A-B1317897GS-AI KIT-CHECK VALVEOne New Aftermarket Replacement Check Valve Kit Fits Briggs & Fits Stratton Pressure Washers This check valve kit is a direct replacement for the pressure washer pump on Fits Briggs & Fits Stratton (B&S) and compatible equipment. The check valve controls one directional fluid flow within the pump, preventing backflow and maintaining consistent output pressure. A failed or worn check valve typically causes loss of pressure or pulsating output. This kit