Help identify this valve

[bvrs2020]

Hi everyone. Need helping identifying this valve by the hot water heater. I remember reading about it but can't remember and find the info. It's on a 2017 30' flying cloud.
Thanks for the help
Kevin

[SCOTTinNJ]

Looks like a drain. Does it lead out the bottom of the trailer?

[Adventure.AS]

Part of water heater bypass plumbing. It is in the off position.

[bvrs2020]

Should it be in on position if using hot water heater?

[Adventure.AS]

Originally Posted by bvrs2020

Should it be in on position if using hot water heater?

The bypass system would have three valves. When using the HW tank the valve to and the valve from the tank would be open and the bypass closed.

[bvrs2020]

Where is the 3rd valve? I see the brass valve right at hot water heater, and this one.

[Adventure.AS]

You need to check your manual. Newer trailers have the single brass valve which is the bypass control and then as another poster stated this may be a system drain valve.

[bvrs2020]

Thats is the drain valve. Thanks for help everyone.