Wickes 1.5bar twin impeller shower pump problems!!!

[diy john]

Help!!
I have just replaced a worn out shower pump with an equivalent spec pump: Wickes 1.5bar twin impeller, in a conventional gravity fed hot water system.
I thought it would be a straightforward swap, but having been through all listed trouble shooting tips and checked for air locks, correct connections, debris in filters etc I can not find the reason why the water that now comes out from the attached shower is fluctuating in temperature. The pressure is good and maintained and the pump is activating and can be heard running as normal. Help!!!

 

[dancinplumba]

hi, what was wrong with old pump ? is pump piped up correctly ?

 

[SimonJohns]

This may be a problem linked to your shower valve

If you have a thermostatic shower. There is a possibility you could of got some debris in valve while changing the pump over

 

[Guest123]

If the water pressure and the flow is being maintained, then it must be the shower itself. You should strip it down, remove the filters and give it a good clean out. If you have access to another shower, try this in place of the original and if it works ok, there is your answer.

 

[MP plumb]

did the original pump work ok? did you ask if there was any problems with the pump before it broke down? (if not, are the pipes are the right angle to stop air getting into the system?)

 

[diy john]

Hi all, sorry have not had time to check your replies till now, but thanks for getting back to me s quickly.
The old pump had been in use for about 6 years and had developed a leak and become quite noisy, otherwise was doing its job.
The shower is part of a tap/mixer tap assembly without a thermostatic valve so not sure what i need to check.
The pipework to the pump are as before, so again, not sure what is meant by right angles to stop air getting in, can you explain?

thanks again

 

[smtplumbing]

is it mains pressure to the shower pump

 

[diy john]

No. the feed to the pump and the hot water cylinder is from the cold water tank in the loft

 

[smtplumbing]

just making sure you bought the right pumphave your stripped the pipework to the pump to make sure no dirt has been pulled from the tank

 

[Howsie]

Sounds very much like crud in the cartridge as a pump cannot be the cause of fluctuating temps.

 

[stevetheplumber]

sounds like this pump feeds a bath shower mixer so no stat problems i would think you have a problem with one of the supplies either airlocked or partialy blocked what happens if you run just ho t or just cold ?

 

[SimonG]

Tell somebody to stop opening the hot tap downstairs when you're in the shower!