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jeff wenzel · Guest

Hi, The safety/relief/drain valve [the one with the lever on it on floor adjacent to hot water system] constantly overflows while connected to the mais supply, I am wanting to find out if this valve limits the water pressure or is limited at the point I connect the hose to on side of van.I am thinking it is overflowing due to high pressure and I am assuming the pressure would be reduced somewhere.Hope someone can help. Thanks Jeff

geistriders · First Geist Owner

Hi Jeff,

My understanding is that the red valve is the pressure relief valve for the HWS. In fact I have replaced mine once because it was allowing too much water to escape, to the point where it was effecting the performance of the HWS.
The new valve also allows a very small amount of water to escape, but I am told that it is better that way, than for the valve not to be working. I guess it is only natural for the water to expand as it is heated and thus the need for the pressure relief.
The main reason that they leak is from overpressure or a small impurity being trapped in the seat of the valve after it has opened. For this reason I have a water pressure limiting valve which I fit to the tap at the mains supply: This restricts the water pressure to the van and has an inbuilt filter. There is a pressure limiter built into the van (I believe), but my system lowers the pressure befor it gets into the van - also helps the hose connections when operating in areas where there are surges in water pressure.
Should you need a new valve then Ansu Leisure does have them in stock.
Hope this is of some help.
Regards

Geoff

Get-A-Life · Captain

There is a pressure limiter in the hose connection to the van.

I think from memory that it is of a Colorado brand.

I have had to replace mine, which was done under warranty.

Another van owner I know of by-passed the pressure limiter when it became faulty and destroyed the mixer taps.

KenM

GeistRunner · Administrator

If the water is streaming out only under mains pressure then the pressure valve into the van (Colorado) could be defective or on its way out.

GR

mhquay · Batsman

I had this problem a couple of years ago. I think the pressure reducer at the connection point was probably to blame but simply put a 25 psi reducer in the water hose about a metre from the connection point on the van. Problem fixed.
Phil

denis hull · Guest

Hi

I've just read your replies and comments. My red pressure relief valve has begun to drip too. I cant find a pressure reducer in my van ,535, unlees it is either in the connector on the van wall or the one way valve to stop backflow to the pump.

Ialso can't find one on line anywhere.
Any suggestions?

Denis

Joe Dennie · Captain

I have a blue pressure reducer just inside under the bed where the external water is connected. If you set the water temp too high the relief valve will leek as designed.

Guest

If your valve has Red lever- Change for one with Yellow lever.
Full details on Truma Website.
Inlet point incorporates pressure reducer to 50psi little blue valve in pipework drops pressure to suit Truma.
Had similar problems in LV 485
Cheers Jim

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