All RO membranes have an optimal minimum operating pressure. The PurePro RO membranes used in all Reef Pure RO Systems have an optimal minimum operating pressure of 50psi.

The system will operate below 50psi, however, the performance of your RO membrane will not be optimal. Your system will produce more wastewater and will also result in a higher TDS reading of your RO production water. This is due to a reduced salt rejection from your RO membrane. A higher TDS reading will also deplete your DI resin much quicker than a system producing low TDS water.

The great news is that it is simple to get your system running at the optimal pressure with one of our PurePro HF-8367 RO Booster Pump and will save you a small fortune in DI resin replacement costs.

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