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- 6 Mar 2009
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Having problems (possibly) with a Stuart Turner dual shower pump (old Aura model, looks like the current Showermate) - it supplies a single shower and also (I know it probably shouldn’t) the hot water to three mixer taps. The cold feed to all three taps is from the mains supply and they all work.
The shower is fed from a CWST and the hot water cylinder - the hot side works fine (if you like 65 degree showers), but there is virtually no flow at all when set to cold (pump powered on or off), and the lack of flow means the pump either pulses or does not stay on at all when trying to turn down the temperature on the shower thermostat. Shower head is clean and descaled, no difference in flow with it on or off.
The pipe from CWST to pump is clear, and I can blow through the cold outlet pipe from pump to shower when the shower is turned on. I can also blow through the cold side pump inlet to outlet with seemingly little restriction with both pipes off.
Is it possible that one pump impeller can have failed, or would both sides be affected if one was blocked or seized? There is some corrosion to the cold side of the pump, possibly because one of the end cap screws was loose.
The shower is fed from a CWST and the hot water cylinder - the hot side works fine (if you like 65 degree showers), but there is virtually no flow at all when set to cold (pump powered on or off), and the lack of flow means the pump either pulses or does not stay on at all when trying to turn down the temperature on the shower thermostat. Shower head is clean and descaled, no difference in flow with it on or off.
The pipe from CWST to pump is clear, and I can blow through the cold outlet pipe from pump to shower when the shower is turned on. I can also blow through the cold side pump inlet to outlet with seemingly little restriction with both pipes off.
Is it possible that one pump impeller can have failed, or would both sides be affected if one was blocked or seized? There is some corrosion to the cold side of the pump, possibly because one of the end cap screws was loose.