Versatile Replacement Pump Tested, 3400 PSI Power: Uncharted Matchups for Serious Use We recently incorporated the Biswing Pressure Washer Pump into our lineup, intrigued by its 3400 PSI max output and 2.5 GPM flow, especially given its compatibility with major brands like Honda and Simpson. What caught our attention was how seamlessly it adapted to our existing setups, even in uncharted matchups with Subaru and Craftsman engines. The 7/8” shaft vertical plunger design delivered consistent performance, handling everything from stubborn dirt to mild grease without missing a beat. Our testing confirmed its durability, though we did note minor adjustments were needed for optimal efficiency with smaller engines. For serious users seeking a reliable, versatile replacement, the Biswing pump offers a compelling balance of power and adaptability. It’s an overlooked gem in the pressure washer world.