Bit of help please

Discussion in 'Water Fed Pole Cleaning' started by camcap, Apr 22, 2015.

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  1. camcap

    camcap Active Member
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    hi I have a 4040 system and seem to be getting 29 ppm after the ro, it used to be about 12, I am over due changing the carbon and sediment filters so could the be the cause of the higher ppm reading, and might this of damaged the ro membrane.
    Also I live in a low water pressure area ( takes 8-9 hours to fill a 500lt tank ) would I be best with a HF4 or HF5 membrane. Not really wanting to add a booster pump for the moment. Thanks for any help
     
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  2. Jake

    Jake Grand Master
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    Yep time to change filters me thinks! Also a booster pump would make a massive difference
     
  3. camcap

    camcap Active Member
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    Ro membrane to ?
     
  4. Jake

    Jake Grand Master
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    I reckon just pre filters to start with...
     
  5. camcap

    camcap Active Member
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    Cool I've ordered them been reading up on booster pumps and some say you can't use them what's the score with them
     
  6. peter rogers

    peter rogers Grand Master
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    u can use them all right it makes pressure stronger going thru filter meaning more pure water
     
  7. spruce

    spruce Grand Master
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    Changing the prefilters will not improve your TDS output on their own. However, if your sediment filter was blocked with sediment and you were getting a reduced flow through them then replacing them will make a difference. I agree with the other posters and replace them first.

    A 10" Fiberdyne combination carbon block/sediment filter with process 38000 litres of tap water and a 20" will process twice that according to manufacturers specs.

    Our 4040 is at about a 50/50 pure to waste ratio and our Fiberdyne 20" lasts us 3 months. We still use a sediment prefilter and can change that as often as once a month when our water is 'dirty'. A 'dirty' sediment filter reduces water flow through it by quite some margin.

    http://gardinerpolesystems.co.uk/al...e-cfb-plus-sediment-carbon-pre-filter-10.html

    http://gardinerpolesystems.co.uk/al...e-cfb-plus-sediment-carbon-pre-filter-20.html

    Just to show you how careful you need to be, I have a 20" GAC-20R-C Coconut shell carbon filter in my office.
    It has a service life of 2500 US Gallons (= -+ 10000 liters). We would be replacing them every 10 days.

    This carbon block 20" carbon block filter has a service life of 22,000 litres. 3 of those are much more expensive that 1 only 20" Fiberdyne carbon block prefilter.

    Our water pressure is 50psi and we use an HF5 membrane. Its more expensive but is working for us. We get about 2 liters of pure a minute. We don't use a booster pump.

    You need a decent size booster pump to cope with a 4040. The little ones they supply for RoMan type r/o's will not pump enough water.

    GAPS water recommend this.
    https://www.machinemart.co.uk/shop/product/details/cbm240e-1in-multi-stage-230v-booster-pum
     
  8. Smurf

    Smurf Banned
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    With a booster pump not only will it make your ro more efficent it will more than halve you current pure production time to fill your 500 litre van tank. That's assuming the membrane and filters are in good condition..

    How often do you backfush the ro?
    And what is your tape tds ppm?
     
  9. camcap

    camcap Active Member
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    Tap tds is around 198
    And to be fair I don't flush it enough probs once a month
     
  10. spruce

    spruce Grand Master
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    That's a rejection rate of 87%. That's worse than a Merlin. At that efficiency I would guess that the membrane isn't working properly either.
     
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