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  1. P4dstar

    RO booster pump advice

    I bought a 4040 RO with a HF5 membrane a few months back. My tap pressure reads approx 50psi. The RO is in the garage at the front of my house and the tap is at the back. I’ve run 15 meters of hose to the RO. Originally I had a hose reel and couldn’t get past 35PSI, once the reel was removed the actual hose gives me just over 40 PSI. This is measuring just after the prefilters and before the membrane. Once I set it to 55/45 I’m running anywhere between 30 & 35 PSI. when I bought it I had a TDS of 175-210 and got an output of 9-12. This rose over the summer & fluctuated between 210 & 420. This wasn’t too bad as I would just wait for the TDS to drop back to 210 and get 12 out but recently it’s been consistently between 350 and 410 and I’m struggling to get below 30 output. I’ve checked and tested every part of the RO and been on the phone to Doug at Daqua and I’m confident it’s all set up well. I am assuming I’m getting such a shocking output because I’m running at 30-35PSI. im considering buying a booster pump, I reckon this will pay for itself in the resin saved. Does anyone have any other suggestions and can anyone recommend a good pump. I currently use a solenoid shut off, will this work with a booster pump?
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