Discuss Can somebody explain this please in the Plumbing Jobs | The Job-board area at PlumbersForums.net
I should add that on the job I went to it was on mains pressure, but the flow to the house is poor, if that had any effect.
, if the float valve is set at the right level and it isn't letting by, how can a reduction in water pressure cause that valve to let by when its being closed off by the water level? if anything that would only reinforce the seal being closed off by the water level, doesn't sound right or physically possible to me but that just my opinion, but that's whats happening here?
with masoods post #2, think i realise what can happen, in the sense that water pressure is also playing a part in creating the seal and when that side of it drops then theres room for it to let by ?? not much but enough, probably down to the internal tolerances around the valve?
ahhh! that explains why that shower head dripped a little...Yep, I'm doing some ongoing work in a house and every time I turn mains off and drain down, the kitchen tap runs for a bit
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