I am having a job done, to install Essex flange, no return valves and a anti-gravity loop, as I keep getting air in my system, the shower pump slows down and gets very noisy, also sometimes when opening a hot tap it triggers the shower pump briefly, and I also get warm water out of the hot tap when the heating is in for around 15 seconds(this might be unrelated), have had a quote for £350.00 all in does this sound reasonable?.
