Problems after replacing a pump

[scott488]

Just turned all the hot ones off, fingers crossed!

 

[scott488]

Well truning all the hot rads off didnt make any difference....the ones downstairs are still cold. Could this be just loads of air stuck in the system since it has been drained?

 

[JPC]

had this problem last week....as u have just done...try sticking a hose to a drain valve and open it fast for some 10-20 seconds ...or more i suppose.
the sudden opening of the drain should dislodge air blocks....
close the drain valve and check that rad is getting hot.
u might have to repeat that for all downstairs rads.
(the one i was working on was 10mm microbore which does not help

 

[mikeddavies]

SZ1301 is Satchwell 2 port spring return valve

 

[scott488]

After loads of messing around and bleeding of rads, I decided to turn the pump around.......................and hey presto, problem solved!!!

Was almost certain that it was the correct way around in the first place, but there you go........

 

[kevplumb]

fink we telt yow that two pages back

 

[ChrisR]

Just because it works doesn't mean it's right! Flipping the pump is a std way to shift air locks, but do check it's the right way round - pumps from the flow o the boiler and towards the return.