Log In Log In  |  Checkout   |  33 item(s)
1 x DB40, DI Resin Refill Bag for DI210, RD322
1 x PSW-240 Aquatec Pressure Switch 40 psi shut off 1/4" tubing TSO
1 x AME-0402 Male Elbow NPT Thread w/ Quick Connect 1/4 OD 1/8 NPTF
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x AUC-0706 Union Connector 1/2" to 3/8" OD Quick Connect
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x SV-24AC-38, KSD Solenoid Valve 3/8" brass, 24V AC
1 x AUC-0404 Union Connector 1/4" quarter inch, Quick Connect
1 x 723, Feed Water Adapter with Ball Valve
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
1 x PSW-360 Aquatec Pressure Switch 60 psi shut off 3/8" tubing TSO
1 x 721, Self-Piercing Valve, Feed Water Adapter for Copper Pipe
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x Y3414PL, Garden Hose Y Adapter Plastic Valve 1/4" quick
2 x ATU-0404 TEE Union Connector 1/4" quarter inch Quick Connect
2 x 720, Feed Water Adapter with Needle Valve
1 x PSW-260 Aquatec Pressure Switch 60 psi shut off 1/4" tubing TSO
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
2 x ATU-0606 TEE Union Connector 3/8" Quick Connect
1 x 745, Garden Hose / Laundry Hose Adapter for RO/DI systems
1 x AHUC-0404 Inline Ball Hand Valve Union Connector 1/4" OD Tubing
1 x AUC-0604 Union Connector 3/8 to 1/4" OD, Quick Connect
1 x MK300, Maintenance kit for RO535, RO435, RO545
1 x FV-15, Float Valve, top-mount
1 x 226, Replacement Shower Filter
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x CBV-0404, Tank Ball Valve to 1/4 tubing
1 x FV-14, Float Valve, side-mount
1 x SV-24AC-14, Solenoid Valve 1/4" plastic, 24V AC

View Cart$414.44
Specials Log InCreate Account Checkout  Shopping Cart33 item(s)
1 x DB40, DI Resin Refill Bag for DI210, RD322
1 x PSW-240 Aquatec Pressure Switch 40 psi shut off 1/4" tubing TSO
1 x AME-0402 Male Elbow NPT Thread w/ Quick Connect 1/4 OD 1/8 NPTF
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x AUC-0706 Union Connector 1/2" to 3/8" OD Quick Connect
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x SV-24AC-38, KSD Solenoid Valve 3/8" brass, 24V AC
1 x AUC-0404 Union Connector 1/4" quarter inch, Quick Connect
1 x 723, Feed Water Adapter with Ball Valve
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
1 x PSW-360 Aquatec Pressure Switch 60 psi shut off 3/8" tubing TSO
1 x 721, Self-Piercing Valve, Feed Water Adapter for Copper Pipe
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x Y3414PL, Garden Hose Y Adapter Plastic Valve 1/4" quick
2 x ATU-0404 TEE Union Connector 1/4" quarter inch Quick Connect
2 x 720, Feed Water Adapter with Needle Valve
1 x PSW-260 Aquatec Pressure Switch 60 psi shut off 1/4" tubing TSO
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
2 x ATU-0606 TEE Union Connector 3/8" Quick Connect
1 x 745, Garden Hose / Laundry Hose Adapter for RO/DI systems
1 x AHUC-0404 Inline Ball Hand Valve Union Connector 1/4" OD Tubing
1 x AUC-0604 Union Connector 3/8 to 1/4" OD, Quick Connect
1 x MK300, Maintenance kit for RO535, RO435, RO545
1 x FV-15, Float Valve, top-mount
1 x 226, Replacement Shower Filter
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x CBV-0404, Tank Ball Valve to 1/4 tubing
1 x FV-14, Float Valve, side-mount
1 x SV-24AC-14, Solenoid Valve 1/4" plastic, 24V AC

View Cart$414.44
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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