SHURFLO Trail King (LS204) mysterious overflow pipe help please.

[John and Jo]

Hi,

When I run the pump all is fine but as soon as it stops I get a good run of water coming out of some kinda overflow pipe from under the van, Its not from the drain off pipe, there are a group of three and its coming from that. The tank can be 1/2 full and it will still happen. Van is a Dethleffs Globetrotter.

Anyone know what might be the cause of this?

Thanks.

 

[tonyidle]

Usually a leaky Truma heater drain valve.

 

[John and Jo]

Cheers Tony,

I have the frost dump style and I have just triggered it, run for a bit and reset it. It seems to have stopped now. I don't see the connection from running the pump, it stopping and then it coning out the heater frost dump though.

 

[mitzimad]

the smaller pipe is usually the elbow on the top of the water heater it has a air admittance valve incorperated to allow air to enter when you drain via the other valve