Dcdavs RPZ

Design below requires no internal plumbing modifications on your RO system. Simply mount the booster pump between the water supply and the RO. A high pressure switch will mount on the pressurized storage tank tubing. This pressure switch cuts off power to the pump when the water storage tank reaches 40 PSI (or rated pre set pressure of the switch).

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Most revers osmosis membranes are designed to work with 60 PSI or higher water pressure, where they are tested to yield a stable rejection rate of at least 97.5%. If the water pressure feeding an RO system is less than that, the system will produce less water and at a lower quality. Additionally, production is reduced whenever the water temperature is below 77 °F. Private well systems most commonly have pressurized storage tank and pump systems with 20/40 psi or 30/50 psi on/off pressure settings. In such cases an electric pressure boosting pump must be installed to provide adequate rejection of specific health-related contaminants in the feedwater, such as nitrate or arsenic and others specified by the US EPA or local regulations.

FC-1400 kit includes a 1/4" quick connect ASO valve, pump, transformer and a high-pressure switch for RO systems upto 50 GPD.

RO water will produce cleaner ice cubes because of the purity of frozen water. So, connecting your RO to the ice maker makes a lot of sense. However, new ice makers require 30-40 PSI incoming water pressure to function properly. You may not have enough pressure at the pressurized water tank since your RO cuts the line pressure by 30-35%.

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Adding an electric booster pump increases the RO production rate, boosts the pressure tank storage volume, rejects more contaminants and increases faucet flow rate even if the reverse osmosis membrane pressure rating is met by the water supply. Residnetial RO systems work with diaphragm booster pumps that will typically increase the feed pressure upto 75-100 PSI.

Our economy pump retrofit kits ECON-50P utilize this design. Premium retrofit kit GYC-1400 also includes a pressure gauge system with a pre-filter pressure stabilizer as well as a strainer to protect the pump from sediment. Video below illustrates installing of the premium kit.

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FC-3800 kit includes a 3/8" quick connect ASO valve, pump, transformer and a high-pressure switch for RO systems upto 100 GPD.

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In certain instances, relying solely on a RO booster pump may prove insufficient to achieve the desired water pressure. Additional scenarios that necessitate supplementary equipment include:

An electric booster pump kit such as FC-1400 can very efficienty boost the line pressure up to 80 PSI. This simple low-cost setup is the most commonly used design in residential reverse osmosis industry. A differential pressure controlled automatic shut off device (ASO valve) and a high-pressure switch controlls the pump and water flow into the membrane. When the tank pressure gets up to 60% of the incoming pressure the valve internally closes off the inlet. This will build up pressure on the high-pressure switch.

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Permeate pumps use the energy of drain water flow from reverse osmosis system as leverage to push the purified water into the holding tank. Aquatec, the manufacturer of ERP-1000 permeate pump states that these pumps dramatically improve the efficiency of reverse osmosis water (RO) production, reducing wastewater by up to 80%. Permeate pumps can easily be retrofitted to upgrade existing RO systems.