Pump Flow Direction

Blue_macca · 19 Jan 2006

A new pump has been fitted to my Potterton Flamingo 50 Boiler. The Pump is located below the boiler with the flow directed away
from the boiler. When the heating is on the boiler is firing but the Rads in all rooms including the HW only get lukewarm. I was wondering if the pump flow is the correct way around? The boiler has one pipe located at the bottom and one at the top. The upstairs rads are first on the system. I have water in all rads and the pump is primed, there is also water in the header tank :

kevplumb · 19 Jan 2006

turn the pump round and see if it makes any difference

bab · 19 Jan 2006

If the pump is on the flow(top pipe) it should pump away & if on the return (bottom pipe) it should pump back into boiler.

Blue_macca · 19 Jan 2006

Hi Kevplumb

Thanks for the prompt reply,

Are there any issues i.e damage to the boiler if i turn the pump around? Should the pump be pushing the water through the boiler or through the rads first?
I tried to look for information for the Potterton Flamingo to see which pipe was the inlet and which one the outlet on the boiler no luck

kevplumb · 19 Jan 2006

top pipe is the flow
no it won't damage it just won't work right

Softus · 19 Jan 2006

Blue_macca said:
Are there any issues i.e damage to the boiler if i turn the pump around? Should the pump be pushing the water through the boiler or through the rads first?

Just to answer this particular point (because kevplumb has dealt with the main issue), there's no rule about flow needing to be towards or away from the boiler.

If you think about it, in a closed circuit, the pump is always pushing towards the boiler, no matter how far away from the boiler it might be. The more important factors are the position of the cold feed and the open vent (where the system has them) relative to the pump.

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Pump Flow Direction

Blue_macca

kevplumb

bab

Blue_macca

kevplumb

Softus

DIYnot Local

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