Skip to 11:12 for the short version. If the water flow in your motorhome, camper, caravan or boat is pulsing, not flowing smoothly and the pump is cycling quickly on and off at low flow rates (tap half open or less) then this video is for you.


This problem is caused by the expansion bottle being full of water. Let some air into it by gently unscrewing it to loosen its connection.

Let me know in the comments if you have questions or criticism etc, happy to hear it all!