The Meritor S434-202-000-0 (also listed as S4342020000) is a genuine OEM double check valve for heavy-duty truck air systems. Listed under Meritor part classification AIR SYS - VALVE, CHECK-DOUBLE, this valve is sourced from the WABCO Service Parts Catalog (PB19028), confirming its place in Meritor's air system component line. A double check valve allows air to pass from either of two inlet ports to a single outlet, selecting the higher-pressure source automatically. That makes it a critical component in brake and auxiliary air circuits where two independent air supplies share a downstream line. Call us to confirm proper fit for your application.
Features
Genuine Meritor OEM part number S434-202-000-0 or S4342020000
Classified as AIR SYS - VALVE, CHECK-DOUBLE in Meritor's air systems line
Listed in WABCO Service Parts Catalog PB19028
Double check valve design selects the higher of two inlet air pressures for a single downstream outlet
Suitable for brake and auxiliary air circuit applications on heavy-duty trucks
Sold by Pro Gear and Transmission
