4 Stage Reverse Osmosis RO Pure Drinking Water System
Regular Price: $269.99
Special Price $179.99
Stainless Steel Tankless Reverse Osmosis Drinking Water RO System
Regular Price: $399.99
Special Price $249.95
Pentek RO-2550 RO 50 GPD 4 Stage Reverse Osmosis RO System
Regular Price: $259.99
Special Price $159.99
GGN-FAUCET-DUAL-502 Hot and Cold Stainless Steel Dual Temp Drinking Water Faucet
Regular Price: $199.99
Special Price $129.00
Chiller Daddy CHL-501 Undersink Water Chiller
Regular Price: $499.99
Special Price $349.99
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Easy TDS Membrane Performence Calculator
See If It is Time To Replace Your Membrane
Simply enter your Feed Water TDS and RO Water TDS into the boxes above and click "Submit". The percentage of TDS (total disolved solids) 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. Let the tap water and reverse osmosis water run for a few seconds before drawing your sample.
See our selection of TDS meters under Water Tests. Knowing the rejection rate is the only wat to know if it is time to replace your reverse osmosis membrane.