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Old 12-12-2019, 08:50 PM   #1
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2011 Avenue Coach
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Fresh Water Tank Drain Plug Repair

Has anyone ever over tightened their fresh water tank drain plug and snapped it off? If so, how did you repair it? 2011 Airstream Avenue.

Thanks in Advance.




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Old 12-12-2019, 09:02 PM   #2
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My tanks are different with elbow connections at the fresh water tank with no specific tank drain, so I haven't turned mine to cause the same outcome. Looks like your threaded section was "welded" or melted in place. Perhaps someone with a similar tank drain plug (I think I've heard of such things on AS trailers) will weigh in with a fix.


Good luck.
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Old 12-12-2019, 09:20 PM   #3
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You broke your “bung”. Those are spin-weld fittings and you can buy a spin-weld kit like below and just spin on a new fitting. Not cheap but.... it will fix your little problem.
https://www.icondirect.com/spin-weld-fittings/
https://www.amazon.com/s?k=Spin+weld...f=nb_sb_noss_2
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Old 12-12-2019, 09:47 PM   #4
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The water tank is a poly tank so you can add a uniseal fitting in place of the original So you can get a threaded poly or pvc pipe, threaded connector and a threaded plug. Lots of places to buy them online, lots of Youtube videos on how to do it.
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Old 12-13-2019, 10:24 AM   #5
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Here you go! Best pricing on the dies that I found. The process is very easy but but a couple of extra fittings and find some plastic to practice on. You may have to plug the existing hole and install a fitting next to it. I was able to install mine right on top of the broken one after sanding it flat.

http://spinwelding.com/phone/index.htmlClick image for larger version

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Old 12-13-2019, 10:58 AM   #6
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Looks nice peterp, you got skills. I got lucky and found a place down the road that does spin welding. I will let everyone know how it turns out with pictures. Thanks again everyone. I really appreciate all the great answers from this group.
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Old 12-13-2019, 01:33 PM   #7
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The easies way is use a plumber plug easy in easy out������
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Old 12-13-2019, 03:29 PM   #8
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Something like this?

https://www.amazon.com/Snap-Tite-Exp.../dp/B0085PC154
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Old 01-02-2020, 09:11 AM   #9
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I just wanted to give an update just in case someone else over tightens their drain plug. I went to Gooding Enterprises in Cottontown, TN. He is just outside of Nashville. He welded a new plastic female connector where the other one was. First he scraped off the old plastic piece. Then he attached a blank plastic disk, and then welded it on to the tank. He then drilled through the disk, into the existing whole, and tapped new thread. This way if I over tighten, the plug goes into the tank instead of pushing against the tank and forcing the connector off. All this for $49. I am very happy with his work.


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Old 01-02-2020, 09:21 AM   #10
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Glad to see you got it fixed at a reasonable price. Not sure how the new plug works differently than the old plug, but I see you used thread tape. Good choice as that reduces the chance of leaks and ensures you only need to tighten until it stops dripping and not until the plug is fully seated.
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