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Old 06-24-2012, 09:06 AM   #1
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Fresh Water Drain repair

Ok here is what I have. The past owner has damaged the glued on thread fitting where drain valve is located for Freshwater tank. They then tried to glue on a larger fitting around outside of this fitting, and used a Ton of fiberglass repair cloth and resin. Well the resin did not stick to the Poly tank so I had a leak start this year under the resin. I have completely taken off old patch and removed broken welded on fitting from tank. So now I have a 2" hole in bottom of tank. what would be next step in 1. either gluing on new fitting, if possible. or 2. gluing a patch over this hole and making a new smaller hole for new fitting? Thanks for any advice on this. I currently do have Poly Epoxy, but do not have a Poly welder on hand. If that helps.

David
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Old 06-24-2012, 11:13 AM   #2
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Hi David, is the top of your tank accessable? and are you looking for a fast fix... or a permanent fix?
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Old 06-24-2012, 02:39 PM   #3
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Hey Dave:

Water Tank Repair & Fittings :: RV Fresh Water :: RV Parts Store

Is a link for a business that has repair parts for tanks. Perhaps these will help you in this. Good Luck.
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Old 06-24-2012, 07:45 PM   #4
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Quote:
Originally Posted by loonlake73 View Post
Hi David, is the top of your tank accessable? and are you looking for a fast fix... or a permanent fix?
I have dropped the tank and have total access to all sides of the tank. My last fiberglass resin patch, that did not hold, was a mess trying to work on it up side down. So I have the tank in back of my truck and trying to figure out a permanent drain valve fix.
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Old 06-24-2012, 07:49 PM   #5
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Originally Posted by MikeandClaudia View Post
Hey Dave:

Water Tank Repair & Fittings :: RV Fresh Water :: RV Parts Store

Is a link for a business that has repair parts for tanks. Perhaps these will help you in this. Good Luck.
Thanks for the link, I will see if one of these can work for me. I would really like to get the 1/2" one to work. May have to Plastic weld a patch over 2" hole if new fitting is too small for current hole I have. I bought a polyethylene cutting board that I was thinking about cutting up for patch material.

Thanks MikeandClaudia
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Old 06-25-2012, 11:57 PM   #6
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tank repair

Yours is a common problem with tanks that have a drain attached to the side or the bottom of the tank. The best fix I have done is to go to a plumbing store buy a 3 or 4" access plate and cover, cut a hole in the top of the tank above the spot you need to repair. Now take the piece you have just cut out and glue it inside the tank (water pres. forcing patch down will help prevent future leaks). If you can get hold of some windshield urathane and put a bead arround the inside of the small hole (inside) and then apoxy to the outside of the patch you will never have a leak there again. The reason not to use urathane for the whole patch is because it is not potable, outherwise urathane is a very strong adhesive but you must wait 24hrs before putting tank into use. The bonus of doing it like this is you can now access your tank to give a good cleaning every now and then. Next DO NOT attach your drain fitting to the patch but to a more stable part of the tank. Attach a hose to the fitting and run it to the drain valve. Screw down the valve so that when you turn it on/off it does not put pressure on the tank, thereby cracking it. Good luck Steve
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