Central Heating Pump Left in Situ.

[Nick43]

My CH pump, on an open vent system, is unserviceable and needs replacing. Trouble is it's almost impossible to access. It would save a great deal of trouble (a couple of days work!!) if I could disconnect it electrically and leave it in situ. Then fit a new pump in a more convenient position adjacent to the boiler. Can I do this, or would the old pump cause too much of a restriction?

 

[petit_pablo]

What makes it so inaccessible? You could repipe a house in a couple of days.

What type of heating system is it? Yplan, S plan, gravity hw?

 

[Boilerman2]

The old pump will indeed cause extra resistance too much??? hard to say it would not be good practice to do what you propose and the old pump should be removed - someone got it in there in the first place so it can't be impossible!!??

 

[Nick43]

The old pump will indeed cause extra resistance too much??? hard to say it would not be good practice to do what you propose and the old pump should be removed - someone got it in there in the first place so it can't be impossible!!??

It's not impossible, but some idiot has surrounded the pump with other pipework in a very restricted space between two joists. I may be able to remove the impeller from the pump, failing that I will just have to do the work of cutting and reconnecting. Thanks for your comment.
Nick

 

[minion]

Hi,

If you can get the head off to remove the impellor just replace the head. Alot easier then replacing the whole pump.

 

[kirkgas]

what about cutting the pipe either side of the pump and removing the pump and 2 bits of pipe, then simply refit the 2 bits of pipe on the new pump and refit with 2 straight couplings, i have done this many times where access is tight, you only need enough room to get the pipe slice in, then use soldered fittings to renew so no spanner access required (if you use this method make sure you know whether the pipe is 3/4" or 22mm, so that you purchase the correct fittings, (and if 3/4" it is easier to renew the 2 bits of pipe in 22mm, as you can only buy 3/4" x 22mm st, couplings as oppossed to 3/4" x 3/4")

 

[Nick43]

what about cutting the pipe either side of the pump and removing the pump and 2 bits of pipe, then simply refit the 2 bits of pipe on the new pump and refit with 2 straight couplings, i have done this many times where access is tight, you only need enough room to get the pipe slice in, then use soldered fittings to renew so no spanner access required (if you use this method make sure you know whether the pipe is 3/4" or 22mm, so that you purchase the correct fittings, (and if 3/4" it is easier to renew the 2 bits of pipe in 22mm, as you can only buy 3/4" x 22mm st, couplings as oppossed to 3/4" x 3/4")

Thanks Kirkgas, Pipe both sides is 28mm with soldered joints just where you don't need them, if I can't get the impeller out I will saw the pipes and then splice it somehow, no room for a slice .
Regards Nick