Fresh water tank leak repair - Dutchmen Owners

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Old 12-17-2018, 06:37 PM   #1
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Fresh water tank leak repair

We have a Voltage 3990 with a fresh water leak coming right around the joint where the low point drain is. Looks like too much flex and the seam has given way. Anybody know of an easy DIY permanent fix that doesn't require tank removal?
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Old 12-18-2018, 10:57 AM   #2
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Not sure if they make epoxy that will stick to polyethylene. I do know you can thermal weld the plastic if you have the right kind of rod. Then consider some sort of reinforcement to keep it from happening again.

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Old 12-18-2018, 11:36 AM   #3
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Not sure how permanent it is or what type of surface prep is required, but have you thought about this stuff? I keep a couple of short rolls of it on the RV in case of emergency.

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Old 12-18-2018, 01:15 PM   #4
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Originally Posted by wahoonc View Post
Not sure if they make epoxy that will stick to polyethylene. I do know you can thermal weld the plastic if you have the right kind of rod. Then consider some sort of reinforcement to keep it from happening again.



Aaron
That was my original thought, Aaron, just didn't want to buy more tools I will only use once or twice full timing
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Old 12-18-2018, 01:17 PM   #5
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Originally Posted by franktafl View Post
Not sure how permanent it is or what type of surface prep is required, but have you thought about this stuff? I keep a couple of short rolls of it on the RV in case of emergency.

https://www.asseenontvexpress.com/pr...smart_campaign
Thanks Frank, that all the boss kept saying. I saw it on TV it works on the bottom of that boat! Have to make try it as it is cheaper than buying tools.
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Old 12-18-2018, 04:29 PM   #6
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Thanks Frank, that all the boss kept saying. I saw it on TV it works on the bottom of that boat! Have to make try it as it is cheaper than buying tools.
I would make sure I used the tape and not the liquid because of the extra reinforcement.
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Old 12-19-2018, 01:14 AM   #7
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Thanks Frank, that all the boss kept saying. I saw it on TV it works on the bottom of that boat! Have to make try it as it is cheaper than buying tools.
But what is the boat made out of? And will the stuff stick to Polyethylene or whatever the tank is made out of?

Let us know if it works...

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Old 12-19-2018, 01:56 AM   #8
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I bought a plastic welder from HF long ago to repair our plastic stock tanks I also patched a kayak with it. It worked pretty good. The price was cheap and came with a handful of assorted rods, it also needs an air compressor for it to work properly. The instructions were pretty easy but for it to work you need to follow them.
https://www.harborfreight.com/80-wat...kit-60662.html
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Old 12-23-2018, 03:31 PM   #9
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You can use an epoxy called Hysol blended with milled glass. The key to make it work is you need a good mechanical bond and a very clean surface. Wire brush or 36 grit sand paper to rough up the entire area, beyond where the epoxy will go, and wipe down with denatured alcohol.



Mix the epoxy and milled glass into a paste and apply it. Use an acid brush to work it into the grooves, this is key, you need 100% coverage or it will fail. Once worked in, take a wide popsicle stick and apply the rest, if it sags, add more glass. A heat gun can also help it adhere, the warmer surface will let the epoxy flow better.



When done, adding a layer of fiberglass cloth can strengthen the repair.



Now here is where it can fail with epoxy, movement. If the crack was caused by movement, correct that first, then use the epoxy.



https://www.rcplanet.com/finishing-s...saAt-VEALw_wcB


https://www.amazon.com/Loctite-23711...26032522&psc=1
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Old 12-23-2018, 04:32 PM   #10
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Quote:
Originally Posted by acdii View Post
You can use an epoxy called Hysol blended with milled glass. The key to make it work is you need a good mechanical bond and a very clean surface. Wire brush or 36 grit sand paper to rough up the entire area, beyond where the epoxy will go, and wipe down with denatured alcohol.



Mix the epoxy and milled glass into a paste and apply it. Use an acid brush to work it into the grooves, this is key, you need 100% coverage or it will fail. Once worked in, take a wide popsicle stick and apply the rest, if it sags, add more glass. A heat gun can also help it adhere, the warmer surface will let the epoxy flow better.



When done, adding a layer of fiberglass cloth can strengthen the repair.



Now here is where it can fail with epoxy, movement. If the crack was caused by movement, correct that first, then use the epoxy.



https://www.rcplanet.com/finishing-s...saAt-VEALw_wcB


https://www.amazon.com/Loctite-23711...26032522&psc=1
Ok, acdii, but can it be repaired upside down with this method? I don't have a clue if my 80gal tank can even be removed. I tried the HF iron, it doesn't heat up enough to melt the tank to get it to bond before the plastic strips start burning.
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