Thread Tools Display Modes
Old 09-16-2012, 07:44 PM   #1
Junior Member
Join Date: Jun 2012
Posts: 11
Exclamation Hooking up Suburban water heater - User Error

I bought a suburban water heater to replace the one that someone had screwed a boat plug into the anode prior to me purchasing (thanks for helping me out w/ that one, wouldn't have figured out).
Now I have a different issue, water fills for a few minutes then sprays out the back of the tank. The PEX tubes are not cracked.

There was two adapters I took from the old tank. I was 99.7% sure I did not mix them up (not that it means anything, the old tank was shot anyway).
I put the adapters in the new tanks with the one with the valve (see photo) in the hot water (top of tank) so that water could come out, but not backflow.
I've attached the setup, there is a bypass valve at the bottom T intersection above the blue towel (see photo) but not at the top T.

Any help would be appreciated, assume I'm a moron because clearly I missed something because it doesn't work. I've probably missed the obvious somewhere.
Attached Thumbnails
Click image for larger version

Name:	4.jpg
Views:	52
Size:	40.9 KB
ID:	19564   Click image for larger version

Name:	2.jpg
Views:	53
Size:	45.9 KB
ID:	19565  

Tailspin is offline   Reply With Quote
Old 09-16-2012, 07:53 PM   #2
Site Team - Lou
Herk7769's Avatar
Join Date: Oct 2009
Location: South Eastern PA
Posts: 19,834
Is the top check valve installed properly?

It is supposed to let water flow from the tank INTO the PEX and not allow water in the PEX to enter the tank from the top.

The bottom attachment is the open one. The T valve controls where the water is supposed to go (into the bottom of the tank OR up the cross tube into the hot water outlet PEX).


Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
Herk7769 is offline   Reply With Quote
Old 09-16-2012, 07:59 PM   #3
Junior Member
Join Date: Jun 2012
Posts: 11
Yes, that is the way I installed it by looking at the old one.
Is it possible that it could have been airlocked or something?

When I connected the watersource to the RV it filled for a few minutes without issue then boom. Its just a garden hose type hookup, so the pressure shouldn't have been an issue or anything.
Tailspin is offline   Reply With Quote
Old 09-16-2012, 08:45 PM   #4
Junior Member
Join Date: Jun 2012
Posts: 11
Ok, connected it back up, think I found the issue. This elbow is loose no matter how tight the connection to the tank gets. Somehow it must be broken or missing a seal from when I took out the rusted one.
Attached Thumbnails
Click image for larger version

Name:	5.jpg
Views:	42
Size:	46.1 KB
ID:	19571  
Tailspin is offline   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 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 06:38 PM.