RV News RVBusiness 2021 Top 10 RVs of the Year, plus 56 additional debuts and must-see units → ×

Thread Tools Search this Thread Display Modes
Old 03-10-2019, 05:03 PM   #1
Winnebago Owner
Join Date: Feb 2003
Location: Clermont, FL
Posts: 73
Replacing check valve on '07 38T water heater

I have low water pressure on the hot side and suspect a bad check valve somewhere. It seems that I cannot get to the rear of the water heater, anybody know how I will change the check valve without pulling the water heater if it is in the rear? I see what looks like 2 check valves on the pump lines beneath the water heater. Are they the only ones? I thought there might be one in back on the line leaving the water heater.
Attached Thumbnails
Click image for larger version

Name:	pump.png
Views:	83
Size:	159.9 KB
ID:	171252  
PORCHDOG is offline   Reply With Quote
Old 03-15-2019, 12:38 PM   #2
Winnebago Camper
Join Date: Dec 2018
Posts: 18
No answer to your question now but I'm going to follow this. When our Adventurer 32v was winterized last year a check valve was replaced. Didn't have tune to study it before storage. But soon hopefully (it has been a long cold winter here in Kansas) we will have Wibad home and I will be able look closer at the water system. The Winnebago schematics are very helpful.
Skipperphil is offline   Reply With Quote
Old 03-15-2019, 03:04 PM   #3
Site Team
creativepart's Avatar
Join Date: Sep 2009
Location: Spring Branch, TX
Posts: 3,021
Not sure on the 38T - but on some models with this water heater you can access the rear of the WH from under the RV. Slide under right at the water heater and see if there is an access panel or just plain access to behind from underneath.

The person that told me this said that there is a "reset" button on the back and engine radiator hoses from the engine to the back of the WH for the "Motoradd" feature. So, they had to make access to the rear possible. I never checked mine (37F) to see if that's true.

If you've already tried this and found no access I'm sorry I can't be of more help. Though in general I've been told by others that it's not that difficult to remove the WH.

If that's true or not I can't substantiate. I had some issues with my WH but was able to make all the fixes from the front side.
2017 Winnebago Adventurer 37F
2016 Lincoln MKX Toad
creativepart is offline   Reply With Quote
Old 03-15-2019, 06:35 PM   #4
Winnebago Owner
Americanrascal's Avatar
Join Date: Dec 2013
Location: West Georgia
Posts: 210
X2 on what creativepart advises. I have a check valve issue behind my water heater related to my bypass and need to get to it for replacement on our 38Q. I crawled under the rig and found the access panel. Does not look like an enjoyable job getting to it and off, but is likely doable. Will attack mine in a few weeks. Fingers crossed getting the panel off. Not made for old geezers like me. Good luck on yours.
Joe a/k/a "Americanrascal"
2016 Winnebago Adventurer 38Q +tow dolly
8th RV to sit in our driveway in 35 years
Americanrascal is offline   Reply With Quote
Old 03-20-2019, 07:36 PM   #5
Winnebago Watcher
Join Date: Mar 2019
Posts: 1
07 38T water Heater

To change the water heater check valve you need to remove the white divider panel on the left side of the water heater as you look at it. Then crawl into the little space and go behind the water heater. The one way check valve may then be gotten to. good luck
kraftyplace is offline   Reply With Quote
Old 03-20-2019, 07:59 PM   #6
Winnebago Owner
Join Date: Feb 2003
Location: Clermont, FL
Posts: 73
I am proud to report that I have changed the check valve! Wasn't an easy job but it is doable from the compartment. Being right handed was no help either. I pulled 2 panels between the HWH and the compartment, drilling out the pop-rivets that hold the pipes to the panel. The 3 valve handles pull off with the help of a screwdriver. I then crawled into the compartment and disconnected the fitting that is attached to the CV behind the WH. I put a deep socket on the CV and used a LONG breaker bar. All with my left hand. I replaced it and reassembled in reverse order. The CV was only $10 so I replaced it but the old one didn't have trash in it as I suspected. The sound stopped that I was hearing when the water flowed so that must have been the CV. Now I will see if I have more water pressure in the shower. I will be sore in the AM from all the twisting and turning. Thanks for your comments.
Attached Thumbnails
Click image for larger version

Name:	IMG_0049.jpg
Views:	63
Size:	136.6 KB
ID:	171291   Click image for larger version

Name:	IMG_0051 (2).jpg
Views:	58
Size:	241.0 KB
ID:	171292  

PORCHDOG is offline   Reply With Quote
Old 03-20-2019, 10:29 PM   #7
Winnebago Camper
TigeDuner's Avatar
Join Date: Oct 2007
Location: Tucson, Arizona
Posts: 41
I have a 2002 Adventurer 35U and I was able to access the back of the water heater from the forward compartment without removing any panels. Make sure you check the system under pressure for leaks. The brass check valve is tougher than the plastic fittings and they may crack if you tighten them too much.
2002 Winnebago Adventurer 35U Ford V10
TigeDuner is offline   Reply With Quote

heat, heater, 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
Atwood water heater check valve location & purchases source wagonmaster2 Plumbing | Systems and Fixtures 20 11-22-2013 04:30 PM
Water heater check valve smlranger Plumbing | Systems and Fixtures 9 03-16-2010 01:47 AM
Water Heater Check Valve Replacement Dean Nelson Plumbing | Systems and Fixtures 6 04-19-2007 11:36 AM
Water heater check valve Captain Bud Plumbing | Systems and Fixtures 11 03-27-2006 02:42 AM
Atwood water heater check valve Stumpjumper Plumbing | Systems and Fixtures 13 07-05-2005 11:49 AM

» Featured Campgrounds

Reviews provided by


This website is not affiliated with or endorsed by Winnebago Industries or any of its affiliates. This is an independent, unofficial site.

All times are GMT -6. The time now is 07:35 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.