You guys are not helping the OP at all - and you're making asses of yourselves.
The pressure downstream of a restriction when there is flow will be less than it is upstream of the restriction. We were not talking about static pressure.
Thanks for the reply. I don't want to reduce the pressure overall because it is useful for baths / showers etc. So I think I will get a couple of those Fluidmaster quiet fill valves.
Talk about stating the obvious ! Who said it wasn't exactly ? ? Of course it will be. I've already stated that in my posts.
I have also clearly explained the difference between static and dynamic pressure for the benefit of those who don't understand basic fluid dynamics. .
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