hi i was at a customer's today whose shower was malfunctioning
there was very little water coming thru so i disconnected from pipework and checked for blockages and checked water pressure everything seemed ok
so tried shower and it workrd ok but when i turned off and then back on same thing happened but if i shut the isolating valve then opened it i had pressure again.
as this continued to happen my question is ???
is this as i think a problem with shower so replace shower or is there something plumbing which can explain this ??? ???
thanks for any help