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It could be the pressure of the incoming water from the town, and not as a result of the RODI unit. My pressure is usually around 43psi (in the winter). Since warm weather started, coming in, it slowly dropped to around 30-35psi. Making water is SLOOOOOOOOW. I even changed my sediment filter out. Zero impact. My membrane is brand new too.
I borrowed an RODI booster pump from a friend... instantly I was up to 75+psi and I made over 245gals of water for my new system over a few days using a 75gpd rodi.
I haven't bought a booster pump yet, but it is on the top of my list. If my pressure is 45psi or above normally though, I probably wouldn't look at a booster.
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245 gals*: <Displays>: 125g 6' + 40breeder <Sump>: 80g combined (60g sump+20g fuge) <May2012-Present>
RETIRED - 29g, 80+# LR, 2" SB ~15g sump <Jan2010-May2012>
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