Merlin RO new one

Discussion in 'Water Fed Pole Cleaning' started by Neil, Feb 2, 2014.

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  1. Neil

    Neil Grand Master
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    I have a Merlin RO had it for 2 years and now the reading of the water coming out of the blue tube is reading 0021 when I first bought it it was coming out at 0012 does this mean I have to change my pre filters or is it the other filter I have to change? I haven't really got a clue about the filters lol
     
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  2. Smurf

    Smurf Banned
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    So you have never changed the filters or back flushed the ro in 2 years :eek:
    Myself I would say the ro membranes must be knackered by now but you could try changing the filters first to see if it makes any difference.
     
  3. Duncs

    Duncs Grand Master
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    pure freedom told me the pre filters had to be changed every three months
    whats back flush smurf
    is it flushing before you start purifying your water
     
  4. Smurf

    Smurf Banned
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    Yes Duncs but should be done weekly too for at least 1/2 hour
     
  5. spruce

    spruce Grand Master
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    Unfortunately Merlins aren't flushable Smurf. There is/was a separate flush tank that used to be available. They are still listed on American sites. It was pressurised from the pure side and once the r/o switched off the pressure 'forced' pure water back through the membranes to waste.

    The first filter is a chlorine block filter and needs to be changed regularly, depending on the amount of water you process. As Merlins aren't renowned for water economy most of your dechorinated water goes to waste, (my mate's Merlin has a waste to pure ratio of 5 to 1) you need to change them (chlorine block) more often. Chlorine destroys membranes.

    At the best of times a Merlins will have an efficiency of 90% which will deteriorate with age. So resin costs are always going to be higher than other r/o's.
     
  6. Smurf

    Smurf Banned
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    Yes I kmow spruce but that's another good reason why I never bought a merlin ro because of the cost of that poxy flush tank kit
     
  7. Neil

    Neil Grand Master
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    Hmmm I best go to cleaning spot this week and sort it out : /
     
  8. spruce

    spruce Grand Master
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    #8 spruce, Feb 6, 2014
    Last edited: Feb 6, 2014

    :) Sorry.

    You also forgot to add:

    The flush tank doesn't work very well even when you could get it.
    Poor efficiency means higher resin costs.
    High waste water means much higher water bills if you are on a meter.

    No wonder they were so cheap.
     
  9. Smurf

    Smurf Banned
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    Very true mate
     
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