We recently built a new extension and now have an upstairs bathroom and an onsuite, previously the only bathroom was downstairs. We have swapped our boiler (12Kw worcester heatslave combi) for a similar Heatslave 18/25 condensing oil combi in the same location. We left in a pressure reducing valve (3 bar) which fed cold water into to the boiler and also upstairs.
We have had 2 months of trouble free plumbing but recently the downstairs cold water was extended into a new utility room/cloakroom and we experienced really bad fog horn type noise from the pipework when using any water upstairs or through the boiler (worse at night when I presume pressure is higher) This forum was helpful in understanding the cause and the problem has been sorted temporarily by turning down the stopcock then permanantly by removing the pressure limiting valve.
Consequently we now have an even better shower (like it will wash you was you down the plughole) but I am worried that we are exceeding the recommended maximum 10 bar preesure input to the boiler and would be happy to put in a new pressure valve (but put it just after the stopcock in the kitchen to avoid any noise)
My question (so I can get the correct pressure limiter) is what is a recommended pressure for a normal 3 bed/ 2 bathroom house with combi boiler setup. (don't want to damage pipework but would like to flush the bog while the shower is running etc.) Flowrate isn't a problem, best guess at the kitchen tap is about 40 litres/min. Boiler instructions give no help other than 10 bar is maximum.
We have had 2 months of trouble free plumbing but recently the downstairs cold water was extended into a new utility room/cloakroom and we experienced really bad fog horn type noise from the pipework when using any water upstairs or through the boiler (worse at night when I presume pressure is higher) This forum was helpful in understanding the cause and the problem has been sorted temporarily by turning down the stopcock then permanantly by removing the pressure limiting valve.
Consequently we now have an even better shower (like it will wash you was you down the plughole) but I am worried that we are exceeding the recommended maximum 10 bar preesure input to the boiler and would be happy to put in a new pressure valve (but put it just after the stopcock in the kitchen to avoid any noise)
My question (so I can get the correct pressure limiter) is what is a recommended pressure for a normal 3 bed/ 2 bathroom house with combi boiler setup. (don't want to damage pipework but would like to flush the bog while the shower is running etc.) Flowrate isn't a problem, best guess at the kitchen tap is about 40 litres/min. Boiler instructions give no help other than 10 bar is maximum.
