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Hot Water Pressure Washers

180–200°F hot-water pressure washers for grease, oil, and petroleum work that cold-water units bounce off. Restaurant hood cleaners, fleet wash operations, and food-processing maintenance run hot water for a reason.

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Hot Water Pressure Washers for Grease, Oil, and Petroleum Residue Removal

When Hot Water Pressure Washing Outperforms Cold Water Cleaning

Hot water pressure washers heat the water stream to 180–200°F at the nozzle, which emulsifies grease, motor oil, hydraulic fluid, and food-grade fats that cold water rebounds off no matter the PSI. Restaurant kitchen vent hoods, automotive engine bays, fleet undercarriages, grease-trap surroundings, and food processing equipment are the standard hot-water applications. Cold water washers strip the surface contaminants — dirt, dust, water-soluble dirt — but leave petroleum and lipid residue bonded to the substrate where heat is needed to break the molecular adhesion. Operators who try to compensate with detergent volume on cold cold-water units end up with chemical cost and rinse-water disposal burdens that hot water eliminates. The OSHA pressure washing safety guidelines cover scald risk, lance handling, and PPE requirements specific to heated-water units.

Mi-T-M Hot Water Models: 343,000+ BTU/hr Diesel Burners on Belt-Drive Frames

The Mi-T-M HS-series and HMT trailer line dominate the heated-water side of this catalog. The HS-3505 family delivers 3,500 PSI at 4.7 GPM on Honda GX630, Kohler CH640, or Mi-T-M 670cc OHV powerplants, with 471,800 BTU/hr diesel burners that lift inlet water to 200°F continuous output. Step up to the HS-4004 series for 4,000 PSI at 4.0 GPM with 386,400 BTU/hr burners, or the high-flow HS-3506 at 5.6 GPM and HS-3008 at 7.8 GPM for fleet wash bays where throughput matters more than top PSI. The HMT trailer-mounts (HMT-4004-0MGV with 408cc Vanguard and HMT-4004-0MGH with Honda GX390) package the same 4,000 PSI hot water output on a DOT-approved 1,000-lb trailer for mobile contractors and on-site fleet service operators who can't stage stationary equipment. Belt-drive transmission across the HS line extends pump life past the direct-drive units common in mid-tier brands.

Related: Pressure Washers · Commercial Pressure Washers · Mi-T-M Equipment · Pressure Washers for Restaurants · Pressure Washers for Fleet Maintenance

Fuel Type Selection: Diesel Burner, Propane, Natural Gas, and Electric Heat

Hot water pressure washers use diesel as the default burner fuel on commercial and industrial models because diesel delivers the 200°F+ outlet temperature continuously without the supply-pressure variability that affects propane and natural gas at peak demand. The trade-off is fuel storage and exhaust ventilation, which is why some indoor applications (food processing, healthcare facilities, parking-garage cleaning) specify propane or natural-gas burners or fully electric heated units. Burner BTU rating matters more than the engine HP for hot-water performance — a 343,000 BTU/hr burner heats water faster and recovers temperature more quickly between trigger pulls than a 250,000 BTU/hr unit on the same pump. Mi-T-M publishes burner BTU ratings on every hot-water model so the heat output is verifiable independently of the marketing copy.

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