Hi. Problem solved. There is a screw valve on both hot and cold supply to kitchen tap. Cganged the hot water valve as suddenly leaking. Now no cold feed to shower unless kitchen hot supply reduced to 10-20%. Dont think its an unvented issue at all.
Hi. Thx for the reply. What pressure is wrong?
I think there is a blockage as well, but why the shower affecting the issue?
Was hoping for a g3 reply at some stage but couldn't post this on unvented forum.
Hi. I have wanted this issue resolved since we moved in 6 years ago.
INFO
-Unvented tribune premier
Expansion vessel full of air at 2.5psi
-Gush of water when bath tap on then reduces to normal
-Towel rail in bathroom plumbed into partly central heating circuit
-dont think there is an air...
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