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Post Onsite · Air System
321P2
In stock · ships from Knoxville
A 1/8 inch NPT brass drain cock used to manually drain moisture and oil from air tanks, air dryers, or other compressed air system components on heavy-duty trucks and trailers.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
We don't publish fitment for this part yet. Rather than guess, get it confirmed against your truck in under a minute.
It threads into a 1/8" NPT port and is opened by turning the handle to release accumulated liquid, preventing corrosion and freezing in the air system. Replace if the valve leaks, seizes, or the handle breaks.
Part Number: 321P2
1/8 DRAIN COCK
Unit: ea
Dealer: Post Onsite
Compatibility, alternatives, and more
Parts commonly needed alongside air system
