Pentair GRO-75EN 1:1 Reverse Osmosis Membrane Replacement Filter – 75 GPD High-Efficiency RO Cartridge with Flow Control, Check Valve and Quick Connect Fittings for Under-Sink Water Filtration 4004425

The Pentair 1:1 Reverse Osmosis Membrane offers exceptional performance for high-efficiency water filtration in residential and light commercial reverse osmosis systems. With its Thin Layer Composite (TLC) technology, this replacement membrane cartridge uses an innovative 1:1 permeate-to-concentrate ratio, reducing wastewater production while delivering consistent output for under-sink water filtration systems. The 75 GPD flow rate supports steady capacity for daily use, making it ideal for home drinking water systems, bottle fillers, and genuine replacement countertop filtration assemblies. This reverse osmosis filter membrane incorporates built-in components such as a permeate check valve and drain-line flow control, simplifying installation and supporting efficient system circulation without additional parts. With a 96% rejection rate, this membrane supports clean-tasting water when used as part of a complete multi-stage system with genuine carbon filters, post-filters, and optional remineralization cartridges. Designed as a long-lasting replacement part, it typically requires replacement every 24 months depending on water quality and system demand. Whether you’re upgrading an existing setup or replacing an older cartridge, the Pentair 1:1 membrane is a genuine replacement component for reverse osmosis filtration machines requiring dependable flow, efficient operation, and compact under-sink installation.

• High-Efficiency 1:1 Water Filtration Design: Designed with advanced Thin Layer Composite technology, this 75 GPD reverse osmosis filter membrane features a 1:1 ratio of filtered water to wastewater, helping minimize water waste and improve performance in replacement under-sink water filter systems. An excellent upgrade for households looking to optimize their drinking water filtration system.
• Long-Lasting Performance for Consistent Use: Designed for durability and optimal performance, this replacement RO cartridge offers a service life of up to 24 months, depending on incoming water quality and daily usage levels. Ideal for use in residential and light commercial filtration systems, it helps reduce maintenance frequency while supporting your home’s water filtration needs over time.
• Built-In Flow Control and Check Valve for Easy Installation: This membrane is encapsulated with an integrated permeate check valve and drain line flow control, eliminating the need for separate external parts. These built-in features help regulate flow rates and simplify installation of genuine fittings for reverse osmosis system cartridges with direct-connect fittings.
• Slim, Compact Dimensions for Easy Fit: Measuring 15.14" in length and 2.5" in diameter, this replacement membrane cartridge is designed for tight spaces and fits easily into most standard under-sink RO housings. Whether you’re replacing an old filter or building a new system, this component supports easy integration into existing home clean water machines without layout changes.
• Enhanced Filtration Performance: The Pentair GRO-75EN membrane provides an exceptional 96% rejection rate, efficiently supporting multi-stage reverse osmosis filtration systems used for household drinking water, bottle fillers, and genuine replacement countertop or under-sink filtration setups.