Pentair GRO-75EN RO Membrane

Description

The Pentair GRO‑75EN High Efficiency Reverse Osmosis Membrane is a high-efficiency thin-film composite RO membrane engineered to deliver up to 75 gallons per day (GPD) of purified water for residential and light commercial reverse osmosis systems. Built using Pentair’s GRO (Green RO) technology, this membrane provides excellent rejection performance while conserving water compared with conventional RO membranes.

Key Features & Benefits

• 75 GPD nominal output — suited for most under-sink and point-of-use RO systems.
• GRO (Thin Layer Composite) membrane — high rejection of dissolved solids with improved recovery efficiency.
• High rejection stability — maintains performance even with varying feed water conditions.
• 100 % dry membrane — long shelf life and easy storage before installation.
• Broad operating range: 40–125 psi pressure, pH 4–11, up to ~120 °F (49 °C).
• Includes permeate check valve (depending on variant) to help prevent backflow.

Performance & Efficiency

The Pentair GRO-75EN membrane uses advanced RO technology to reject dissolved contaminants and reduce total dissolved solids (TDS), improving taste, clarity, and safety of drinking water. It typically operates with a 1:1 recovery ratio, meaning it produces nearly as much purified water as waste—significantly better water efficiency than standard RO membranes.

Typical nominal specs:

• Flow: ~75 GPD (284 litres/day)
• Rejection: around 96 % of dissolved solids under standard test conditions
• Max pressure: ~125 psi (6.9 bar)
• pH range: 4–11
• Temperature: up to ~120 °F (49 °C)
• (Performance can vary slightly based on feed water temperature, pressure, and pre-filter condition.)

Compatibility

This membrane fits most residential RO systems designed for 75 GPD RO elements and standard 1812 membrane housings. It’s commonly used in Pentair LVRO-75HE, Conserv RO-75S, and similar systems, and it can often be retrofitted into conventional RO systems when paired with the correct drain-line flow restrictor.

⚠️ Before ordering, confirm your RO system’s membrane size and flow-restrictor requirements to ensure proper fit and performance.

Maintenance & Replacement

• Replace approximately every 2 years (varies with feed water quality and usage).
• Regularly change upstream sediment and carbon pre-filters to protect membrane life.

Why Choose the Pentair GRO-75EN

• Efficient purified water production with reduced wastewater
• Trusted Pentair engineering and reliability
• Suitable for a wide range of residential drinking water systems
• High rejection of dissolved contaminants for improved water quality

Keep your reverse osmosis system performing at its best with the Pentair GRO-75EN RO Membrane (4002575)—a balanced choice of efficiency, performance, and water savings for everyday purification.