Message Forums

Have a look at these posts 
 Hot water/ pressure problem?     faulty non-return valve  

atb

Wizard

hi every one.i have a swift corniche .1992.i am putting pump into water barral. water goes up to the cld taps no problem my manual tells me to open hot water taps and make sure water cums thru first before a switch emersher heater on.but there is no water cuming thru . any adviced .thanks

hi you need to wait with the hot tap open for some time before the air is removed.it sounds like a faulty non return valve though as wizard says.

www.caravanfaultfinder.co.uk NO.10

CARVER CASCADE MK2

one way to check for a faulty NRV is to take out the drain plug outside on the heater cowl,where you drain for empty.plug in the pump as per normal with a full water barrel.get someone to turn on the pump inside for a few seconds,water should gush out of the drain,if not it means no water is getting into the boiler itself past the non return valve.number 10 on dia. stowford farm///

hi sorry about not replying early .working .can u tellme is the hot water got its own pump am a bit confuzed .ma spelling is rubbish

hi,no as you draw hot water from the tank it is filled by the pump with coldsame pump by the way.

wizards picture of back of the pump socket inside,the part that is fastened to the caravan.see blue pipe this is the cold water coming in from the pump.

And if the plastic fitting snaps off and you need to remove the broken part, this is a fool proof method of doing it safely!!

How to remove broken plastic fittings in Carver Cascade water heaters

The picture is of the pressure adjusting screw which is inside where the pump fitting enters the van.  You will only have one of these to adjust if your water system is pressure operated.  The white wire is power to the pump, the blue is a water pipe.

The pump lifts the cold water from the water container outside and pumps it into the van.  The cold water pipe has 2 branches.  One goes to the cold water taps, the other feeds the hot water tank.  Once the tank is filled and heated, if a hot tap is opened the pump will operate and pump hot water to the tap and replace the water used with fresh water from outside.   It's a bit like a hot water cylinder in your house that is fed from a cold water header tank, except that in the van a pump is required to move the water.