The AR880831 AR45 Bypass O-Ring (#20) is a precision-engineered sealing component designed specifically for AR45 pressure washer bypass assemblies. Manufactured to exact dimensions (15.54 mm x 2.62 mm), this O-ring ensures a tight, leak-free seal to maintain proper pressure regulation and protect internal pump components from wear and fluid loss. Ideal for maintenance, repairs, or rebuilds, this OEM-spec O-ring restores optimal performance and reliability in AR45 pumps used in professional pressure washing and soft wash applications. Key Features OEM replacement AR880831 Designed for AR45 Bypass Valve assemblies Size: 15.54 mm x 2.62 mm Standard #20 O-Ring Ensures proper sealing and pressure control Prevents leaks and premature pump wear Durable material for high-pressure environments Applications AR45 pressure washer pumps Bypass valve maintenance and repairs Soft wash and pressure washing systems Keep your pump operating efficiently with this exact-fit AR45 Bypass O-Ring, trusted for professional-grade performance and long-term durability.