Thread Tools Display Modes
Old 09-21-2016, 07:16 AM   #21
Senior Member
Join Date: Jan 2015
Posts: 419
I wouldn't worry too much about any left over water in the tank, so long as you drain the water out of the low point drain. This is what we did here in Kansas last winter and everything went well. Just make sure you run antifreeze through your plumbing, including your outdoor shower. Run some in your black/grey tanks, more so for the sake of the valves than the tank (should be empty).

2015 FR3 30DS
KansasFR3 is offline   Reply With Quote
Old 09-21-2016, 09:15 AM   #22
Kadiddle's Avatar
Join Date: Jan 2015
Location: Massachusetts
Posts: 85
A little more about the grey tank responding to some replies here. The story is actually a little longer than I originally posted. Hopefully some will like the additional detail.

Because my previous motorhome reported 1/3 grey full after only a little water was used, we ran a test to know exactly how many gallons triggered each light. So, with the new motorhome, ran the same test - just to know - no witch hunt. This is when I discovered the lower usable capacity.

The dealer had to repeat the test because FR would not believe my test. They got only a 1 gallon higher result, still well below 41 gallons. While doing their test, water leaked into the compartment behind the passenger rear wheels (what we call "Door #4). They immediately said the grey tank is leaking before checking any fittings and ordered a replacement. I got to explicitly measure that tank for it's dimensions. The tank was stamped 41 gallons and my calculations with assumptions on material thickness came in at 40.7 gallons.

I could not repeat the leak and refused to have my coach torn apart for a grey tank replacement without a definitive diagnosis OR to just get the same capacity back. So, my conclusion was the drain pipe insertion distance, which, one cannot examine without taking the pipes out of the tank. Maybe some day, especially if I get another leak, I'll take apart the bathroom/bedroom wall and disassemble/check the pipes (seal integrity and depth).

The grey tank capacity does not include anything else (e.g. water heater). As one cannot get their hands inside the tank, I can only imagine that the seal of a pipe to the tank is drill a hole, stick in the pipe, and use glue. If there is no specification of insertion distance (or it's ignored), the tank usable capacity will vary.

2015 FR3 30DS
2010 Ford Escape Toad
Kadiddle is offline   Reply With Quote
Old 09-21-2016, 11:12 AM   #23
Senior Member
wayne and sherry's Avatar
Join Date: Feb 2015
Posts: 580
I drain my water tank about 1/2 way before freeze up. That way there's room for ice expansion

wayne and sherry is online now   Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

» Virginia Campgrounds

Reviews provided by is not in any way associated with Forest River, Inc. or its associated RV manufacturing divisions.

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 03:44 PM.