FF2 - Full Function Trailer Valve, 3.0 PSI | Haldex KN28601

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Single valve system - easy to install, maintain and troubleshoot. Built-in pressure protection and anti-compounding functions: FMVSS-121 compliant, eliminates broken foundation com ponents caused by compounding of spring brake. Space age engineering grade composites: resists corrosion, lighter and more durable than aluminum. Built-in service and spring brake quick release. Service brake priority ensures air tank pressure is sufficient to stop vehicle when spring brakes are first released. Can be used with single or twin air tanks. Technical Information Crack Pressure: 3.0 PSI Reservoir: 1/2" Control: 1/4" Supply: 3/8" Delivery (4): 3/8" OEM Number: N4304AB Show more