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.

Haltec · Air System
DS-1
In stock · ships from Knoxville
This is a flow-through valve cap designed for high-pressure truck tire service.
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.
Universal fit
Fits standard truck tire valve stems with .307-32 internal thread.
Part data verified against 5 catalog sources
Numbers this part supersedes or interchanges with. Showing 1 of 1.
Different year, make, or config? Get a confirmation against your truck in under a minute.
It lets you check tire pressure, inflate, or deflate without removing the cap, acting as a check valve that seals tighter if the core fails. The cap reduces pressure check time by 65% and handles temperatures from -40°F to 250°F. Replace it when the sealing O-ring or heat-resistant grommet wears out, or if the all-metal housing or brass components become damaged.
Part Number: DS-1
AIR THRU CAP
Unit: ea
Dealer: Knox Trailers
Compatibility, alternatives, and more
Parts commonly needed alongside air system