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Automann · Air System
177.4021
In stock · ships from Knoxville
This is a 1/4-inch manual drain cock for air tanks 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 mounts at the lowest point of an air reservoir and is opened periodically to drain moisture, oil, and sludge that can contaminate the air brake system. A simple, low-cost service component typically replaced when it becomes stuck, seized, or starts leaking.
Part Number: 177.4021
1/4 INCH DRAIN COCK
Vendor: Automann
Dealer: KP Services Crossville
Compatibility, alternatives, and more
Parts commonly needed alongside air system
