If I convert my loft tank fed system to a presurised system (combi for hot water) - do I need to reduce the mains pressure for taps, toilet cisterns, etc?
Do the Water Byelaws (Scotland!) require this?
Regards
Measure the static pressure. If it is much above 3 bar, then install a pressure reducing valve.
Even if it is OK, you may wish to restrict the flow into the toilet. This can be done by inserting a reducer into the toilet valve or even just by turning the isolation valve off a bit until the flow rate is right. You can use the same trick on the basin if you want to prevent too much flow.
Christian.
It depends if your incoming pressure is high ... I have a pressure regulator on my incoming mains it is adjustable, but I have it set to 3.5bar as this is normal safe working pressure for Thermal Store.
As I have mains pressure hotwater ... this means I have 3.5bar hot & cold at all the taps, which is a lot of pressure. (around 50 psi)
Rick
I used a PRV, but only because the incoming mains pressure is so high here, I didn't fancy feeding 7 bar to the toilet cistern ;)
Not connected with using a PRV, but since you are converting from stored water, do you have a bidet or a shower handset which could drop into a bath? Think they would need at least need non return check valves fitted...
Lee
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