Reply
 
Thread Tools Search this Thread Display Modes
 
Old 03-21-2016, 11:28 PM   #1
1 Rivet Member
 
1972 27' Overlander
Templeton , California
Join Date: Oct 2015
Posts: 6
Fresh water to grey water in Overlander

1972 27' Overlander Twin

I'm assuming a tank is a tank.? I'd like to move my rear bath to mid trailer but of course the biggest issue there would be drainage. Since the existing fresh water tank would only be a few ribs away, is there a reason why it wouldn't work? Fresh water storage could always be added above the floor.

One big benefit of this arrangement would be taking some weight off of the rear of the trailer by removing the original black water tank. This would help alleviate the rear end separation issue with these models.

Has anyone done this yet?
__________________

__________________
ryry is offline   Reply With Quote
Old 03-22-2016, 12:09 AM   #2
Figment of My Imagination
 
Protagonist's Avatar
 
2012 Interstate Coach
From All Over , More Than Anywhere Else
Join Date: Dec 2011
Posts: 10,321
Quote:
Originally Posted by ryry View Post
Since the existing fresh water tank would only be a few ribs away, is there a reason why it wouldn't work?
Let's see…
  • The existing fresh tank doesn't have a dump valve.
  • When you add a dump valve, the existing vent will be too small; it needs to be large enough to let air in as fast as the water flows out. But you might repurpose the existing fresh tank fill to serve as a vent, with a modest amount of work, including extending and rerouting it through the roof; you could leave it where it is, but then you might have an ongoing odor problem. Through the roof is better.
  • Also when you add the dump valve, you have to make sure the dump valve exits forward or rearward of your wheels; a fill port could be over the wheel well, but a dump valve can't. I don't know exactly where the fresh tank is on your particular trailer, so that may or may not be an issue for you.
  • Wherever you move the new fresh tank, you'll need a wall penetration for a new fresh tank fill.
  • You will also need to provide additional support for the new fresh tank.
  • You'll also need to relocate the fresh water pump so that you minimize the amount of suction needed to self-prime.
  • You may also need to relocate your municipal water intake, or at least run a new pipe from the existing fill to the new tank so it can be teed in near the relocated pump.
  • You will alter the balance on the trailer. Moving the rear bath forward adds tongue weight because the whole center of gravity shifts forward.
  • You may even end up altering the weight distribution on your trailer tires. Under ideal loading condition, if you were to put scales under all four wheels, then the load on each wheel should be almost the same. By shifting the bathroom weight and gray tank weight forward, you're adding load to the front wheels and taking it off the rear wheels. Which will have an effect on tire wear as well as braking effort per wheel.
None of these points is insurmountable. You could do it. But I guess the point I'm trying to make is, you can't look at the tank location in isolation, but instead have to look at it as part of the overall system. If you're committed to relocating the bathroom, then putting a gray tank where the fresh tank is now is as good a place as any, as long as you keep the other points in mind.
__________________
WBCCI #1105
TAC LA-4

My Google-Fu is strong today.
Protagonist is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Replacing black/grey with a larger grey whitney Waste Systems, Tanks & Totes 11 05-08-2012 07:47 PM
Grey Water Tank Flushes Toilet (to conserve fresh water) LittleRadio Sinks, Showers & Toilets 8 03-28-2011 11:10 AM
Converting fresh water tank to grey possible??? Minno Waste Systems, Tanks & Totes 10 10-20-2009 07:59 AM
Ratio of Fresh Water/Grey Water Tank, Help! erikjware Waste Systems, Tanks & Totes 1 05-08-2008 11:42 AM
Fresh Water Tank to Grey + Shower Pump? foshejh Fresh Water Systems 7 12-08-2005 10:22 AM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 03:18 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.