RV Trip Planning Discussions

Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > Tiffin Motorhomes Owners Forum
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 12-06-2017, 03:21 PM   #1
Senior Member
 
Join Date: Mar 2011
Posts: 207
Valve to By Pass Water Heater

Is it possible for my bypass valve to actually not work? It's a simple 90-degree valve. When its set to bypass it still fills my tank with RV antifreeze when I am winterizing. Could I have backflow valve or something else that would allow the tank to fill? I have not taken off the panel to see how Tiffin plumbed the tank. I used about 5 gallons and finally gave up!

2010 Tiffin RED
__________________

__________________
Deas
Tiffin RED 34
deasnealy is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 12-06-2017, 03:35 PM   #2
Senior Member
 
dennis45's Avatar
 
Join Date: Jun 2012
Location: BC
Posts: 7,402
Quote:
Originally Posted by deasnealy View Post
Is it possible for my bypass valve to actually not work? It's a simple 90-degree valve. When its set to bypass it still fills my tank with RV antifreeze when I am winterizing. Could I have backflow valve or something else that would allow the tank to fill? I have not taken off the panel to see how Tiffin plumbed the tank. I used about 5 gallons and finally gave up!

2010 Tiffin RED
There is, to my knowledge, usually at least two valves to bypass the heater. Without the checkvalve there are three.
Attached Thumbnails
Click image for larger version

Name:	IMG_0641.JPG
Views:	57
Size:	35.2 KB
ID:	184922  
__________________

__________________
2019 Unity LTV CB, pushed by a 2013 Honda CRV, BlueOx Baseplate, Aventa Bar & Patriot Brake
dennis45 is offline   Reply With Quote
Old 12-06-2017, 03:53 PM   #3
Senior Member
 
allegro1x's Avatar
 
Join Date: Feb 2014
Location: Georgia
Posts: 913
i had mine stick last year and the rv tech did something, when I wasn't watching and I couldn't get him to tell me what he did. I only lost about a gal. before I stopped. I would call a local rv tech. Dave
__________________
Tiffin 32CA 2012
2007 Jeep Liberty
Sophie- old chihuahua girl+Ruby and Raisin- young shih tzu/ part poodle sisters
allegro1x is offline   Reply With Quote
Old 12-06-2017, 04:15 PM   #4
Senior Member
 
dennis45's Avatar
 
Join Date: Jun 2012
Location: BC
Posts: 7,402
Quote:
Originally Posted by dennis45 View Post
There is, to my knowledge, usually at least two valves to bypass the heater. Without the checkvalve there are three.
Or, you may have a three way valve like this in which case you need to find the right position. What does your manual say? Click image for larger version

Name:	image2.jpg
Views:	45
Size:	15.2 KB
ID:	184939
__________________
2019 Unity LTV CB, pushed by a 2013 Honda CRV, BlueOx Baseplate, Aventa Bar & Patriot Brake
dennis45 is offline   Reply With Quote
Old 12-06-2017, 05:35 PM   #5
Senior Member
 
Join Date: Mar 2011
Posts: 207
Its a single valve located in the wet bay. Simple turn it to bypass. Its only a 90 degree turn.
__________________
Deas
Tiffin RED 34
deasnealy is offline   Reply With Quote
Old 12-06-2017, 05:36 PM   #6
Senior Member
 
Join Date: Mar 2011
Posts: 207
It says turn the bypass valve to bypass before you winterize.
__________________
Deas
Tiffin RED 34
deasnealy is offline   Reply With Quote
Old 12-08-2017, 08:31 AM   #7
Senior Member
 
Mike8253's Avatar
 
Tiffin Owners Club
Ford Super Duty Owner
Join Date: May 2015
Posts: 195
It's conceivable that the internal valve can fail or somehow be disengaged from the valve handle. I'm not 100% sure, but imagine it's replaceable, just have to order one from Tiffin if you are inclined to do the work yourself.
__________________
Mike and Cindy
2016 Tiffin Allegro 34 PA
2010 Pontiac G6
Mike8253 is offline   Reply With Quote
Old 12-08-2017, 08:35 AM   #8
Senior Member
 
bob caldwell's Avatar


 
Join Date: May 2017
Location: Vancouver Wash
Posts: 4,297
HD or Lowes carry ball valves and Shark Bite fittings
__________________
2010 Rockwood Sig Ultra lite 5er 8280......'99 Ram 2500, Cummins. 4x4.....Pullrite Superglide.......Use to work in calender factory.....got fired for tak'n a few days off.....
bob caldwell is offline   Reply With Quote
Old 12-08-2017, 08:42 AM   #9
Senior Member
 
Join Date: Aug 2013
Posts: 215
Single valve bypass systems depend on a check valve on the hot water outlet side. These are known to fail, and replacements run less than $10.
__________________
Russ & Paula, Portland, OR. The Beagle Belle.
2016 Ram Laramie 3500 DRW 14,000# GVWR.
2001 Dodge 2500 4X4, 5.9 CTD 5 speed, 3.55 gears, Pacbrake PRXB, DS Power Puck, 313K.
Rhagfo is offline   Reply With Quote
Old 12-09-2017, 09:13 AM   #10
Senior Member
 
Tiffin Owners Club
Winnebago Owners Club
Join Date: Feb 2012
Location: Las Cruces, NM
Posts: 3,250
There is a check valve mounted behind the water heater. These are known to fail or get plugged up so I suggest you start there. The wet bay mounted valve is very unlikely to fail and is really hard to get to.

You should be able to retrieve some of that antifreeze by putting a pan under your low point hot water drain and opening the pressure valve on the water heater.
__________________
Roger & Mary
2017 Winnebago Navion 24V
2014 Tiffin Phaeton 36GH (Sold)
luvlabs is offline   Reply With Quote
Old 12-09-2017, 10:22 AM   #11
Senior Member
 
Join Date: Nov 2015
Posts: 8,027
Basically three things can be at issue
*Bypass valve doesn't fully swap (open) so some flow is still going in thru cold inlet
*Bypass handle is stripped and doesn't even move valve so flow is still going in thru cold inlet
*Check valve in the nipple screwed into tank at top (hot outlet) is not closing and flow is going back into WH Tank
__________________
Is it time for YOUR medication or MINE
2007 Dodge 3500 w/Tractor Motor & NUWA 5vr
US NAVY---USS Decatur DDG-31
Old-Biscuit is offline   Reply With Quote
Old 12-13-2017, 01:18 PM   #12
Member
 
harleybill's Avatar
 
Tiffin Owners Club
Join Date: Feb 2016
Posts: 30
It might be the check valve. Last winter my check valve went bad and would not allow hot water to flow. I checked a few stores around the places we were staying, and no one had a replacement. I took a screw driver and rammed the guts of the valve, and I reinstalled it to allow the hot water to flow. I live it my rig full time, so I do not have to winterize. I was not going to replace the valve. This summer I was at Red Bay, and I replaced the valve in case I sell the rig and some one wanted to winterize. It was a plastic valve, so I would probably check that first.
__________________

__________________
Bill & Debbie Lees
https://TheTumbleLees.me
2010 Tiffin 40' QTH 2013 Cadillac SRX
harleybill is offline   Reply With Quote
Reply

Tags
heat, heater, valve, water, water heater



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
Pass side bay access panel to gas & water heater & waste/water tanks calflyer Travel Supreme Owner's Forum 2 06-06-2017 06:19 AM
Grants Pass KOA in Grants Pass, OR cimolifam Camping Locations, Plans & Trip Reports 1 06-13-2016 08:17 PM
Rockwood Mini-lite 2104s water heater by pass valve location Guidosar Travel Trailer Discussion 4 04-26-2016 10:07 PM
Jacksonville, to by-pass or not to by-pass SteadyEddy Navigation, Routes & Roads 28 10-06-2014 08:07 AM
Water Heater By-pass Valve Didn't AA4WP Winnebago Industries Owner's Forum 15 12-13-2008 01:34 PM

» Featured Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 02:42 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.