Jump to content


Recommended Posts

My experience is the same as Kirk's. Between a small diameter drain and very little pressure (less than 1 psi for a 2' tall water tank, decreasing as the tank empties) they can take a very long time to drain out.  Not a quick process. 

Mark & Teri

2021 Grand Designs Imagine 2500RL, 2019 Ford F-350

Mark & Teri's Travels

Link to comment
Share on other sites

The straight gravity drains on many RV fresh water tanks with only perhaps  say a 1/2 or 3/8 line and an even smaller drain cock takes a longggggggggg time typically. One might turn on a faucet under pressure (via the fresh water tank and pump, not city) and let the fresh water exit into the gray holding tank then dump it  to speed up the process.

John T

Link to comment
Share on other sites

As others have said, every setup is different but I'm able to turn on my water pump with fresh water tank drain valve open and this greatly speeds up the process. Be sure not to run your pump dry as that's a sure way to ensure it's life prematurely. 

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

RVers Online University



RV Destinations

Find out more or sign up for Escapees RV'ers Bootcamp.

Advertise your product or service here.

RVTravel.com Logo

  • Create New...