Gas tank repair
Thread Starter
Tech Contributor
Joined: Apr 2007
Posts: 10,924
Likes: 78
From: Forney Texas
Gas tank repair
I put a 3/8 pipe fitting in my fuel tank for a secondary fuel system and it has a slow leak. I know that the tank is made of polyethylene and no organic compounds bond to it very well if at all, but I do know there are supposed to be compounds that are impervious to gasoline, such as Marine Tex putty/epoxy. I am hoping that putting this on the threads, running the fitting in the tank and letting it set up will cure my slow leak. I am wondering if anyone has any experience with this. Please share your ideas!
I am also considering exchanging out the pipe fitting for a bulkhead fitting, but the hole isn't in a flat spot. It's in the curve of the tank at the bottom, so I am concerned that it won't seal any better.
I am also considering exchanging out the pipe fitting for a bulkhead fitting, but the hole isn't in a flat spot. It's in the curve of the tank at the bottom, so I am concerned that it won't seal any better.
Thread Starter
Tech Contributor
Joined: Apr 2007
Posts: 10,924
Likes: 78
From: Forney Texas
I forgot to mention that I'm not actually sure that the tank is made of Polyethylene. It seems to be made of 2 different materials. The inside is white and the outside is black. It could be Polyethylene Terephthalate, high density polyethylene, low density polyethylene or polypropylene, so you can also tell me if you know what material these tanks are made of.
Tech Contributor
Joined: Jan 2007
Posts: 19,493
Likes: 1,178
From: Dyer, IN
I put a 3/8 pipe fitting in my fuel tank for a secondary fuel system and it has a slow leak. I know that the tank is made of polyethylene and no organic compounds bond to it very well if at all, but I do know there are supposed to be compounds that are impervious to gasoline, such as Marine Tex putty/epoxy. I am hoping that putting this on the threads, running the fitting in the tank and letting it set up will cure my slow leak. I am wondering if anyone has any experience with this. Please share your ideas!
I am also considering exchanging out the pipe fitting for a bulkhead fitting, but the hole isn't in a flat spot. It's in the curve of the tank at the bottom, so I am concerned that it won't seal any better.
I am also considering exchanging out the pipe fitting for a bulkhead fitting, but the hole isn't in a flat spot. It's in the curve of the tank at the bottom, so I am concerned that it won't seal any better.
