a safety valve which allows water to escape outside safely if the central heating pressure becomes too high, it will normally be a 15mm copper pipe going through the wall outside it will just be kicked back on itself. if you know where this is or can trace the pipe to outside if the wall is wet or has an orange-like stain or you can see it dripping that is most probably you’re the problem, all so when you refill the system you should vent the radiators just in case there any air in the system.
hope this is of some help,