harry the horse Posted February 17, 2017 Share Posted February 17, 2017 What causes water to drip from the heater cowl on the outside of my van. I can see a metal overflow pipe it's coming from that. Thanks H Link to comment Share on other sites More sharing options...
paulmold Posted February 17, 2017 Share Posted February 17, 2017 There is a pressure relief valve in top left corner, they get brittle with age and then leak. Pig of a job to remove, usually having to be drilled out as they snap when you try to unscrew them. Link to comment Share on other sites More sharing options...
harry the horse Posted March 18, 2017 Author Share Posted March 18, 2017 At the recent NEC show I asked Truma about this problem. A technician called John explained the water was coming from the drip tray that sits below the boiler. I explained that I'd inspected the boiler by taking the robust plastic top cover off. I could see no frost damage (dimpled markings on the top). I do drain down in severe weather. He suggested I remove the outside cowl (6 screws) & poke some robust flexible wire up the tray drain pipe to clear any debris. A quick wiggle, job done! It worked & am delighted! Ps I was quoted up to 1k by some dealers to rectify Link to comment Share on other sites More sharing options...
paulmold Posted March 18, 2017 Share Posted March 18, 2017 Just realised that my post above is total rubbish. All I said relates to a Carver heater not a Truma, apologies. Link to comment Share on other sites More sharing options...
AlanS Posted March 18, 2017 Share Posted March 18, 2017 harry the horse - 2017-02-17 5:51 PM What causes water to drip from the heater cowl on the outside of my van. I can see a metal overflow pipe it's coming from that. Thanks H Are you talking about the heater exhaust/air inlet on the side of your MH ? This 'cowl' is the same as a balanced flue on your gas boiler at home and when running on gas an amount of water vapour in the exhaust from the heater will condense to form water droplets that come from this 'cowl' and it is more prevalent when the external temperatures are cold. Alan Link to comment Share on other sites More sharing options...
Derek Uzzell Posted March 19, 2017 Share Posted March 19, 2017 The Truma “Ultrastore Raid” boiler does not have an overflow-pipe. It does, however, have a condensation-pipe that (as Harry says) drains the boiler’s drip-tray to the outside of the leisure-vehicle. The condensation-pipe emerges through a hole below the boiler’s intake/exhaust and is numbered “7” in the left-most drawing on Page 9 of this Truma document: https://dealernew.truma.com/_anweisungen/Truma_Katalog/pdf_verzeichnis/70_000/70020_85200.pdf Link to comment Share on other sites More sharing options...
harry the horse Posted March 19, 2017 Author Share Posted March 19, 2017 Yes it is a condensation pipe, I have the same drawing. All is well, & thanks all for contributing to my problem. I hope it helps others. That's what this forum is all about! H T H Link to comment Share on other sites More sharing options...
keninpalamos Posted March 21, 2017 Share Posted March 21, 2017 paulmold - 2017-03-18 4:09 PM Just realised that my post above is total rubbish. All I said relates to a Carver heater not a Truma, apologies. :D :D :D :$ comes to us all.....eventually Link to comment Share on other sites More sharing options...
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