Hot water heater drain cap

**highdesert** · 09-13-2022, 02:42 PM

Originally Posted by highdesert

https://www.google.com/search?client...p+1%2F2%22+cap

I bought a few of the

zurn qtc3fqp

they work greart

**Dooley** · 10-21-2022, 06:18 AM

Originally Posted by NB Canada

It is a cap on my 2021 Imagine just for clarity

2021 Imagine 2400 BH
2018 GMC Sierra 4x4 crew

you are correct, it is a cap. my question is, where can you find these? I would like to have an extra one. Thanks.

**Harvestmoon** · 10-21-2022, 01:01 PM

I was advised by my dealer service dept that the plastic cap is part of the water heater failsafe design. In event of an overpressure, the cap is designed to fail before the tank. The is a very low probability mode since it would require multiple other safety systems to fail first, including the burner not shutting off and the pressure relief valve not opening.

**Ynot4me2** · 10-21-2022, 04:04 PM

Originally Posted by Harvestmoon

I was advised by my dealer service dept that the plastic cap is part of the water heater failsafe design. In event of an overpressure, the cap is designed to fail before the tank. The is a very low probability mode since it would require multiple other safety systems to fail first, including the burner not shutting off and the pressure relief valve not opening.

It's possible but I've never heard of that.

**tamathumper** · 11-02-2022, 09:24 AM

Your dealer is correct, the plugs / caps are part of the tank's safety design and are Nylon, not just any plastic. Personally I don't recommend replacing the caps with anode rods, ball valves, or anything other than what the OEM provided, but I understand that people want to modify and customize their rigs to their tastes.

**MoonShadow_1911** · 11-02-2022, 09:56 AM

Originally Posted by tamathumper

Your dealer is correct, the plugs / caps are part of the tank's safety design and are Nylon, not just any plastic. Personally I don't recommend replacing the caps with anode rods, ball valves, or anything other than what the OEM provided, but I understand that people want to modify and customize their rigs to their tastes.

In my case, I had to. The cap deformed with the heat from the water and leaked, eventually, it wouldn't hold with the pressure. At the time, Dometic didn't have any replacements in stock and were projected to have them 6 to 8 months out. I replaced the cap with the ball valve so we could use the coach.

**masterdrago** · 11-11-2022, 12:32 PM

Originally Posted by TyeeMan

Here's what I did on my water heater. Never have to worry about the plug again. The hose is a high pressure braided hose I got from McMaster Carr and the ball valve and brass barbed fitting and hose clamps I got from Home Depot.

Attachment 36919

I really like your solution. I had already done this with a stainless full flow ball valve and a hose adapter. Had to remove most of the valve handle.