The DeWalt 5140112-90 Pressure Washer Injector Body Kit helps regulate detergent injection for efficient pressure washer cleaning performance. Designed as a replacement injector body kit, it fits compatible DeWalt pressure washers to support the proper mixing of cleaning solution with pressurized water. It works by directing water flow through the injector assembly to create the suction needed for detergent delivery during operation. This supports consistent detergent application, reliable cleaning performance, smooth fluid flow, and dependable pressure washer operation.