Thread Tools Display Modes
Old 04-26-2015, 11:58 PM   #1
Senior Member
b1barnes's Avatar
Join Date: Aug 2014
Location: Spirit Lake, ID
Posts: 154
Smile On Demand Hot Water

This weekend replaced the Suburban hot water heater for an Atwood 50K BTU on demand hot water system. Not the easiest task, but it came out really well. As the Atwood front cover is way too large for the area, the original cover was modified and used. Actually the hardest part was getting the gas line disconnected from the Suburban as there was at least a hole tube of the black caulk behind the area where the fitting came through the side. Once the old unit was out I added a flexible gas line removed the 110VAC line and prepped the base by removing the two 2 x 2's added a small block as the platform was not square to the front. There is plenty of clearance around the unit for water lines etc. I removed the bypass lines as with an on-demand unit they are not required. Purchased new water lines and Shark-Bite fittings from HD. Bent them into the plastic corners using hot water. Had to remove the front flanges from the Atwood which was easy as the were shipped bend over and only attached by little tabs. So just wiggling back and forth a few times and off they came. Had to make and add little tabs to attach the front cover to with Rivets. Sealed the unit from the coach using Alum Tape and sealant. After the install the system started and worked perfect. Some have complained about the flow rate needed to turn the unit on, but I found this not to be a problem. Attached are some pictures.
Attached Thumbnails
Click image for larger version

Name:	IMG_0881.jpg
Views:	127
Size:	41.7 KB
ID:	75350   Click image for larger version

Name:	IMG_0884.jpg
Views:	117
Size:	42.0 KB
ID:	75351   Click image for larger version

Name:	IMG_0885.jpg
Views:	130
Size:	43.6 KB
ID:	75352   Click image for larger version

Name:	IMG_0889.jpg
Views:	115
Size:	47.1 KB
ID:	75353   Click image for larger version

Name:	IMG_0893.jpg
Views:	134
Size:	35.3 KB
ID:	75354  


b1barnes is offline   Reply With Quote
Old 04-27-2015, 06:23 AM   #2
Senior Member
Filthy Beast's Avatar
Join Date: Aug 2009
Posts: 620
We just did the opposite. We did not like the tankless. When camping without hookups it uses too much water and electric. Hope you like yours better than we did.

Goody Two Shoes and the Filthy Beast
2008 Chevy Silverado 2500HD
Duramax and Allison 6 speed
2012 Wildcat 282RKX

You can't make things idiot proof, you can only make them idiot resistant.
Filthy Beast is offline   Reply With Quote
Old 04-27-2015, 11:33 PM   #3
Senior Member
b1barnes's Avatar
Join Date: Aug 2014
Location: Spirit Lake, ID
Posts: 154
Wow, this one only uses propane at .25% of a tank unit and the only power is 12 volt for the spark.. Heating the water is instantaneous so all you fill is the line which would be as with a standard unit. Reading up on this there have been major advancements over the last couple years on the performance. As with everything there are those who like them and those who do not.

Was yours built in?
b1barnes is offline   Reply With Quote

hot water, water

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 10:41 PM.