Almost all of my air couplings leak lots of air. I bought them from
Harbor Freight and Home Depot. Is there any way to tight them, so
that sir doesn't leak? If not, can you recommend a brand that fits
together properly. This air leakage is driving me crazy.
I tried posting earlier... getting error messages. If this posts
twice, or similar post, sorry.
There was a time in my career when I designed quick connect couplings.
Based on that experience, will offer the following:
1) Plugs need to be case hardened to minimize scratches.
Case hardening costs money which is easy to skimp on without being
2) Very accurate screw machine tolerances are required to maintain the
seal between plug and coupling socket.
Sloppy machining works for a little while, sometimes.
You can try replacing the O-Ring in the coupling, it may buy you some
Scrap them out and start over.
If you mean leaking quick-disconnect couplings there is a little o-ring in
there that is usually the culprit (a dental pick helps when removing and
replacing these). Replace it and keep it lubed with something friendly to
o-rings and usually the leak goes away.
I USE TEFLON TAPE. Lowes has a heavier (thicker) tape for "Gas
Fittings" that may help if the tolerances of your fittings are iffy.
I also put my compressor on a switch leg so that turning off the shop
lights turns off the cohmpresor feed as well as the feed to the little
power transformers for the battery chargers and such.
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