Seller notes

This is a new Haldex Midland RT4 Multi Function Trailer Valve KN26020 Meets all FMVSS-121 trailer requirements for spring brake control and other regulations from October 1992 to present.Interchangeable with competitive units. Used on trailers to control both parking and emergency brake functions. Controls reservoir charging. Applies emergency (parking) brakes upon loss of trailer supply (emergency) line pressure. Trailer Supply (A): Plugged Trailer Supply (B): 3/8" Trailer Control: 3/8" Reservo...

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