Jayco RV Owners Forum
 


Reply
 
Thread Tools Display Modes
 
Old 08-17-2016, 06:29 AM   #1
Senior Member
 
RVhiker's Avatar
 
Join Date: Dec 2010
Posts: 1,240
Overflow Valves

My trailer has two fresh water tanks and two overflow hoses that exit out the bottom of the Coroplast bottom. I believe that the purpose of the overflow hoses is to prevent overfilling the tanks and causing them to possibly burst. A problem is that when the tanks are filled, and streams of water are exiting through the overflow hoses, that it seems like the "overflow" lasts far longer than any need to stop overfilling; once filled, we have lost as much as one-third of our water supply on the way to a camping site. This excess "overflow" draining is thought to be by caused by siphoning, or by the trailer not being level on the way to a camping site.

I installed small valves in the end of my two siphon hoses. Obviously when filling tanks these valves need to be open, to prevent over-filling. The question: When is the time to close those valves, to prevent the siphoning action?
__________________

__________________
There's lots of advice and information in forums... sometimes it is correct. For example, all of my posts are made by a political appointee who got the job as a reward for contributions to my diesel bill.

2011 Jayco 28.5RLS; 2008 Chevy Duramax; Pullrite Superglide Hitch

RVhiker is offline   Reply With Quote
Old 08-17-2016, 07:30 AM   #2
Senior Member
 
Seann45's Avatar
 
Join Date: Jun 2010
Location: Saskatoon Sask Canada
Posts: 9,697
As soon as the tubes start draining shut off the water input then shut off the valve on the tubes..
__________________

__________________
Seann
2004 Chev Silverado Duramax optioned past the max. 2009 Jayco Eagle 308 RLS 765 watts of solar, 6-6 volt batteries (696 amp hour), 2000 watt (4000 surge) whole house inverter.
132 days boondocking in 2017
215/2016, 211/2015, 196/14, 247/13, 193/12

Seann45 is offline   Reply With Quote
Old 08-17-2016, 08:48 AM   #3
Senior Member
 
Join Date: Feb 2012
Posts: 923
Here is what I do with mine.

When to have valves open and why to have them open:
1. When filling, because as the water goes in, the overflow tubes act as a vent to let the air in the tank out. If you have them closed when filling, you can balloon your tanks. This is especially true with a two-tank set up, as the second tank likely has no other vent other than the overflow tube.
2. When set up at your campsite and actively using your FW. Again, the overflow tubes act as an air vent and let air into the tanks as you draw water out. If you just stop along your route while travelling to use the toilet for a flush or two, or run a bit of water, it is OK to leave the valves closed...no harm there, but once you set up camp, open them up.
3. When draining your FW tanks through your FW tank drain - again to let air in as water comes out.

When to have the overflow valves closed and why:
1. When you are done filling, to prevent the siphoning effect.
2. When travelling to prevent the slosh out the overflow tubes effect.
dewey02 is offline   Reply With Quote
Old 08-17-2016, 02:16 PM   #4
Senior Member
 
RVhiker's Avatar
 
Join Date: Dec 2010
Posts: 1,240
My thanks to Seann45 and dewey2; both answers helped.
__________________
There's lots of advice and information in forums... sometimes it is correct. For example, all of my posts are made by a political appointee who got the job as a reward for contributions to my diesel bill.

2011 Jayco 28.5RLS; 2008 Chevy Duramax; Pullrite Superglide Hitch

RVhiker is offline   Reply With Quote
Old 08-17-2016, 02:28 PM   #5
Senior Member
 
Join Date: Dec 2012
Location: Southern Indiana
Posts: 1,312
RVhiker, dewey02, can you briefly describe what valves you used, where you purchased them and how they're fastened to the overflow tubes. I really need to do this. I know there's a few threads on this and I'm just being lazy by not doing a Forum search. Thanks, Terry
__________________
2012 Eagle 320 RLDS
2012 Ford F-250 Crew Cab FX4, 6.7l PSD
3.55 E-locker, Timbrens
TCNashville is offline   Reply With Quote
Old 08-17-2016, 03:06 PM   #6
Senior Member
 
RVhiker's Avatar
 
Join Date: Dec 2010
Posts: 1,240
I bought a couple of 1/2 inch plastic ball valves - designed for use with PEX piping - at Home Depot. The overflows were 1/2 inch vinyl hose. A 1/2 inch stainless steel PEX clamp ring barely fit onto the end of each hose. I inserted the valve into the hose, and collapsed the clamp with a standard PEX stainless steel clamp tool.

You might be able to use a small screw clamp - like used on a radiator hose - instead of the PEX clamp but I don't think it would work as well.
__________________
There's lots of advice and information in forums... sometimes it is correct. For example, all of my posts are made by a political appointee who got the job as a reward for contributions to my diesel bill.

2011 Jayco 28.5RLS; 2008 Chevy Duramax; Pullrite Superglide Hitch

RVhiker is offline   Reply With Quote
Old 08-17-2016, 05:34 PM   #7
Senior Member
 
Join Date: Feb 2012
Posts: 923
Quote:
Originally Posted by TCNASHVILLE View Post
RVhiker, dewey02, can you briefly describe what valves you used, where you purchased them and how they're fastened to the overflow tubes. I really need to do this. I know there's a few threads on this and I'm just being lazy by not doing a Forum search. Thanks, Terry
I did something a bit different than RVHiker.
I have twin FW tanks, therefore I have two overflow tubes.
I connected both of those tubes to a larger hose and then ran that hose out to near my FW drain hoses. Then I inserted a standard RV type water valve, so I only have to open/close one valve to control both overflow tubes.
__________________

dewey02 is offline   Reply With Quote
Reply

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 State Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -6. The time now is 05:51 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright 2002-2016 Social Knowledge, LLC All Rights Reserved.