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Old 10-27-2015, 04:10 PM   #29
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2014 20' Flying Cloud
Long Island , New York
Join Date: Jun 2015
Posts: 2,850
Originally Posted by Mike S. View Post
The brass valve is a water drain for the plumbing system, not the tank. The white valve drains the tank. I broke the brass valve while my trailer was sitting in my shop trying to figure out what is was for. Had a hose hooked up to the water supply and turned the valve. Water came out and the valve broke off. The 90 fittings have a thin wall and are easy to break. It is a pita to fix, had to cut an access hole to gain access to the pex tubing. If it breaks, the brass fittings will just spin in the pex. I put a smaller valve, like that found on a car radiator, to reduce the chances of being hit, eliminating the 90 fittings. Hope this helps.
Originally Posted by 111 View Post
Nothing in the owners manual about the brass. Dealer doesn't know anything.
Thanks Mike for solving the mystery here. I believed you but thought it best that 111 confirm the diagnosis for HIS coach's valve.

Could you guys please comment on the left end of the valve being convex/bulbous to receive flared copper tubing, or is it NPT as wander-west suggests?


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Old 10-27-2015, 05:45 PM   #30
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2015 23' Flying Cloud
Moses Lake , Washington
Join Date: Aug 2015
Posts: 21
Images: 2
No flare on the brass, Its a low point drain for the lines but its in a exposed area. Just asking to be knocked off or turned on so all my water gets pumped out.

Great for winterizing though..

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Old 10-27-2015, 08:09 PM   #31
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2010 23' International
Joliet , Illinois
Join Date: Nov 2013
Posts: 52
I have the same setup on my 23D. Mike S. has it right. It's a drain on the plumbing side (after the water pump). If I remember right, take out the converter/ fuse box and you can see the tube go straight down through the floor.

I am going to put on a winterizing kit this year and have everything apart......again. Can get a picture if someone needs.
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Old 10-27-2015, 08:53 PM   #32
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Probably low point drain for water lines.
We have. 25' Flying Cloud. Had to replace one of our low point valves. Airstream sent us a brass value just like this one.

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