Hi everyone,
I'm looking for advice on the "best" way to isolate my central heating pump
6 years ago I had 22mm pump valves fitted (these are the guys that compression fit to the 22mm pipework, & then fit directly to the pump flange with a (removeable from the fitting) large diameter backnut with a sealing washer.The pump failed over the weekend so I popped out, bought a new one & then couldnt undo one of the backnuts. - I'm told this isn't unusual - & I think I'm going to have to split this backnut to get the pump off
So 2 questions -
1 how can I remove the backnut from the pump - I can swing the isolating valve & pump around the olive on the 22mm pipework! So the backnut/washer/pump face are really tightly together! Ive tried bashing the pump motor housing with a copper mallet while holding the isolating valve body with mole grips - no good! There must be a magic way but I haven't thought of it yet!2 & what would you fit as isolating valves - are handle operated 90 degree ball shut off valves any good over long periods of time?
I hope I've managed to explain the problem enough for you to understand what I'm dealing with
TIA for any advice
Frank Sweeting
Frank Sweeting