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Link Manufacturing (Hadley type) · Air System
HOO500CA
In stock · ships from Knoxville
A height control valve for air-suspended trailers. It automatically maintains a set ride height by metering air into or out of the suspension, and includes an integral dump feature that exhausts air when pilot pressure is released, lowering the trailer for loading/unloading.
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Designed for trailer use only; not for tractor applications.
Part data verified against 5 catalog sources
Numbers this part supersedes or interchanges with. Showing 11 of 11.
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This is a high-flow 500‑series design known for reliable leveling and repeatability. Replacing a worn or leaking valve restores proper suspension geometry and ride quality.
Part Number: HOO500CA
HEIGHT CNTRL VLV W/ DUMP
Unit: ea
Dealer: Knox Trailers
Compatibility, alternatives, and more
Parts commonly needed alongside air system
