Water supply pulsating!

[Dangerous]

Hi, I Have an Autocruise Stardream and have just fitted a replacement Shurflo water pump. The pump is operating and works fine on the kitchen sink but when using cold water supply on wash basin or shower it is pulsing and is not providing a constant stream of water. On the hot setting it doesn't appear to be doing this. Has anyone got any ideas of how to rectify this and if I can't resolve the problem will this do any damage to the new pump? Many thanks !

 

[Robert Clark]

 

[Landy Andy]

Are you sure you’ve got all the air out?
even to the toilet supply?

 

[Dangerous]

Thanks for video Robert, will try toilet water supply Andy.

 

[webby1]

We had a similar problem.
Working fine on hot but pulsing on the kitchen tap but not bathroom.
Anyway solved by adjust the pressure switch.
There's now a much stronger flow of water but no pulsing.

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[TerryL]

Agree the pressure is probably the problem. I fitted a Shurflo Accumulator which evens the flow out and, provided it's set up correctly, stops the pump constantly stopping/starting when using just small amounts of water.