Easy-to-use, water-tight control panel includes individual pump/burner rocker switches and thermostat controls. WEG 1725 RPM slow speed motors last longer and come with a no-questions-asked warranty. Heater coil with schedule 80 steel pipe comes with a non-prorated 5-year warranty. Stainless steel coil skin provides extra durability to withstand the elements. Rust-proof, removable, noncontaminating polyethylene fuel tank includes fuel gauge cap. Upright, oil-fired burner delivers high efficiency and maintains constant temperature using diesel fuel, kerosene or home-heating oil. Upstream detergent injection ensures high-pressure sudsing for faster, more efficient cleaning.