Truma HWS relief / drain valve.

Hi Daz

Probably not much help but we had a similar problem with our Truma.
We were originally told we could hook it up to the mains if we kept the tap pressure down. We were not using a pressure limiter.

We subsequently found out this was incorrect and it was not to be hooked up to the mains at all. Our pressure valve had to be replaced.

The only thing I can suggest is that you try a replacement pressure limiter or only use your water from the tank.

Sorry I can't be of more help.

Regards
Rowdy

Gday daz

Just finished fixing my truma hot water unit with a very similar problem.It was leaking near the cold water inlet,the cold water inlet runs in with the electric element which has a rubber O ring for the seal and this had blown out with a whoosh one night, hence the hot water escapes.To fix just undo the two small nuts holding the element in and replace with a 32mmX2.8mm Oring not from the Caravan Repair shop at $15.95 .Hope this is of some use.

grime 54

G'day Daz.
The Temperature Pressure Relief (TPR) valve is there to protect the unit from excess
Temp or Press. There should be a metal tag on the TPR valve indicating the pressure and temperature limits, make sure the new valve has the same limits as the original, a higher rating will compromise the heater cylinder.
It is normal to have a small amount of hot water escape as the water heats up (expansion=pressure increase)
I have a different make of HWS and have not had any problems.

Barry

Hi all I think problem solvered.
After a bit more checking I found that the AMOS adjustable water pressure regulator ( I purchased this after buying the van) that fits to the water source had been tampered with. I put it all back together & reduced the water pressure & found the relief drain valve has ceased letting water go. I did contact the caravan builder who advised "I should advise you to purchase a pressure limiting valve 350 kpa and that should solve your problem"
Now I find out that most vans have these fitted which protects the hoses, John Guest fittings, & HWS in vans . My question to the van builder will be why this was not fitted at build time. The AMOS pressure regulator can be varied from 35 KPA to to 850 KPA. The local caravan shop in Esperance tells me that John Guest fittings & Truma HWS should never be subjected to water pressure over 350 KPA
Thanx to contributors, It is all a learning curve, with plenty of curve balls thrown Daz in Esperance but soon to be home in SA