This Bristan Stuart Turner shower pump is a single impeller pump designed for boosting a single water supply, offering high boost performance with low noise thanks to its anti-vibration feet. It operates with a minimum inlet water temperature of 4°C and a maximum of 65°C, and can handle a maximum of 60 starts per hour. The maximum ambient air temperature it can withstand is 40°C. Model Number: ST-PUMP20SG. Pump Type: Single speed single impeller. Power Supply: 230 V AC. Power Consumption: 215 W. Inlet Connections: Flexible hose - 15 mm push fit. Outlet Connections: Flexible hose - 15 mm push fit. Weight: 6.6579603124 pounds.