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Water heater drain

Can anyone help with telling me where the hot water tank drain is and if there is a shutoff so it doesn't keep filling so I can take it out to find a leak?

Adkins
1989 Grand Villa
1989 GV Private Coach. DD Pusher/Allison
Stay Free And Safe
Kennyb

Re: Water heater drain

Reply #1
On a propane hot water tank there is a pipe plug at the bottom of the tank. As for a shut off I doubt it unless someone has but one
in.
Peter and Frieda Morin
1999 36ft. U320 Foretravel
Build # 5436
1998 Suzuki Sidekick Sport

Re: Water heater drain

Reply #2
If you have a U300 with an additional hose from the engine for the heat exchanger, follow the directions below:
https://www.youtube.com/watch?v=NAf0GPsLbUY
Pierce and Gaylie Stewart
'93 U300/36 WTBI
Detroit 6V-92TA Jake
1140 watts on the roof
SBFD (ret)

Re: Water heater drain

Reply #3
1.  Can anyone help with telling me where the hot water tank drain is...
2.  ...and if there is a shutoff so it doesn't keep filling...
1.  See photos below of Atwood water heater.  Only helpful if you have a Atwood GH6-7E.

2.  Turn off shore water.  Turn off water pump.  Water heater should not keep filling.

Atwood GH6-7E – PDX RV


1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: Water heater drain

Reply #4
And if you don't want to be buying a new control valve you might want to do what I did (after two valves flooded/failed at about $34 each) and get a 2" long pipe nipple and an end cap and put them in where you currently have a pipe plug or a petcock.
You might have to slightly elevate the gas line so the nipple goes underneath, but the improvement is well worth the effort.
After doing this mod the water now runs out without running down the side of the coach, and the pipe conversion will still allow you to close the heater door.
Now that I think about it, I am not positive on the pipe nipple length. Measure your distances for yourself. Seems I bought two different lengths but don't remember which one I used.

Got to amend this post, as I remember things different after looking at my "supply" in the shed.
I used a pipe nipple and a coupler. I don't remember length  of the pipe nipple tho. I did grind the outside diameter of the coupler down so it would clear the propane supply line. I figured the slight reduction in wall thickness wouldn't make much of a difference seeing as how the water pressure isn't all that high.
By using a coupler I could then use the standard nylon pipe plug in the end and still clear the louvered door.
Nitehawk,  Demolition Lady, & our NEW master, Zippy the speeding BB cat.
1989 Grand Villa 36' ORED
Oshkosh chassis, 8.2 DD V8
2006 Saturn Vue AWD

Re: Water heater drain

Reply #5
I have an Atwood GCH6-6E and I can't find a replacement model number and I need to replace the whole unit. Anyone know the replacement model or another brand that fits? Also why is it described as a 3-way? I can only see an LP and electric connection. Is there a 3rd source of power?
1989 GV Private Coach. DD Pusher/Allison
Stay Free And Safe
Kennyb

Re: Water heater drain

Reply #6
Also why is it described as a 3-way? I can only see an LP and electric connection. Is there a 3rd source of power?
Third source is MotorAid loop.  Circulates hot engine coolant around the water tank.  Heats the water as you drive so it's hot when you arrive at destination.

Replacing Atwood Water Heater
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"