Is it true you should run water as slow as possible through DIs?

Discussion in 'Water Fed Pole Cleaning' started by slippy, Jun 29, 2016.

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  1. slippy

    slippy Well-Known Member
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    Does a DIs resin last longer if you run the water through it slowly? I am thinking of using running water through mini bore to my twin/triple DI set up. My local TDS is 240-310, but I can't use an RO because I live in a flat.

    With this kind of set up where the DIs change around; the first one becomes the second one etc how do you guys remember which is the first DI and which the second? Write on it in pencil?

    Also, I heard that cleaning to a TDS of 15 is fine. I also heard it depends on the area not just the TDS level. This affects what actually is in the total dissolved solids (TDS) I live in Poole/Bournemouth anyone know if this area is ok to clean at a TDS of 15?
     
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  2. Poles Apart

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    I just write 1 and 2 with a permanent marker on the top. I'm changing resin today it's gone up to about 0.03 I normally let it go up to 0.10 but not sure I'd let it go up any further? As for resin longevity it's reported that processing water slowly is beneficial but not sure by how much, I normally leave it on all day running into a butt.
     
  3. Marko067

    Marko067 Well-Known Member
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    Try cleaning your own windows with it and see. Choose a sunny day so it will highlight any problems. I cleaned for a day once with it at .036 due to an error I didn't catch till too late. I had no complaints. But I absolutely do not recommend it. I try to keep mine between 000 and 005. Where I am in Essex I have no problems with that.
     
  4. daveyboy

    daveyboy Legend
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    I've been cleaning for 2 weeks now with 004-005 with no issues
     
  5. mark m

    mark m Hero
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    run it as slow as you can and 15ppm will be fine you are only up the road from me so if you need any help give me a shout
     
  6. doug atkinson

    doug atkinson Well-Known Member
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    No one can advise you on the spotting issue as each water structure is different up and down the country. In Scotland which has the softest water 025 ppm guys straight away see spotting at around 007 ppm. Not noticeable on a cloudy day but as soon as the sun hits the glass clearly visible. Metal minerals and sodium in water cause spotting so you really don't know what is in your water unless you get it analysed in a lab. My advise it's your business so don't risk up the reputation that you build and be safe.

    As you water is hard a strong based resin will be suitable for your ppm and you can run off the first 800 litres with no problem at tap flow rate. As soon as the ppm creeps up slow the flow rate down and give the vessel a shake and you will get a couple of 100 litres more. Weak base resin with the likes of Unger, Ionic, Indion, Tulsion MB-111 are not suitable at high ppm.
     
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  7. spruce

    spruce Grand Master
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    I agree with Doug. We can't get away with anything above 7 where we live on Teesside.

    I believe that our customers can see spots from inside before we see them from the outside. I'm also of the opinion that when you have been cleaning for a while and they are happy with the quality of the job, customers don't check the results like they do when you first start.

    Also if you have done a good job with each previous clean, a slip up as per Marko067 is usually ignored by the majority of customers.

    -
     
  8. Den

    Den Forum Addict
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    Hello Mark Im assuming we are both using hanningfield resevoir, what's your ppm before and after RO.

     
  9. slippy

    slippy Well-Known Member
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    Maybe a thick pencil/carpenters pencil is better, with permanent marker you will constantly be rubbing it out and writing next to it. 1 crossed out write 2 then 2 crossed out then 1 look a right mess
     
  10. Alien Human

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    Slippy - are your di vessels in your van purifying or do you fill up at home and put pure into the tank?

    If there not in the van then have you thought about putting them in the van? ........much easier

    So you'd full tank in van with tap water - pump - pre pre di vessel - pre di vessel - di vessel and then out through your hose to clean windows.

    When I fill up my gardiners back pack with pure from the van I just turn the pump up to full throttle (99 flo) and crack on - always comes out pure.

    As soon as the pure goes above 0ppm I change over one of the 3 vessels. Like knowing I'm using nothing but pure and they all just move along to become a pre filter vessel anyway. Your really not going to be saving much £ by watching the ppm go up to lets say 7ppm unless your literally using X1 vessel.
     
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