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Old 09-06-2011, 11:51 PM  
1victorianfarmhouse
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Default Leaky Pipe Threads

For many years on threaded items that pass liquids (brake fluid, coolant, engine oil) in cars, trucks and motorcycles, I've used a pipe thread sealant with TFE to lubricate and seal the threads. I've also had good success using on home plumbing.

Now I find myself with a few newly installed NPT fittings that leak a little here and there despite my careful prep and tightening. I tightened them pretty good, without over tightening them, as there were already pretty tight. Making them tighter (afraid to crack it), they still leak.

Am I doing something wrong or using the wrong pipe sealant?

Thanks,

vince



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Old 09-07-2011, 11:32 AM  
Redwood
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I use a belt and suspenders method with good results....

Apply teflon tape then teflon paste over the tape....



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Old 09-07-2011, 09:52 PM  
1victorianfarmhouse
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Thanks, Redwood. Guess it's not me then!

I used to use teflon tape until I discovered teflon paste.

I wonder if the quality of the fittings has slipped over the years? I get them from the smaller hardware stores and the big boxes (Home Depot, Lowes, Menards). I think they are pretty much all made in China or Mexico.

vince

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Old 09-08-2011, 12:22 AM  
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Quote:
Originally Posted by 1victorianfarmhouse View Post
I think they are pretty much all made in China or Mexico.
Low Quality Imports???? Never!

If that fails you can always put wicking in the thread grove....
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