Forum Discussion

coolmom42's avatar
coolmom42
Explorer II
Oct 31, 2020

How cold is too cold?

With a water tank above the floor/under the bed, and adjacent water pump, what is the most vulnerable freeze point? (Assuming waste tanks are empty or nearly so.)

Our forecast for Sunday and Monday is 55/30 & 53/33 F, sunny.

I'm inclined to put some heat on in the RV, and open drawers and doors so the plumbing can get some warm air circulated to it. That was adequate for a trailer with exposed water tank, under the same conditions, so it should be adequate for the motorhome. Any reason it wouldn't be?

The furnace is basic unducted. I'm assuming no heated air is directed under the bed, towards the water tank and pump. Is that correct?

25 Replies

  • coolmom42 wrote:
    Our forecast for Sunday and Monday is 55/30 & 53/33 F, sunny.
    No worries. Go have some fun.
  • Thirty is my “concerned” point but that’s your low. IMO you’ll be fine. Do you have an outside shower? How exposed are your drains?
  • Ed_Gee wrote:
    Coolmom, I have been doing this for years without any problems. I use a small electric heater on in the RV set to come on around 50-55 degrees F. Never a problem. I might get concerned if temps get down below 25 or so.....but that is rare on the Oregon coast.... and I would just turn the heat inside up higher.....or maybe drain the water system.


    I'm pretty sure that's adequate. Just not familiar with this tank arrangement!

    We have a long string of milder weather and I'm hoping to make a quick trip before it goes away!
  • Coolmom, I have been doing this for years without any problems. I use a small electric heater on in the RV set to come on around 50-55 degrees F. Never a problem. I might get concerned if temps get down below 25 or so.....but that is rare on the Oregon coast.... and I would just turn the heat inside up higher.....or maybe drain the water system.