The Meritor S471-003-020-0 or S4710030200 is a genuine OEM Emergency Relay Valve for heavy-duty truck air systems. Listed under the WABCO Service Parts Catalog (PB19028) and sourced through Meritor, this valve is the factory-correct replacement for the emergency relay function in air brake and air system circuits. Emergency relay valves control air pressure delivery and exhaust in response to tractor protection or trailer supply system demands. Buying direct from Pro Gear and Transmission means you get the genuine Meritor part, not an approximation. Call us to confirm proper fit for your application before ordering.
Features
Genuine Meritor OEM part, cataloged in WABCO Service Parts Catalog PB19028
Part type: Emergency Relay Valve, air systems application
Part number S471-003-020-0 or S4710030200
Direct factory-correct replacement for emergency relay valve function in air brake circuits
Sold by Pro Gear and Transmission
