Log In Log In  |  Checkout   |  29 item(s)
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
2 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x CP-OR55, O-RING FOR MEMBRANE FILTER HOUSING WaterGeneral Systems
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x DI210, Heavy-duty DI system for Aquarium and Reef
1 x FKD-66, Replacement Filter Pack SED2005 CB2010 DB40 for RD322
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x CP-KOR24, O-RING Oring FOR KOOLERMAX MEMBRANE FILTER HOUSING
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 213, 5th stage inline carbon postfilter (replace every 12months)
1 x SC445, Specialty Filter SPECIAL ALKALINE FILTER Specialty Filter
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x SW SHELL, Countertop SW1 Empty System Only No Filter
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD150
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x 213, 4th stage inline carbon filter (replace every 12 months)
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)

View Cart$1,040.44
Specials Log InCreate Account Checkout  Shopping Cart29 item(s)
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
2 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x CP-OR55, O-RING FOR MEMBRANE FILTER HOUSING WaterGeneral Systems
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x DI210, Heavy-duty DI system for Aquarium and Reef
1 x FKD-66, Replacement Filter Pack SED2005 CB2010 DB40 for RD322
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x CP-KOR24, O-RING Oring FOR KOOLERMAX MEMBRANE FILTER HOUSING
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 213, 5th stage inline carbon postfilter (replace every 12months)
1 x SC445, Specialty Filter SPECIAL ALKALINE FILTER Specialty Filter
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x SW SHELL, Countertop SW1 Empty System Only No Filter
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD150
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x 213, 4th stage inline carbon filter (replace every 12 months)
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)

View Cart$1,040.44
Information

Draining water ratio: 1:3:

The ratio of product to waste is a production rate to drain rate. If you put a pressure tank and measure how much waste water to fill the pressure tank, then the calculation is different. This ratio will be changing as it fills up the tank, since the drain rate is fixed at 500mL/min. and the production is decreasing as the tank fills up. So when the tank is empty, the ratio is 1:3, then as the tank fills up, it will be 1:4, 1:5 then it goes higher
until the tank is full.

Why did this happen? The pressure from the tank is pushing against the water. when the tank is empty, the tank pressure is 7 psi, as the tank fills up it goes higher so when the tank is almost full it can reach about 35 to 45 psi, so If you have 55 psi going into the RO, the net pressure across the membrane is 55-40 = 15 psi, that's why the system makes water slowly at the end.

If you wish to have less waste, you can purchase a smaller flow restrictor, so it limit the amount of water
going to the drain. However, there is a trade off. If you have less drain water, then the stage #4 membrane filter needs to be replaced more often. Also the TDS reading will be about 5 to 10 ppm higher after the 4th stage membrane. So you need to refill the DI resin more often.

The production rate of a RO system depends on your input pressure and water temperature, so when we say the ratio is 1:3 this is only approximation, it is not fixed. It depends on your water supply.

If you want the membrane to last longer, then have more drain. If saving water is more important, then use smaller flow restrictor and less drain. If you want both, then you need to add a booster pump or a permeate pump to the RO system.
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