Detergent is supplied in several ways: built-in detergent tanks or siphon hoses, included foam cannons that mix soap with water at the nozzle, and small self-contained detergent bottles (for example, some units include a 500 ml bottle). Some models list a detergent tank without giving a capacity.
Common safety features include a Total Stop System (TSS) that shuts off the pump when the trigger isn’t engaged, GFCI‑protected power cords, and overheat/overload protection. Individual listings may include additional protections.
All listings are corded electric units. A few models note certifications such as PWMA or ETL.