The Hotsy 9400 Series hot water heater module lets you add hot water cleaning performance to an existing cold water pressure washer without replacing your entire system. Designed for pressure washers delivering 6–10 GPM and up to 3,200 PSI, the 9400 Series is ideal for industrial facilities, fleet maintenance, manufacturing plants, food processing operations, and equipment wash bays where hot water is essential for removing grease, oil, and stubborn buildup.

Available in oil-fired and natural gas-fired models, the 9400 Series uses Hotsy's high-efficiency vertical heating coil to quickly heat pressurized water for faster, more effective cleaning. A built-in flow switch automatically controls burner operation, while 115V power and ETL certification make installation straightforward. Whether you're upgrading an existing stationary pressure washer or building a custom cleaning system, the 9400 Series provides a reliable way to add hot water performance.

9400 Series Models