Plastic Check Valve on Hot Water Tank 2020 350M

[Apollo420]

Just over a year old and had water coming in the camper. Called a mobile service company and it was the hot water outlet check valve. AND IT's Plastic. Think of the money they saved by not using brass,LoL. Also had a "finger" leak on the low point drain because the Pex was a tight 90 to a barbed fitting. Added brass 90's. Only $350 in repairs and I did all the work taking the garage apart to get to the HWT and pulling the water panel and putting all back together.
I would suggest you change that plastic valve as soon as permissible because it will fail and is a fairly tough job on the road.

[BB&LAB]

I replaced our leaking one with brass a year ago when the plastic one leaked.

[geotex1]

Yeah, this is a pretty standard recommendation here to change it out. Carrying a spare also sage advice because it's always a Sunday issue!

[dryfly]

Yeah, this is a pretty standard recommendation here to change it out. Carrying a spare also sage advice because it's always a Sunday issue!

Geotex, do you have link to a brass valve? I don't know thread size, but would like to have one just in case. I guess they used a thread sealer on the plastic one, so is it fairly easy to remove?

[coastn]

Plastic valve failed on our third trip. Replaced with brass and carry a spare as Rob suggests.

[geotex1]

Here's Camco's:

Camco 23303 1/2" Back-Flow Preventer - Lead Free https://www.amazon.com/dp/B000EDUTN6...ing=UTF8&psc=1

You can also use residential models with a threaded nipple.

[Hoopy Frood]

Mine had male at both ends.

[traveldawg]

My plastic valve failed. It started to leak from a small crack in the threads on the water heater side.

I was thinking of replacing it with a brass valve but then there is a question of a brass valve into a steel fitting and the whole worry about non-similar metals and galvanic corrosion.

Thoughts?

[Hoopy Frood]

I'm putting in a brass check valve on mine, I've replaced one plastic one, and don't intend to do that again. I'll take my chances with corrosion.

[Redapple63]

Is Teflon tape or pipe dope enough to prevent galvanic action?