1year out of a 4040 ro membrane help

Discussion in 'Water Fed Pole Cleaning' started by camcap, Apr 24, 2016.

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  1. camcap

    camcap Active Member
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    hi being going for around 2 years now and think I'm looking at needing my 3rd membrane, my tap water is around 268 and now coming out of ro at 21 it's normally 12, the first ro was a hf4 4040 this current one is a hf5 4040, pre filters are replace every 3 months and membrane flushed every week I make around 400lt a day, water pressure is at 2bar, surely I should be getting longer than one year,any help on what could be wrong or is it just how long they last thanks
     
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  2. spruce

    spruce Grand Master
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    What's your pure to waste ratio whilst producing water?
     
  3. camcap

    camcap Active Member
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    I have a small hole drilled in to the waste tap valve which was done when I brought the system the chap at the shop said its how they always do it when setting up there systems so I'm guessing around 3-1
     
  4. spruce

    spruce Grand Master
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    I have a 1mm hole in my waste control gate valve which I drilled myself. It still needs to be open to get the right ratio. If the waste gate valve is fully closed I get a trickle of waste water. If I left it like that then I doubt my membrane would last long. With the r/o running you need 3 waste to 1 water or a little lower. At your tds I would say probably 2 to 1 = 2 liters of waste water to 1 liter of pure.

    If you are relying on the hole in the waste gate valve then this could be your problem.

    I believe (not gospel) that Pure Freedom drill a 1mm hole in the waste gate valve as a precaution.

    What carbon block filter are you using?
     
  5. Aquajetexteriorcleaning

    Aquajetexteriorcleaning Active Member
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    I have my 4040 at 50/50, I've had the same membrane for 4yrs. My water is about 340ppm.
     
  6. Aquajetexteriorcleaning

    Aquajetexteriorcleaning Active Member
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    Oh yeah and i only flush it once every 3 months
     
  7. Chris Dall

    Chris Dall Active Member
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    Water softener !!!
     
  8. Duncs

    Duncs Grand Master
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    only flush every three months ,i flush mine every day for 15 mins
     
  9. Duncs

    Duncs Grand Master
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    hi spruce i flush my system red tap fully open 15 mins
    then close tap fully
    when producing pure 80/20 with boaster should I not close tap fully
     
  10. Aquajetexteriorcleaning

    Aquajetexteriorcleaning Active Member
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    Well mines 4yrs old and still going. Maybe your just wasting water.
     
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