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Old 09-01-2020, 10:12 PM   #1
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Forester 2401w low point drain cap leaking

I noticed after filling the fresh water tank and turning on the pump that the water heater low point drain cap was leaking. I tried fixing it with Teflon tape on the threads but couldn’t fully stop the leak. Anyone else have this issue and how did you fix it? Thanks.
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Old 09-02-2020, 05:41 AM   #2
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Make sure your rubber seal is in place, Lowe’s have them if they need to be replaced
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Old 09-02-2020, 05:45 AM   #3
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YEP. need to see if the rubber seal is still inside the cap. Other option is get rid of the CAPS and replace with 1/4 turn valve.
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Old 09-02-2020, 06:57 AM   #4
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To eliminate potential leaks from the cap, and eliminate having to crawl under the motorhome to drain the line, I installed a 1/4 turn PEX valve in the compartment right above where the drain tube exits. I don’t know how the plumbing is routed in your particular motorhome, but you might consider installing a valve.
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Old 09-02-2020, 08:43 AM   #5
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Originally Posted by lwalkplumb View Post
Make sure your rubber seal is in place, Lowe’s have them if they need to be replaced
Ok well that’s the issue as there is no rubber seal. Thanks! Is it a rubber washer or an o-ring?
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Old 09-02-2020, 08:47 AM   #6
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Originally Posted by BehindBars View Post
To eliminate potential leaks from the cap, and eliminate having to crawl under the motorhome to drain the line, I installed a 1/4 turn PEX valve in the compartment right above where the drain tube exits. I don’t know how the plumbing is routed in your particular motorhome, but you might consider installing a valve.
This is a good idea. It seems like the caps hanging down are just looking for trouble.
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Old 09-02-2020, 09:21 AM   #7
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Originally Posted by Cortes240 View Post
Ok well that’s the issue as there is no rubber seal. Thanks! Is it a rubber washer or an o-ring?
Mine had rubber cone washers in them before I changed them out to ¼ turn valves.

They looked like this.

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Old 09-02-2020, 01:29 PM   #8
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You could take the cap into a hardware store to get an o ring or washer to fit. I cut a rubber disk from an inner tube to fit inside the cap.
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Old 09-02-2020, 01:34 PM   #9
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Thanks everyone for all the great suggestions. I verified that the gasket was missing in the cap and will see if my local hardware store has something that will work to replace it otherwise it’s on to Lowe’s or HD.
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Old 09-02-2020, 01:39 PM   #10
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Take one of the other caps with you to the hardware store. FYI
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Old 09-02-2020, 01:46 PM   #11
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Take one of the other caps with you to the hardware store. FYI
Yes, good idea. Thanks.
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Old 09-05-2020, 09:13 AM   #12
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You can cut them off and replace with ball valve that has built in shark bite fitting.
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Old 09-05-2020, 06:56 PM   #13
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You can cut them off and replace with ball valve that has built in shark bite fitting.
Thanks for the suggestion. I ended up fixing the leak with a cone washer and have since found replacement caps at Ace hardware so for now the problem is solved. I do plan on replacing these fittings with proper valves when I get a chance.
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