Feature●? Shower Drain Box With 1100 Gph Pump 12V●? 1-1/8" Hose Barb discharge port.●? Threaded Inlet Port Fittings. Improves ease of installation.●? Simple Installation. Easy access side rails plus additional rear bracket option.●? Fast Fix System. Lid, pump, filter and float switch can be removed and serviced without tools.●? 1100 GPH Pump. High capacity pump to cope with incoming grey water.Description 99B Shower Drain Box with 1100 GPH Pump - 12V. This compact, full-capacity shower drain system provides 1100 GPH (4164 LPH) of output. Activated by a float switch, it turns on as the tank fills and shuts off when it s empty. It has three inlet ports that offer varying combinations for the inlet hose, as well as a quick-release tank lid and an easy-clean internal strainer..