SumpJet Water-Powered Back-Up Sump Pump pro_14308 Valves are used in pairs

Valves are used in pairs and feature 1/2" NPT threaded connections

Weight: 8 lbs

and there's an on-off switch on the circular wall plate

Bulb type: one A19 medium 100-watt light bulb (not included)

Swivel rockers perform a smooth 360-degree spin and gentle rocking motion

SumpJet Water-Powered Back-Up Sump Pump pro_14308 Valves are used in pairsThe compact SumpJet Water Power Back Up Sump Pump works off your municipal water supply in conjunction with your primary sump pump and requires no electricity to operate. Removes 2 gallons of water for every 1 gallon used (based on a 5 foot lift). Fully assembly unit features a built in screen with removable foot valve and an adjustable stainless steel hose clamp for easy mounting. Requires an uninterrupted water source to operate. If you have a well