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Automann · Air System
170.DC4474
In stock · ships from Knoxville
A double check valve (also called a two-way check valve) that accepts air from two separate sources and delivers the higher-pressure signal to a single outlet while preventing backflow between the sources.
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Verified fitment for 1 applications
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All confirmed applications for this part number.
Freightliner
Freightliner
Universal fitment based on port configuration and function. Verify that the supply port (1/8" NPT male) and delivery ports (two 1/4" push-to-connect) match your air line requirements.
Part data verified against 3 catalog sources
Numbers this part supersedes or interchanges with. Showing 4 of 4.
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It is commonly used in heavy-duty truck air brake systems to supply the trailer hand control valve from both the primary and secondary circuits. This Automann part is an aftermarket equivalent of the Freightliner/Norgren double check valve AI38000404474.
Part Number: 170.DC4474
DOUBLE CHECK VALVE
Dealer: Knox Trailers
Compatibility, alternatives, and more
Parts commonly needed alongside air system
