Uncompromising water quality when cost is the main consideration. The WW-4040 and WW-4021, fiberglass-wrapped, set a new standard in quality and performance for economical RO membranes, making them the perfect choice for the price-conscious market.

With 98.5% rejection rates, they outperform many established membranes in pure water production, while also beating entry-level imported alternatives on both price and build quality.

This membrane is ideal for any business that requires a high percentage of filtered water with a crystal-clear finish.