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PAI · Air System
802649
In stock · ships from Knoxville
This is a pressure protection valve designed to safeguard your truck's air brake system.
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Verified fitment for 1 applications
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All confirmed applications for this part number.
Mack Trucks
Mack Trucks
Commonly listed for Mack models but also used on various heavy-duty trucks where a 75/70 psi pressure protection valve with 1/4" NPT ports is required.
Part data verified against 3 catalog sources
Numbers this part supersedes or interchanges with. Showing 16 of 16.
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It automatically closes when supply pressure drops below 70 psi, isolating accessory circuits and preserving enough air for braking. The valve opens at 75 psi to allow airflow to secondary components like dump bodies, tag axles, or PTO controls. Replace yours if your air system loses pressure unpredictably or you experience premature low-air warnings when running auxiliary equipment.
Part Number: 802649
PRESSURE PROTECTION VALVE
Dealer: Post Onsite
Compatibility, alternatives, and more
Parts commonly needed alongside air system
