Fast cycling water pump

Question

We have a Shurflo 4008 water pump that cycles on and off continuously, especially at lower flow rates from kitchen and bathroom faucets.
TT is a 2014 Rockwood lite. Pamphlet that came with tt talks about adjusting the bypass and pressure switch, wondering if anyone has done so and where these screws would be? Didn't notice this before but nothing has be changed in terms of tubing, etc..
Thanks, Del

old-biscuit · Answer

Shurflo 4008 'off the cuff' adjustments

oxygen · Answer

Thanks for the reply. Is is best to set pump to max turns with screw or start lower initially?

wnybob · Answer

You can also try an accumilator tank.

byrogie · Answer

oxygen wrote:Thanks for the reply. Is is best to set pump to max turns with screw or start lower initially?The instructions in the link is a good place to start.....

pauldub · Answer

Maybe you need to refresh the air pocket in your water heater.  The air disolves into the water over time.  Drain and refil the hot water tank and it will probably cure your problem.

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Fast cycling water pump

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