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Quote: Originally posted by jeff juke on 19/3/2014

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As well as night time i switch the pump off everytime we go out in case there is a leak causing a flood and were not there.

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Don't know if your system is the same as our Swift challenger 1994. but its a 12v powered pressure system with an udjustable pressure sensor (dirfectly on the rear of the water inlet) I think its a whale system.

If your battery voltage is low (from a poor leisure battery) (perhaps you are turning off the mains battery charger at night allowing the battery to run down below a certain voltage) then this can cause the pump to run.

Also replace all of the rubber seals in the water inlet. (this did the trick for us) Its a really easy job if you are "good with your hands" the "non return valve" is a very simple bit of rubber that resembles a large drawing pin (circular T shape?) it has a ridge a third of the way down on the leg of the T that pulls through the hole iuntil it "clicks" in to place (I used some narrow nosed pliars to achive this Very Gently!!) I bought a cheap replacement seals kit off t'interweb about 5-6 £.There is also a large rubber washer type of seal about the size of 2p piece.

A couple of screws hold the unit in and together. There is a spring as well. So basically replace all of the rubber parts.

I think I bought the wrong kit first time round so check first.

Well !

Had a good look around the water inlet and heater area today phew!! everything looks brand new. coulod not feel any loose pipes, did not start pulling apart to check o ring, afraid i might not be able to get the rings in time away in van sunday. Also cannot for the life of me see the non return valve. anyone pinpoint it.

Kevin