Comments on: Can a central heating pump be installed up-side-down and still work?

By: Jonathon Barton

Jonathon Barton — Mon, 16 Jun 2008 20:51:03 +0000

It won’t work aless there is an option to change the way it flows

By: Maren Lancaster

Maren Lancaster — Fri, 13 Jun 2008 10:17:57 +0000

Might be a problem and might not.
It basically doesn’t matter which way round the water is pumped but what is important (and many plumbers don’t know tis or don’t apply it) is the following:-

Check in your loft. If you have a seperate central heating tank with an open ended pipe hanging over the top then you have an open vented system.
In such cases the inlet of your pump (the one not marked with a -> symbol should be adjacent to or as close as possible to the expansion pipe (the other end of the hanging one as above).
Failure to do this will result in negatve pressure at the radiators causing air to be drawn in and the regular need to bleed the system.

If you previously had constant bleeding problems then reversing the pump could probably be an advantage.

If you have the more modern sealed system then it really doesn’t matter which way round you have it.

By: Princess Walmsley

Princess Walmsley — Tue, 10 Jun 2008 01:17:13 +0000

This is a Grundfos pump. There are two parts joined together with 4 bolts. You’ll need a hex driver to take them apart. You can then put them back together to put the electrical bit in any one of 4 positions. That will solve your problem.
The plumbing bit has an arrow on it to show which way the water will go. When you put it all together, make sure you get this the right way round. If you get it wrong, it won’t blow up (the boiler will cut out) but you’ll get an interesting water feature.

PS If the existing pump is the same make, you can leave the old plumbing bit in place and just replace the mechanical bit. This saves trying to undo the pump unions.

By: Samir Riaz

Samir Riaz — Mon, 09 Jun 2008 09:51:42 +0000

Nah ….. won’t work.
You will be pushing the the water the wrong way around the system. this will mean the your sensors will be measuring the temp at the wrong place in the system……. which means that it could never run efficiently. Take the pump back and swap it for the correct type.

By: Annalise Beardmore

Annalise Beardmore — Fri, 06 Jun 2008 00:35:31 +0000

I thought the job of a pump was to move the same water throughout the system, so it should work either way.

Anyway, just phone plumbworld and ask, if they are half decent they will advise.