Forum Discussion

CMunrock's avatar
CMunrock
Explorer
Jun 20, 2014

Draining My Fresh Tanks?

Another newbie question: Im in the process of sanitizing my tanks and lines. I let the bleach sit in the tank for the recommended time, now I'm trying to drain the tanks.

I have two lines under the 5th wheel--a red and blue one toward the center and a blue one toward the back, closer to the tank. When I open them, even with a full fresh tank, they drain very slowly. The rear one just trickles.

I've turned on the pump and that helps, but I don't want to burn up the pump draining the tanks.

Any advice? Shouldn't the blue one toward the back be running wide open, since the tank is near it?

It's a 56 gallon tank, so it will take forever to drain at this rate. Appreciate any input.

13 Replies

  • Each manufacture is different but in general there are two low point drains normally close together and a third drain by the fresh water tank. Ours drains real slow and will take several hours.

    It might help is you give the name of your RV so maybe others with the same brand could give you a more exact answer.
  • those sound like the low-point drains, you should have a separate drain valve for the fresh water tank itself. My last trailer had a large 2" knife valve just like the holding tanks drain except it was white. That drained the tank very fast.
  • Open a cold tap somewhere with the pump turned off perhaps?