Remanufactured Emergency Relay Valve , Suitable for pre-121 trailers, converter dollies, or exempt trailers. , Has automatic bleed down feature. , Approximate Weight 3 lbs. , FOR USE IN AIR HYDRAULIC SYSTEMS ONLY - DO NOT USE THEM TO CONTROL SPRING BRAKES Notes
3/8"-18 auxiliary reservoir port on bottom of valve drilled and tapped for use in air hydraulic systems. Do not use them to control spring brakes. , Repair Kit use part number RN10HL.