iSpring Greatwell Reverse Osmosis Membrane 100 GPD 11.75” x 1.75” – Fits Standard Under-Sink RO Systems | MC1

Overview

The iSpring Greatwell Reverse Osmosis Membrane is a high capacity 100 GPD element designed for standard under sink RO systems. Its advanced 0.0001 micron barrier lets water molecules pass while substantially reducing a broad range of contaminants. This replacement part is built for daily use, delivering refreshed water without sacrificing efficiency or reliability.

What this membrane removes and how it helps

In testing scenarios, the membrane can remove up to 99 percent of more than 1,000 common contaminants. Lead reduction can reach up to 98 percent in typical feed water. Other targets include chlorine, fluoride, arsenic, asbestos, calcium, and sodium. The extremely fine barrier favors water molecules while keeping dissolved substances out, and the system delivers TDS rejection up to 97 percent under standard NSF58 style conditions.

• Lead reduction up to 98 percent where present
• Chlorine, fluoride, arsenic, asbestos, calcium, and sodium addressed
• 0.0001 micron pore size enables selective filtration
• TDS rejection up to 97 percent in tested conditions

Size, fit, and daily production

The membrane measures 11.75 inches by 1.75 inches, a standard size that fits most under-sink RO housings. With a production rate of 75 GPD, it supports households of various sizes, helping ensure clean drinking water is available on demand for everyday hydration and cooking.

• Standard 11.75 x 1.75 inch format
• 75 GPD capacity for steady supply
• Easy replacement in compatible housings

Warranty, support, and replacement guidance

Register online to activate the manufacturer warranty and enjoy lifetime free technical support. If you encounter issues, the iSpring team is ready to assist. Replacement is typically 2 to 3 years, depending on water quality; very hard water (above 750 ppm) may benefit from customized solutions.

• Online registration unlocks warranty
• Lifetime free technical support
• Estimated 2 to 3 year replacement interval
• Consider customized options for very hard water

Real world use and everyday benefits

In daily use, you may notice a crisper, cleaner taste and improved water feel for drinking and cooking. This membrane is designed to be a practical upgrade for households seeking better water quality without a complicated setup. It offers a practical path to improved water performance while keeping expectations aligned with typical home usage.

Note that performance is influenced by your source water. If your supply is very hard or contains unusually high levels of dissolved solids, consult support for tailored guidance before replacement.