Replacing the circulation pump

[andyholliday]

I have a terrible noise coming from the circulation pump on my central heating. I have bought a replacement one which I intend to fit. Having never done any plumbing like this before, I thought I'd ask for any tips before I start?

 

[kostello]

you should have gate valves at either end of the pump so you don't have to drain the whole system.

 

[breezer]

obvious that it is, turn the electricty supply off to the whole system. after fitting new pump it may need bleeding, do it the same as a radiator, but you see that big screw in the middle, that is the bleed valve, one more thing make sure you turn BOTH the valves back on

 

[andyholliday]

Thanks. I shall give it a crack.

 

[Gees]

And make sure you fit it the right way round ( there is an arrow )
I fitted a pump in a combi once and i fitted it the wrong way round. This places the thermostat in the return pipe instead of the flow. Heating got VERY hot.