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PENTAIR GRO-75EN - 1:1 Super High Efficiency, Encapsulated Reverse Osmosis Membrane -

PENTAIR GRO-75EN - 1:1 Super High Efficiency, Encapsulated Reverse Osmosis Membrane

Regular price $49.58 Sale

If water waste is your concern with reverse osmosis process and saving water is your goal, Pentair™ GRO-75EN (Also available in 36 and 50 GPD) Reverse Osmosis Encapsulated semi-permeable membrane is a high efficiency, 75 Gallons Per Day (GPD) encapsulated reverse osmosis membrane that reduces water waste by nearly 50%.

Pentair Residential Membranes use an industry leading state-of-the art TLC (Thin Layer Composite) membrane providing high quality water for a broad range of water chemistries. Each membrane is required to meet our factory's strict performance requirements prior to shipment. Encapsulated membranes already come with quick connect fittings on the housing. These membranes use less waste water with a near 1:1 ratio.

Reverse Osmosis is the process by which water molecules are forced by your household water pressure through GRO-75EN semi-permeable membrane. Contaminants are rinsed to the drain with a reverse osmosis water purifying system, while your high quality drinking water is stored in the holding tank ready for drinking on demand.

Video below shows how 1:1 water ratio / high recovery rate works using Pentair GRO-75EN



  • 75 GPD - Gallons Per Day (GPD)
  • This membrane requires a 200 mL flow restrictor
  • Double the recovery rate - 1:1 Water Ratio!
  • High rejection stability at high input TDS 
  • TDS reduction of 93-98% of minerals, salts, contaminants in your potable water
  • Thin Layer Composite Membrane (TLC)
  • 100% dry membrane maximizing shelf life (indefinite shelf life)
  • Available with or without a drain line flow control
  • Capillary style drain line flow control kits available and sized for each GRO mode supply. 
  • Innovative Design
  • 2 Year Warranty
  • Conserves Water
  • Saves Money
  • Maximum Pressure: 125 PSI (6.90 bar)
  • Maximum Temperature: 120o F (49o C)
  • pH: 4-11
  • Free Chlorine: 0.1 ppm

Filters and membrane elements are not to be installed on microbiologically unsafe water supplies. TLC Membranes are not certified to sanitize water, remove cysts, bacteria, or viruses. Filter and membrane element performance can be affected by fluctuations in water quality.

In order for this membrane to provide 1:1 water ratio, you need a flow restrictor. Please choose a membrane with flow restrictor included from the dropdown above or if you need bulk orders, follow the link here flow restrictor

4004446 Kit | GRO-36EN | 100 ML/MIN 25
4004447 Kit | GRO-50EN | 150 ML/MIN 25
4004448 Kit | GRO-75EN | 200 ML/MIN 25

Note: On September 14th, 2018 this membrane and all other Pentair products will increase 4-8% due to inflationary costs. Price increases will be implemented nationwide and are passed on by manufacturers. These 100% dry membranes have an infinite shelf life if stored properly, buy in bulk now and save!