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Old 12-20-2012, 02:43 PM   #1
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Hot Water Heater Drain Plug

Does anyone know what type of drain plug they use on a 2005 DSP 3815..
They winterized my coach and lost the drain plug..I don't know what kind of plug to replace it with..
Thanks.. Keith
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Old 12-20-2012, 02:56 PM   #2
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Most water heaters supplied by Newmar are Suburban and they require a Anode rod for the drain plug.
If someone changed it to a Atwood than that water heater doesn't use one in fact it will destroy the tank.
When replacing a Anode rod do not use tape on threads use di-electric grease for lube on threads to make it easier to tread in fitting.
Tape would make rod non-functional.
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Old 12-20-2012, 03:01 PM   #3
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Quote:
Originally Posted by 007";1405581]Most water heaters supplied by Newmar are Suburban and they require a [B][URL="http://www.irv2.com/forums/f54/atwood-and-suburban-water-heaters-and-furnace-57981.html
Anode rod[/URL][/B] for the drain plug.
Have you considered going back to the "they" that did the job and asking them to replace the one they lost?
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Old 12-20-2012, 03:02 PM   #4
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Quote:
Originally Posted by 007";1405581]Most water heaters supplied by Newmar are Suburban and they require a [B][URL="http://www.irv2.com/forums/f54/atwood-and-suburban-water-heaters-and-furnace-57981.html
Anode rod[/URL][/B] for the drain plug.
I just bought one at Camping World. "Suburban Magnesium Anode Rod" Part # 232767. Good luck.
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Old 12-20-2012, 03:04 PM   #5
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Mine is either a 1/2 inch plug or a 3/4 inch.
I would think you could get one at the RV dealer.
They come in plastic and metal.
They do not have to be real tight.
Lots of people over-tighten them and they have to be drilled out.
I carry an extra with me.

If you have an add-on water heater it would be an element that screws in.
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Old 12-20-2012, 03:22 PM   #6
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Originally Posted by nccamper View Post
Mine is either a 1/2 inch plug or a 3/4 inch.
I would think you could get one at the RV dealer.
They come in plastic and metal.
They do not have to be real tight.
Lots of people over-tighten them and they have to be drilled out.
I carry an extra with me.

If you have an add-on water heater it would be an element that screws in.
NCcamper
Just to elaborate....the thread is 1/2" MPT (male pipe thread). Use a nylon material as metal would need to me the same as tank to avoid dissimilar metals corrosion. All that is if no anode rod is needed dependent on brand.
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Old 12-20-2012, 03:41 PM   #7
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Originally Posted by Kazoo Tom View Post
Have you considered going back to the "they" that did the job and asking them to replace the one they lost?

Exactly. This should be on their dime, not yours. If your not close, give them a call and talk up the ladder until you find someone that can take care of it.
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Old 12-20-2012, 04:48 PM   #8
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Hi Knot-Fly'n,
If it is a Suburban water heater, then "they" lost the anode rod. Suburban water heaters drain via removal of the anode rod. It is the only way. The previous posts provide information on a replacement. CW sells them along with most home improvement stores. It is an industry standard item.
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Old 12-20-2012, 05:10 PM   #9
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Water Heater Drain Plug

Atwood water heater uses a Nylon 1/2 NPT drain plug. Suburban water heater uses a Plug with an anode.
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Old 12-20-2012, 06:28 PM   #10
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If you are not sure, Go to an RV dealer, Ask the service dept, which one you need, then get it from parts.. If they charge, for the advice, shop elsewhere.

MOST surburans need anode, Most Attwoods use nylon plug.
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Old 12-20-2012, 06:36 PM   #11
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Originally Posted by "007" View Post
When replacing a Anode rod do not use tape on threads use di-electric grease for lube on threads to make it easier to tread in fitting.
Tape would make rod non-functional.
The teflon thread tape is perfectly fine to use since the threads cut through it anyway.
Di-electric grease is an insulator, I never use it on the WH, I use the teflon tape.
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Old 12-20-2012, 06:52 PM   #12
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Originally Posted by Mr_D View Post
The teflon thread tape is perfectly fine to use since the threads cut through it anyway.
Di-electric grease is an insulator, I never use it on the WH, I use the teflon tape.

Agree with Mr_D and do not understand how teflon tape makes the anode useless
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Old 12-20-2012, 07:50 PM   #13
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Water heater

Thanks for all the reply's .... I have the suburban water heater. I had some work done on my coach at McLeans. In Ok City. They had to winterize because it was their policy after Nov. 1. Anyway they misplaced the plug. We live on Lake Texoma and going south for Christmas. After much talk with girl in the service dept. she said I could pick one up in the Denton, TX store on our way south and she would pay for it. We are leaving tomorrow Dec. 21.

Thanks again.
Keith
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Old 12-20-2012, 09:37 PM   #14
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OK I stand corrected this link will say your correct, my rods would not deteriorate with the tape on them, maybe to much tape.
The di-electric for the threads did not stop the dissolve action of rod thats why I have used it on mine.
If the rod was insulated with the tape from sidewalls of tank which rod is screwed into the rod would not work I was led to believe. That opinion must have been wrong.
Then to add to this I have always been of the opinion that Atwood heaters did not require a Anode rod so what explains this.
Must be the age thing creeping up on me again.
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