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I am having similar issues with my cascade2 water heater, After draining the system last autumn,came to use the van for the first time this week, The cold was fine but no hot, I went outside to see water coming from the surround of the filter. After closer inspection i saw some hairline cracks on the housing where the filter screws in. I assumed this was reason for leak, so fitted a new housing and filter. it worked for a while but lots of air and gurgling prior to hot water coming out.when tried next day again no hot water, went outside and pump working but water coming from vent cowling(not drain valve area) Afetr seeing posts I opened the drain valve (bottom left of vent cowling) and it came out fast cpl of feet distace from van!!

Any ideas looking on forums loads of differnt answer, poss a blockage or non return valve.

Any help would be great.

I'd go for a stuck non return valve .

atb

Wizard

Yes if non return valve is stuck it can cause a buildup of pressure --hence release from pressure relief valve.

Brian

Hi Gary, Thanks for the reply.

the water was coming from the top left as stated, when i tried to remove the part it did snap off, just before the thread.looking at your other posts i used a junior hacksaw blade and screw driver to remove the platic thread part.the part that broke was a white plastic item with a plastic end that seemed to be connect to a spring as you can pull it out with a lot of resistance and would return back to it's orginal state.

found a pic of the item. it was leaking from near the rubber gasket.

Does this still sound like QDV body (sorry but not sure what a QDV is).If so how can I sort the problem or can you sell me a replacement?

Thanks for your time

Thanks for the replys, sorry for sounding thick about this but from my orginal post, do you think replacing the pressure relief valve , will solve the problem our does it sound this was only part of the problem.

cheers