[T3] Air compressor ?

Brion Sabbatino brionsab at msn.com
Sat Jul 25 20:55:37 PDT 2020


There should be no sealants used on compression or flare fittings.

The fitting creates the seal.

Sealants when used on these fitting frequently cause a leak.

How many times I would arrive at a job with a leaking fitting, clean off the Teflon tape or sealant, and reassemble it leak free.

Brion S
S. Utah

________________________________
From: type3-vwtype3.org <type3-vwtype3.org-bounces at lists.vwtype3.org> on behalf of William Jahn <willjahn975 at gmail.com>
Sent: Saturday, July 25, 2020 9:34:27 PM
To: type3 at vwtype3.org <type3 at vwtype3.org>
Subject: [T3] Air compressor ?

I have an older sears with a 12 gallon tank. The copper pipe from the head
to the check valve was leaking and I never noticed this. At some point
someone over tightened the compression fitting at the head and collapsed
the pipe via the brass ferrule. I replaced the check valve it was shot,
tried to clean it yet every few cycles it would leak and trip the circuit
breaker.

 I got a new pipe and 1/2" compression fittings. The new pipe I got had the
90 degree bend and I don't have sand or a tubing bender.

 I fit the new pipe and had to cut it , it was a bit longer. The trouble is
for whatever reason the pipe is not perfectly round so on each end the
ferrules both have a small gap between the ferrules and pipe it's less than
an 1/8 wide and .010" at the center the ferrules fit well into the fittings
and check valve and all around the copper tube except that one spot so it
leaks a bit only while it's running. I tried pipe tape that helped a bit.
It's not as bad as the old pipe . I know how to use a tubing cutter and I
removed the inside burrs.

 What can I use to seal the small gap? I thought I could just flow a bit of
solder in the gap or perhaps silicone like ultra copper . Something that
does not blow out. It works fine and the tank holds pressure now and does
not trip the breaker .
 I can let it be yet any leak does cause the compressor to run a bit longer
and as the pressure goes into the tank even a small leak can draw in
moisture or fine dust it creates a small vacuum.
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