Your cart is empty
Browse our catalog to find the parts you need.
These images are illustrative and may not match the product exactly. Always verify by part number — or confirm instantly with the assistant using a photo or VIN.

Phillips Industries · Air System
11-338
In stock · ships from Knoxville
This is a 15-foot heavy-duty coiled air hose assembly in red, commonly used as the emergency (supply) line between a truck tractor and trailer.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 1 applications
Add your truck to see whether it's one of them
All confirmed applications for this part number.
Other applications
Other applications
This is a universal emergency/supply (red) coiled air hose compatible with any standard heavy-duty tractor-trailer setup using 1/2" NPTF gladhand connections. The 40-inch lead on one end provides extra reach. A matching blue (service) line is sold separately.
Part data verified against 4 catalog sources
Different year, make, or config? Get a confirmation against your truck in under a minute.
It features an extra-long 40-inch lead section and standard brass fittings with plated steel spring guards on each end to prevent kinking and protect the nylon tubing. The assembly transmits compressed air to release the trailer's spring parking brakes and charges the trailer air supply. You would replace this hose when you notice cracks, air leaks, or abrasion damage to maintain safe braking performance and DOT compliance.
Part Number: 11-338
COILED AIR LINE, RED W/40LEAD
Unit: ea
Dealer: Knox Trailers
Compatibility, alternatives, and more
Parts commonly needed alongside air system