Merlin ro system? help please

Discussion in 'Window Cleaning Tutorials & DIY' started by Newtothegame, Nov 16, 2014.

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  1. Newtothegame

    Newtothegame Member

    Apr 11, 2012
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    I changed my resin last month, I'm in a hard water area but my tds meter is already testing my water between 0.4 - 0.9? Does anyone know what it could be? Do filters need regular cleaning or maybe need to be replaced? I'd appreciate if anyone could help and shed some light.
  2. abs

    abs Guru

    Jun 4, 2014
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    I'd say your ro is working perfect with them figures, you may simply need to change your resin more frequent or get a larger cannister
  3. best

    best Active Member

    Feb 25, 2012
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    Pre filters need to be changed every 6 months
    You need to use a water softener and regenerate very regular ,( every 300L I use a 6L canister of softener, then regenerate)
    water pressure needs to be at least 40, but higher will give you better tds readings
    I use a 6 litre Di canister to polish the water , that will last me 6 month @ 500L per week
    Dont over pack the DI resin other wise it forms chanels and you dont use it all, shake the vessel to use all the DI when the ppm starts to rise. I change the DI resin when it reaches 002ppm

    this is how I have used my merlin for the past 7 years in a hard water area. Still on the same Membrane
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