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Hadley · Air System
HOO500C
In stock · ships from Knoxville
This is a Hadley (Link Manufacturing) height control valve, commonly identified by the part number H00500C.
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Verified fitment for 3 applications
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All confirmed applications for this part number.
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Other applications
Universal fit; kit includes two brackets and three lever arms to accommodate various mounting configurations. Commonly retrofitted to replace older 500-series or equivalent height control valves on most tractor, trailer, and RV air-ride suspensions.
Part data verified against 5 catalog sources
Numbers this part supersedes or interchanges with. Showing 16 of 21.
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The HOO500C is a variant kit that includes the same high-flow valve along with multiple lever arms and mounting brackets. It controls the air spring height on heavy-duty trucks, trailers, and RVs, automatically maintaining a preset ride height for proper driveline angle and stability. The valve has a normally-open dump function that requires air pressure to activate, and it's often replaced when ride height becomes erratic or the suspension fails to level correctly.
Part Number: HOO500C
HEIGHT CONTROL VALVE HADLEY
Unit: ea
Dealer: Knox Trailers
Compatibility, alternatives, and more
Parts commonly needed alongside air system
