Low Prices and Fast Shipping
GE Osmonics ® Purtrex PX-5-978 Sediment Replacement Water Filter # 93023 9 7/8" 5 micron. High capacity.
Water Factory CUNO 3M Reverse Osmosis Systems SQC3, SQC4 AND SQC4 PRO and replacement SQC water filters and RO reverse osmosis membranes in stock. N4000, N4500 and N5000 RO system filters. Low prices and fast shipping online since 1999. Volume discounts.
CUNO Water Factory N5000-TFC RO Reverse Osmosis Compatible Premium Replacement Water Filters and RO Reverse Osmosis Membranes. Low Prices, large selection and same day online order shipping since 1999.
Water Testing, TDS Meters and Water Test Supplies. Large selection, low prices and fast shipping online since 1999.
Replacement Faucets for 3M, CUNO, Aqua-Pure and Water Factory RO Reverse Osmosis and Under Sink Pure Drinking Water Filter Systems. Huge selection of styles and finishes in stock. Low prices and fast shipping online since 1999.
Simply enter your Feed Water TDS and RO Water TDS into the boxes above and click "Submit". The percentage of TDS Rejection will be displayed. We normally recommend membrane replacement once you drop below 75%. This may vary in areas with high TDS in the feed water.
See our selection of TDS meters under Water Tests