Winterizing Aid - Fiberglass RV

Thread Tools Search this Thread Display Modes
Old 04-26-2009, 10:46 AM   #1
Senior Member
Steve L.'s Avatar
Name: Steve
Trailer: 2003 Casita 16' SD
Posts: 1,652
Latest mod on Castle Pretentious:

Originally, I poured a gallon or two of RV antifreeze into the freshwater tank and pumped it through the system, bypassing the hot water heater. However, in the spring, the multiple flushing of the tank was a bit of a hassle.

The last couple years I just blew air through the system from the city water connection. It’s worked but it doesn’t drain the hoses upstream of the one way valve on the water pump. I’ve worried about cracking the water filter or possibly damaging some part of the water pump.

I decided to plumb in a valve set up that allows me to pump RV antifreeze into the system, through the water filter and pump, and out into the faucets. The picture shows the set up in its normal configuration. The water filter is to the right of the valves.

Click image for larger version

Name:	DSCN0890__Small_.JPG
Views:	46
Size:	60.4 KB
ID:	19709

To pump the antifreeze, close the lower valve, open the upper valve, fit one end of a plastic hose on the intake and the other into the RV antifreeze bottle and run the water pump opening a faucet at a time.

I cut a generous access hole, covered it with aluminum diamond plate and reinstalled the kick panel. I have threaded steel inserts imbedded into the particle board to screw the plate to.

The valve arrangement is plumbed in PEX tubing to get some stiffness to make turning the valves easier. I also expected PEX there but found 1/2 in. ID vinyl tubing instead.

The tubing to the left, back towards the water tank is still somewhat at risk but I can live with it.

All in all, not a critical modification. Just a minor refinement to make things easier in the fall.
Attached Thumbnails

Quando omni flunkus, moritati
Steve L. is offline   Reply With Quote
Old 04-26-2009, 03:03 PM   #2
Senior Member
Trailer: 2009 Scamp 16 ft / 2003 Durango
Posts: 692
What I do on my boat, ( don't have trailer yet ) is unhook inlet line at the pump and put a hose on there and into the bottle of RV antifreeze.

Then I just blow the line back to the tank with compressed air.

Just make sure that there isn't a check valve in the line from the tank to the pump.

Bill K
Bill K is offline   Reply With Quote

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
Winterizing Bigfoot Mike Care and Feeding of Molded Fiberglass Trailers 0 10-11-2006 10:32 AM
Winterizing Gerry Care and Feeding of Molded Fiberglass Trailers 27 10-11-2006 07:08 AM
Winterizing stevenff Problem Solving | Owners Helping Owners 7 11-29-2005 07:51 AM
"De"- winterizing Legacy Posts Care and Feeding of Molded Fiberglass Trailers 6 06-05-2003 02:44 PM
Winterizing Legacy Posts Care and Feeding of Molded Fiberglass Trailers 10 09-20-2002 09:09 AM

» Upcoming Events
No events scheduled in
the next 465 days.
» Virginia Campgrounds

Reviews provided by

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 -6. The time now is 09:19 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.