55/58 Automatic Pressure Switch for Car Wash Pressure Washers Key benefits — why you need it Automatic stop/start control: The switch automatically stops the pump when you release the trigger and immediately restarts when you pull the trigger again. This reduces unnecessary run time, saves energy, and helps extend motor and pump life. Simple, reliable operation: No manual reset or extra controls needed — ideal for busy car wash bays or mobile cleaning setups. Durable and compatible: Built from grade plastic and brass, with M22*1.5 internal and external threads to fit standard pressurewasher fittings. What it does and how it solves problems Eliminates pump idling and overheating by sensing flow/pressure changes and cutting power when the trigger is released. Reduces water and electricity waste and lowers maintenance by preventing continuous motor operation when the gun is not in use. Improves safety and convenience by providing automatic electrical control without constant operator intervention. Key features Model: 55/58 car wash pressure switch device. Automatic pressure sensing for immediate stop/start based on trigger use. Materials: grade plastic housing with brass components for corrosion resistance and long service life in wet environments. Threading: M22*1.5 both inside and outside for straightforward compatibility with standard connectors. Installation: No debugging required. Comes with a simple 220V temporary wiring solution in the instructions for quick setup. Recommended for longterm installations: add an AC contactor and leakage protector (not included) for enhanced electrical safety. Performance and compatibility Designed to withstand frequent cycles typical in commercial and residential car washing. Reliable operation in wet and humid conditions thanks to robust materials and construction. Works with most pressure washers that accept M22*1.5 fittings and operate on 220V systems. Practical use scenarios Selfservice car wash bay: Automatically stops the pump when users release the spray gun, reducing wear on station pumps and lowering utility costs. Mobile detailing or fleet washing: Provides hands restart and shutdown, improving efficiency for operators who move between vehicles. Home pressure washer upgrade: Adds automatic control to reduce motor runtime and simplify operation during routine cleaning tasks. Safety notes Use the included 220V temporary wiring instructions for initial setup. For permanent installations, install an AC contactor and a leakage protector (not included) to meet local electrical safety requirements. Compatible, simple, and built for repeated use — the 55/58 automatic pressure switch gives direct automatic control over your pressure washer to save energy, reduce wear, and streamline operation.