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Old Oct 13, 2015 | 12:41 PM
  #1  
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Quick Repair Advice

Some of you may remember this post from a few months back:

https://www.ford-trucks.com/forums/1...mping-now.html

To sum it all up, I made an error in judgment and tore the wastewater manifold off my trailer. Most of the damage was minor, but I did tear the outlet off the greywater tank.

I have family visiting in 2 weeks and we plan on doing a lot of camping. We did some tent camping after I broke it so didn't repair it yet. Unfortunately now I have neither the time or the money right now to tear up my bathroom floor so I can replace my greywater tank. Does anyone have an idea how I can temporarily repair the outlet on my greywater tank so it will hold water.

The hole in the tank is slightly jagged but not too bad. It is fairly close to the size of the 2" outlet that was torn out. I was thinking about gluing a bulkhead fitting to the tank, but I'm not sure if it would actually hold. I've considered JB Weld, Epoxy, and even fiberglass mesh and resin. Either using these to glue a replacement outlet it place or to glue the original back place.

Any ideas?
 
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Old Oct 13, 2015 | 01:48 PM
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Maybe this stuff will work for you - Plasti-Mend Black along with some ABS cement (if it's the usual black plastic tank and piping). Do a google to check out the price plus labor for a replacement tank and you will try almost anything that sounds like it might work

If you do end up using it, please post your experience as some of us have 'tank problems' too
 
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Old Oct 13, 2015 | 01:57 PM
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whatever you do.. remember water/gray is 8 pounds per gallon TIMES the amount your tank holds...

attach then reinforce... maybe twice of reinforcement...

clean area well and clean it again.. then sand so product will hold.. and clean again .. then apply whatever product you deside to use.

the Best of Luck... and report back.
 
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Old Oct 13, 2015 | 04:45 PM
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Hot air weld.

Steve
 
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Old Oct 13, 2015 | 06:02 PM
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I believe my tanks are polyethylene. I'm finding it very hard to find anything that works well on polyethylene as far as glues. Looks like hot air welding is the best method, my problem with that it won't be cheap to do that either since I'll have to buy a hot air gun or one of the soldering iron ones, if they even work.
 
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Old Oct 13, 2015 | 06:10 PM
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I don't know of any glues that are recommended for use on poly. I just researched this topic last week for a job I have to do. I haven't hot air welded for years, but in principal the result is actually stronger than the original tank and it is not very hard to do.

I know, the cost is a stumbling block! The cheapest I have found is Northern Parts.

Steve
 
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Old Oct 13, 2015 | 10:39 PM
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Hass anyone used this onePlastic Welder & Welding Kit
 
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Old Oct 14, 2015 | 09:09 AM
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I have found that things from H.F. are good for a one-time use. But even IF that is true, that price would be worth it. (If it works!)
 
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Old Oct 14, 2015 | 10:08 AM
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if you do not have an air compressor

HF offers this one with more heat and a little more cost.
Plastic Welding Kit

I have NOT used any of these.
 
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Old Oct 14, 2015 | 10:11 AM
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I have not used these specific ones and the one I did use did not require a compressor. They are really basic, but then all they are is a glorified heat gun. They simply make it easier to precisely direct the heat.

Given the OP's situation, is there another alternative?

Steve
 
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Old Oct 16, 2015 | 08:07 PM
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JB Weld make an epoxy for bonding Polypropylene & Polyethylene Plastics called Plastic Bonder. Similar epoxy is used to repair plastic bumpers on vehicles.

I used this on my freshwater tank that had two holes rubbed in it from the #14 sheet metal screws holding the rear screw jacks on my Keystone Outback 5'r. Worked great and no leaks on recent 7800 mile rode trip to Washington state from Alabama.

Plastic Bonder Syringe | J-B Weld
 
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Old Oct 16, 2015 | 08:16 PM
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From the FAQ section of JB Weld for this product:

"J-B Weld will not adhere or bond well to:
Any flexible rubber surface
Leather
Vinyl
Canvas
Polypropylene plastic
Polyethylene plastic"


Kind of confusing, when I went to their site under FAQ, but it sure sounds like it works, so maybe the FAQ isn't for this product?

Steve
 
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Old Oct 17, 2015 | 07:08 AM
  #13  
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Originally Posted by RV_Tech
From the FAQ section of JB Weld for this product:

"J-B Weld will not adhere or bond well to:
Any flexible rubber surface
Leather
Vinyl
Canvas
Polypropylene plastic
Polyethylene plastic"


Kind of confusing, when I went to their site under FAQ, but it sure sounds like it works, so maybe the FAQ isn't for this product?

Steve
Steve - they also make one that will adhere to ABS (Plastic Weld) and another that is supposed to stick to the polys (Plastic Bonder) : Plastic/Composite/PVC | J-B Weld . I've tried their regular stuff on ABS for no other reason but it was what I had (interior of my '31 Ford street rod) - it wont work
 
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Old Oct 17, 2015 | 07:21 AM
  #14  
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Originally Posted by Just Strokin
JB Weld make an epoxy for bonding Polypropylene & Polyethylene Plastics called Plastic Bonder. Similar epoxy is used to repair plastic bumpers on vehicles.

I used this on my freshwater tank that had two holes rubbed in it from the #14 sheet metal screws holding the rear screw jacks on my Keystone Outback 5'r. Worked great and no leaks on recent 7800 mile rode trip to Washington state from Alabama.

Plastic Bonder Syringe | J-B Weld
Larry,

How big was the repair area and was it on the bottom of the tank? I have to repair a fresh water tank where the customer put in a new drain plug and tightened it too much partially ripping off the expanded part the plug screws into.

I guess I can't see any harm in trying the J-B and can always hot air weld it, if the JB doesn't hold. I am trying to avoid pulling the entire tank and replacing, but since they actually use the fresh water tank when camping in the National Forest, my repair has to hold.

Thanks,

Steve
 
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Old Oct 17, 2015 | 08:51 AM
  #15  
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Steve, the holes were about 3/8" in diameter....it dried fairly quickly as epoxy does...poked around the area and could not see any area that was not adhered....

I think the FAQ's are generic and most seem to be related to the original JB Weld product and not the specialty products.
 
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