I find the best flow restrictor to be a ball valve. With a PSI gauge on the input of the membrane you can adjust the ball valve so that the pressure on the membrane is to spec.
The 150gpd may have good rejection rate but needs 65psi to the membrane in order to acheive this. Most city homes will not have this kind of pressure and a booster would be needed. The 75gpd is the most popular membrane because it also has a high rejection rate that only needs 50psi to acheive which is great for most city homes and you would not need a booster to reach 50psi.
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06-07-2010, 02:23 PM
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