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Discuss Hot water air lock after fitting new shower pump?? in the Plumbing Forum | Plumbing Advice area at PlumbersForums.net

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Kristian

Hi, I've just changed a stuart turner pump for a newer version (like for like). Cold water pressure is as should but hot water is trickling through maybe 35% of cold water pressure. I've turned pump off ran cold water for 5 min then hot water for 5 Min with shower head off to no joy any ideas are appreciated.
 
Can you post a photo of the installation? Did you kink any flexible hose?
 
Assuming all isolation valves are fully open, if they are the old ones or gate valves this might need to be confirmed visually.

Check the inlet filters to the pump and also the shower valve. Might have loosened some debris from pipe walls whilst exchanging pump.

Is it standard pump or negative head?
 

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