Leaks on the supply side

JBurd

New member
I got a sprinter van that I'm mounting my tank and washer in so now I'm actually paying attention to every little leak in my supply system. When it was on an open trailer I'd ignore small leaks for the most part (probably not good for my pump I know). Anyway, I have nylon (or some kind of plastic) threads going into and out of my supply filter and I've tightened them down all the way and there is still a small drip. I've read that you're supposed to use teflon tape on metal only, but is there a way to stop these leaks short of using pvc glue and bonding the threads permanently?
 
I would think using clue would make it leak! Plus make every simple repair a nightmare.

You got photos, we had a guy here once who used all copper.

Your need flexible non collapsing Teflon pipe. Don't use rigid anything on supply side. Plastic pipe don't need Teflon tape, if your use it don't wrap more than twice unless you want the build up for reasons you won't encounter.

The glue cracks, after bonded because we are mobile it hardens an cracks. Then leaks


Let's see a photo


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I would use tape. Blue Monster is my favorite now.
 
Have you tried using some dope (that's what my dad used to call it anyways) it comes the same way as anti-seize that you put on spark plugs. In a small bottle with a brush. It's white pasty stuff. Lowe's or Home Depot carries it.
 
Have you tried using some dope (that's what my dad used to call it anyways) it comes the same way as anti-seize that you put on spark plugs. In a small bottle with a brush. It's white pasty stuff. Lowe's or Home Depot carries it.



My father in law is an ex plumber, Pipe Dope is the name. Dope is slang for it. Kind of like us calling bleach SH etc.
 
Here's a pic of where one of the leaks is. Its on the threads going from the filter to the hose barb. I'll try teflon wrapped only twice.

View attachment 28062

If the glue dried an cracked in there it's broken the seal ability on threads.

Tip always us hose barbs with claps on this stuff if possible.

Take a brush to the threads an make sure all the old clue is off. You might have to replace.

Inspect with finger, it rough or jagged will mean you need new.


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In my experience a combination of the two,..teflon tape and pipe dope make a water tight connection,..teflon tape a couple wraps and then a good quality pipe dope over the tape,..maybe excessive but in his case it may stop the leak. Pipe dope is made not to dry out,..but,..it will stiffen up some after the initial application,..which seems to make a better seal,...so I like to wait a little before running liquid through. Maybe not relevant in this case though. Too much teflon tape can make a thicker threaded and and turning it in too far can result in a split in the female end of the connection.

As Ron stated teflon tape isn't always needed to make a good seal,...But teflon tape not only seals, it also allows for ease of assembly and disassembly,..because teflon is slippery.

Jeff
 
If the glue dried an cracked in there it's broken the seal ability on threads.

Tip always us hose barbs with claps on this stuff if possible.

Take a brush to the threads an make sure all the old clue is off. You might have to replace.

Inspect with finger, it rough or jagged will mean you need new.


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Thanks guys. I've never glued the threads and never will. these were brand new fittings and just straight tightened all the way down. Surprisingly, the hose/barb connection didn't leak, even without a hose clamp. I like this type of hose but its so tight I can't seem to force/twist it any further onto the barbs but it doesn't leak and doesn't need a hose clamp. I'll look into the pipe dope. Maybe Ace hardware has some.
 
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