Check Valve. Sealed polycarbonate lid – tough impact resistant material with gasket to prevent water splash. Fast fix system – Lid, pump, filter and float switch can be removed and serviced without tools. Threaded port fittings – improves installation by offering several combinations of port fittings including 3/4″, 1″, 1 1/8″, straight and 90� elbow fittings. Back flow prevention – Reduces the amount of water that can siphon back to shower box. Discharge hose diameter: 3/4″. Dimensions: 9-1/2″ W x 9″ L x 5″ H. 800 GPH.