Water keeps dumping!!!! (1 Viewer)

[Gingernuts]

I have a 2013 possl 2win which is similar to globecar pvc’s!
I have a gas powered heater and water heater (Truma combi4) just recently it keeps dumping the water from the heater through the frost protection valve! This wouldn’t be too bad if it didn’t dump the complete water tank contents overboard too!
Is there anything I can do to stop it dumping the water, in freezing conditions I can understand it happening, but not in + temps!?
Alex fae Perth

 

[999RAR]

I think they will dump at anything below 4 degrees.

 

[Vanman]

Have you turned the blue valve on the top 90 degrees to close it when you push in the reset button?

I leave my boiler on 'frost guard' 5c this time of year to keep all good. You can cheat the switch but you risk breaking your boiler.

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[Gingernuts]

Yes guys I know how it works but it has dumped at +7 before leaving me no water for brekkie tea or teeth brushing! I now Carry a 5litre big bottle of shop bought water for just in case! I thought it was electric AND gas but it’s gas only
So if it’s not cold enough to have the heating on why is it dumping the water?

 

[Razamataz]

Fit a clothes peg to it

 

[Lenny HB]

Sounds like the dump valve is faulty, they should dump a 3° & below but won't reset until up to 5/6°.
Temporarily you could wedge a piece of timber against the button or a small block of timber held in place with a cable tie.

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[Howard B]

I fitted a Truma heat element to my dump valve.

 

[Gingernuts]

Thanks Lenny
Hugoman

 

[Gingernuts]

I fitted a Truma heat element to my dump valve.

Tell me more please!

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[Howard B]

Tell me more please!

Do a search
Truma frost control element.

 

[The Old Man]

Do you switch your water pump off at night?

If my valve drops and the pump is off, only the boiler tank empties and the main fresh water tank holds on to its contents.

A clothes peg around the valve keeps mine closed but that of course endangers your boiler. I spent four days below freezing a week ago, I considered the risk was to high to peg the valve, so even though I wasn't cold it did mean running the heating and hot water just to keep the boiler tank warm.

A good burn before turning in was a good move, turning the water pump off and being alert to the van temperature all worked.

With my van design I can operate the boiler controls from in bed, so if Iwoke in the night I could have a shot burn if I felt it was necessary.

 

[Lenny HB]

Fit a clothes peg to it

Thats impossible only works on the old electric valves the mechanical ones that have been fitted for years have a button that has to be held in.

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[Gingernuts]

So Google this heater element thing and it’s only to be used when the heater is ON!!!!!!!!!

 

[Howard B]

So Google this heater element thing and it’s only to be used when the heater is ON!!!!!!!!!

Not sure what the !!!!!!! are all about. I have my hot water heater on all the time when the van is in use. The Truma powers the heater element. Dont need it on at other times

 

[Gingernuts]

If the heater is on why would I need a dump valve heater?

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[cyberyacht]

Is your main tank also draining because the pump is on and trying to refill the Truma?

 

[Howard B]

If the heater is on why would I need a dump valve.

Is the valve dumping when the heater & hot water are on or just parked on your drive?

 

[Brains]

A hot water bottle is the solution.

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[Lenny HB]

If the heater is on why would I need a dump valve heater?

It's for a Combi it's on all the time the Combi has power.
No good for an Alde system.

 

[Gingernuts]

A hot water bottle is the solution.

Ooh there’s a thought!

 

[Gingernuts]

Is the valve dumping when the heater & hot water are on or just parked on your drive?

When parked, either on the drive or wild camping

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[Howard B]

When parked, either on the drive or wild camping

You didnt answer the question. is the heater & hot water on.

 

[Gingernuts]

No

 

[dunnah01]

Bodge it - bend the end of the overflow pipe under the van and clamp it with a cable tie and then try the valve a few times to see if you can figure out why it's tripping at higher temps

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[Reallyretired]

If my hot tank drains it also drains the cold tank even with the pump off presumably by siphon action. My last motorhome didn't do this .

 

[Gingernuts]

If my hot tank drains it also drains the cold tank even with the pump off presumably by siphon action. My last motorhome didn't do this .

Thanks mate that’s what’s happening to mine. What motorhome have you got?
Alex

 

[Howard B]

No

Ok it sounds like the valve is doing its job then.
If it were me i would drain down when parked on the drive if temps are heading towards zero. It will dump above at temps just above zero.
If using the van keep boiler & heater on overnight. That might stop it dumping depending on how warm the area is around the valve. On my Adria Twin it didn't get warm enough hence i fitted the heater element.