Discuss Cylinder return valve? in the UK Plumbers Forums area at PlumbersForums.net
Pretty sure it's the returnAre you sure its the return thats fully open or a system bypass.
There it issome pics may help you problem.
The water still continues to be warm but not hot as it used to beDidn’t I say 3 full turns closed should do it from fully open ?
So in total four turns open from closed position?Do one more turn then
I've checked and it hasn't been touchedIf your kids have played with the gate valve is it also likely they've adjusted the cyl stat?
Hi there the boiler flow is set to 75 degrees which is the max and for the return coil it is quite hot when the hot water is on. And to confirm one full turn is adequate?What is the boiler flow temperature set to? and are you allowing it enough time to reheat the cylinder??.
If you feel the return (coil) temperature is it hot/warm or only lukewarm?.
Regarding the return valve, anything more than 1 full turn open from fully shut is quite adequate.
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