Thor Forums

[gmc]

Originally Posted by Buzz102

We have a Hurricane S31 . Last night after snow storm, outside temperature dipped to 1 degree. All night RV furnace worked.In the morning water lines were safe and working. Hurricane heating system made enough heat in basement compartment to keep the temp above freezing but unfortunately we learned the hard way that there is no heating in the wet bay with the black and gray tanks. The gray tank seems to have frozen.

In the morning the grey tank handle was stuck. Temp is now above freezing and gray tank control valve moves well now but no water comes out. Black is OK; when I pull the valve it runs into the sewer hose.

Any ideas on how to prevent this happening with the gray tank? It would be nice if there was a furnace hose in that wet bay compartment as there is in fresh water compartment and other compartments. Barring that it would be nice for Thor to advise the customer sewer compartments does not have heating like others compartments.

Would it be a good idea to dump some pink antifreeze in the sink for Grey water holding tank in very freezing weather?

Best solution for gray - if connected to sewer - is to leave the valve open... Then no measurable water to freeze.
We leave ours open except the day before dumping black (collect some water to flush the hose...)

If not connected - even with heated pads on the tanks - the drain pipe/valve is exposed to freezing. Antifreeze can help - but would add just after dumping to insure it starts in the value/drain pipe area - and remember it will get diluted as the tank fills.

Black can be more challenging - as don't want to leave that valve open... but sounds like you didn't have an issue there...