Hi everyone....I'm just starting to pull what little hair I have left out. We have a truma water heater. ..whale pump and truma taps. Everytime we prime the taps,the water flows great but within 5 minutes of turning them off, the water has gone (I presume) back into the water hog.Is there a non return valve anywhere on the system that could be jammed? We dare not use the water heater while this is happening for fear of heating an empty boiler. . Thanks
Yes there will be a None-return valve somewhere in the system. Probably in the 'Inlet' socket that you plug the pump into or possibly in the pump itself. You haven't really given us that much information about the caravan. If the inlet is a Crystal one with a filter then it is in that, but I don't know if it is serviceable. The easy option may be to fit a None-return valve into the pipe coming off the inside of the Inlet (assuming you can access it). They can easily be bought from the likes of Ebay.
Elnagh Clipper 90.......... Real Names Mike & Hazel
Hi Trooper...Thanks for the reply. I have a Swift Sandymere 2003 fitted with a Whale EP1312 water pump and Truma Ultrastore heater. I found the one way valve directly in front of the tap to empty the boiler and fitted a new truma valve....seemed to work fine for an hour or two but were now back to the taps seemingly draining and allowing air into them...totaly baffled now....
Hi, I've just come back from a weekend away and saw your post.
Reference the taps apparently emptying themselves, have you had a good look round the system for leaks? I'm sure you have but it is worth checking.
It is possible for there to be an air leak at a connection which, although big enough to let air into the system, isn't big enough to manifst itself as an obvious a water leak. This results in a reduction of pressure.
It may be worth going round all the connections and making sure that they are secure. If the connections have Jubilee clips, check that they are tight.
Apart from that, like Trooper, it's got me beaten without actually seeing what is going on.
I would still be looking at a non-return valve in the pump intake system.
Thanks for your help guys....think the problem is solved, it looks like the previous owner had played about with the tap which wasnt fully tight,and like Dickers says, was just letting a little air in...tightened it up and seems fine now...Fingers and everything else crossed....Thanks for your help guys