Go Back   iRV2 Forums > MOTORHOME FORUMS > MH-General Discussions & Problems
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  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 10-05-2015, 04:06 PM   #1
Senior Member

Join Date: Sep 2012
Location: Monterey Bay, CA
Posts: 136
Winterizing WITHOUT a water heater bypass ????

I'm dealing with winterizing my RV for the first time and could use some advice from the cold weather folks out there.

We live in a no-freeze winter climate, so I never winterize the rig. This year we are storing the rig in a freeze prone area, so I'm having it winterized by a repair shop before going into storage. We're on the road, so it's not a convenient do-it-yourself situation for me.

The shop suggests installing a water heater bypass set-up. I know how those connect, and I also know how tight the space is for adding any more plumbing. I don't want to pull the heater out and I don't want to butcher the cabinet for more clearance either. (I replaced that water heater myself and am intimately aware of it's plumbing and space limitations.)

Since I don't plan to store in a freeze prone area again....I'm tempted to skip the bypass and just pump another 6 gallons of antifreeze into the system.

Any problems with that approach???? Thanks for your inputs.


Karlos and Dawn
2000 Sea View 8341
Ford F-53 chassis V-10
Karlos 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 10-05-2015, 05:30 PM   #2
Senior Member
grumpy0374's Avatar
Join Date: May 2015
Posts: 453
Don't know what brand of water heater you have, but you can simply drain the water out of it. If your drain plug is also the anode rod, get a simple brass plug from Lowes, plumbing dept, with the same thread, and some teflon tape. Use it instead of the anode rod/plug. And than winterize it as normal. Run a few gallons of anti freeze in your fresh water tank and turn faucets on, hot and cold. Hot will run some anti freeze into your hot water heater.

grumpy0374 is offline   Reply With Quote
Old 10-05-2015, 09:19 PM   #3
Senior Member
okie143's Avatar
Join Date: Aug 2010
Location: Oklahoma
Posts: 277
Doesn't hurt to put rv winterizing antifreeze in your hot water tank.
I put a hot water heater bypass on mine but have to have the slide out to get to it.
Do now I just put rv antifreeze in and don't worry about it.
Retired Army, Disabled Veteran
Wife, me, and 2006 Coachman Cross Country 372DS makes three, Demco Kar Kaddy SS
okie143 is offline   Reply With Quote
Old 10-06-2015, 09:09 AM   #4
Senior Member - DIYer
Waiter21's Avatar

Ford Super Duty Owner
Join Date: Nov 2014
Location: NW Ohio
Posts: 3,913
Drain everything from low point drains. (open all faucets)

remove the water heater drain and drain it. (open the pressure release valve on the water heater).

If you can, use air pressure to blow out the lines. This will help push any water thats pooled at low points.
1999 Fleetwood Southwind 35S (Ford F53 6.8L V10) - Toad 2003 Saturn Vue.

It won't do MACH 2, but I can get a sandwich and take a pee.
Waiter21 is offline   Reply With Quote
Old 10-09-2015, 12:33 PM   #5
Senior Member
ru499's Avatar
Join Date: Dec 2010
Location: Tuckerton, NJ
Posts: 155
I would just drain the system, blow out with air. I think you'll be sorry if you put antifreeze in your water heater. The antifreeze residue is hard to get rid of.
Or if this will be a yearly event, put in the bypass.
2005 Itasca Horizon 40FD
FMCA 428291
ru499 is offline   Reply With Quote
Old 10-09-2015, 03:22 PM   #6
Senior Member
Solo Rvers Club
Join Date: Mar 2011
Posts: 317
I put some antifreeze in my hot water tank last fall by accident. Do not do that. It took a lot of purging this spring to get rid of the smell and frothy hot water.
NRR is offline   Reply With Quote
Old 10-09-2015, 03:40 PM   #7
Senior Member
Join Date: Sep 2012
Posts: 7,018
FWIW I did not know anyone built units without a bypass....
nothermark is offline   Reply With Quote
Old 10-09-2015, 03:58 PM   #8
Senior Member
powderman's Avatar
Join Date: Mar 2010
Location: N. E. Ohio & Lady Lake Fl.
Posts: 904
Originally Posted by nothermark View Post
FWIW I did not know anyone built units without a bypass....
Agreed. Some just have a single handle and check valve.
powderman is offline   Reply With Quote
Old 10-09-2015, 04:03 PM   #9
Registered User
mel s's Avatar
Join Date: Mar 2010
Posts: 8,777
Originally Posted by ru499 View Post
I would just drain the system, blow out with air. I think you'll be sorry if you put antifreeze in your water heater. The antifreeze residue is hard to get rid of.
Or if this will be a yearly event, put in the bypass.

I have never used antifreeze in my fresh water system and it has been stored outside through 19 Wisconsin winters.
'96 Safari, 144k miles
mel s is offline   Reply With Quote
Old 10-09-2015, 04:44 PM   #10
Senior Member
wa8yxm's Avatar
Damon Owners Club
Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 23,955
There are two ways to winterize described in the forum libraries.
Wet Method.. (Avoid)
Dry Method (Works great)

Start by dumping black and gray (And wash if you have one) tanks.

Modifications to dry method and recommendation.

In the dry method you use compressed air,, i'd set your air regulator at 50-60 PSI tops.. Open all valves including the low point drains and let it drain.. Pull the drain plug on the water heater and replace with threaded pipe, Plastic or metal matters not 1/2 inch Iron pipe thread. (Just long enough to get the water flow outside the RV) NOTE Do this with the water heater COLD. Now open the manual lever on the TPR valve at the top to let air in.

Once it's finished draining cap the pipe, Close the TPR, and blow the lines... When yhou run out of air on your compressor or when you no longer get any water stop and let Compressor re-fill.

Force cycle the ice maker (it will drain back) and uncap the water heater and open the TPR to drain what blew into it (NOTE you will do this often) Once the compressor is ready Cap and close the Pipe and TPR again and BLOW once more. Same duratin.

You will do this like five times. (or more) till you are satisified there is only a few drops left in the lines.

NOW... Pink the Drains, Traps and toilets

NOTE You should also flush toilets after every blow as well to let them drain down. (Yes it will be back flow but hey, Can't prevent that Or better yet flush 'em while your partner blows (Applies compressed air) You can disconnect the water line to the toilet from the valve on many models (how I did it)

I now use the method you used last year (S.E. GA and I( full time).

Home is where I park it!
wa8yxm is offline   Reply With Quote

heat, heater, water, water heater, winter

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
Help needed - Atwood 10 gal Water Heater - Noise at Relay? BeHappy Winnebago Industries Owner's Forum 4 05-18-2015 06:50 AM
Water heater issue 2002 Itasca horizon 39QP bruce Dixon Class A Motorhome Discussions 6 04-17-2015 05:21 PM
Challenger 37GT water heater bypass TheMrB Thor Industries Owner's Forum 2 04-16-2015 11:39 AM
No water from Atwood hot water heater bsamole Winnebago Industries Owner's Forum 5 08-24-2014 09:11 PM
Winnebago minnie hot water heater bypass Jamie414 Travel Trailer Discussion 2 04-20-2014 06:51 PM

» Featured Campgrounds

Reviews provided by

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 03:58 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.