The Pentair 4002574 GRO-50EN High Efficiency membrane without drain line flow control, is an innovative next-generation reverse osmosis membrane. This RO membrane uses "Thin Layer Composite technology" (TLC) to provide enhanced water recovery in an encapsulated membrane. Where traditional RO membranes have a 3:1 ratio of 3 gallons of waste water to every gallon of purified water, the GRO-50EN new technology allows for a 1:1 ratio of 1 gallon of waste water to every gallon of purified water; making it more water and energy efficient. Less waste water down the drain for the same amount of purified water means you can save money and help the environment with the same great results.

The Pentair 4002574 GRO-50EN model RO membrane includes a permeate check valve, a 96% rejection rate, 1/4" quick connect fittings and is 2.5 inches wide by 15.14" inches long with a production rate of 50 gallons per day.