After DI Resin change - not pure 4ppm??

Hi guys.

Bit of advice needed.  Have just done my first resin change.  I have a two DI setup. Started to get a 10ppm reading so thought it was time i changed resin.  I moved my 2nd DI to the 1st from tap and changed the resin in the other one.  These are the readings I'm getting after swapping and replacing thde resin in one.  Tap - 202ppm, After 1st DI (resin not changed) 2 ppm, afer 2nd DI (new Resin) 4ppm.  Can anyone explain this?  What have i done wrong?

Thanks

Bart90 said:

Hi guys.
 
Bit of advice needed.  Have just done my first resin change.  I have a two DI setup. Started to get a 10ppm reading so thought it was time i changed resin.  I moved my 2nd DI to the 1st from tap and changed the resin in the other one.  These are the readings I'm getting after swapping and replacing thde resin in one.  Tap - 202ppm, After 1st DI (resin not changed) 2 ppm, afer 2nd DI (new Resin) 4ppm.  Can anyone explain this?  What have i done wrong?
 
Thanks

Click to expand...

Have you connected the new one the right way round. Flow in and flow out?


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Paul 007 said:

Have you connected the new one the right way round. Flow in and flow out?


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Click to expand...

I never checked when i reconnected it!  So could be that.  I will double check and come back if it's not that.  Just curious though; as the reading from the 1st DI is 2ppm, is there any need for the second?

Bart90 said:

I never checked when i reconnected it!  So could be that.  I will double check and come back if it's not that.  Just curious though; as the reading from the 1st DI is 2ppm, is there any need for the second?

Click to expand...

Yes. Follow the arrow directions on the top.

Twin DI will help it last longer whilst the old resin still has a bit of life in it rather than just chucking it away.

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Paul 007 said:

Yes. Follow the arrow directions on the top.

Twin DI will help it last longer whilst the old resin still has a bit of life in it rather than just chucking it away.

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Click to expand...

Cheers Paul, appreciated!

Little off topic here but you went with a double DI setup with a TDS of 202ppm..? I was told anything over 100ppm and you really should be using an RO system. Are you normally finding the double DI setup works fine? Just curious as I'm trying to decide what I'm gonna need.

Suhrly said:

Little off topic here but you went with a double DI setup with a TDS of 202ppm..? I was told anything over 100ppm and you really should be using an RO system. Are you normally finding the double DI setup works fine? Just curious as I'm trying to decide what I'm gonna need.

Click to expand...

It will be cheaper initially, in set up costs, to double DI but much more expensive in the long run. 

Part Timer said:

It will be cheaper initially, in set up costs, to double DI but much more expensive in the long run. 

Click to expand...

That's what I was thinking. Cheers Part Timer

also let it run for 5 mins to get the new water too come out ,  you need a r.o. as 200 is a resin eater to get down to 0  

Suhrly said:

Little off topic here but you went with a double DI setup with a TDS of 202ppm..? I was told anything over 100ppm and you really should be using an RO system. Are you normally finding the double DI setup works fine? Just curious as I'm trying to decide what I'm gonna need.

Click to expand...

I'm using for upstairs only so not requiring loads of water. Plus we live in flat so needed something that wouldn't take up much space but would get me started wfp and less time up ladders.  The resin in the two DI's (22 litre DI's so 14 litres of resin has lasted 3 months so far).  Although probably not the cheapest way of going about it, it has got me started and used to wfp and after lots of practice is starting to shave off job time which easily pays for the resin and leaves more money inn my pocket.  Long term, I will have to look at other options once i have a garage and a bit more room!  I would recommend it though to get started.

It's down to each and everyone personal preference.

I would advise an RO if you're over 100tds.

However just work out annual costs. Resin costs vs filter change costs average per year. If on a water metre and your annual waste cost. Usually 3 or 4 times your water usage.

Even if resin method does cost more it's still worth considering as it provides an easier and quicker method of filling. Small price to pay if this is important to you.

I am lucky having 60tds. I can fill tank at end of day in 20 mins and forget about it.

I also would not bother trad downstairs to save water. Too much faffing. Just wfp all the way. If you use a tap or aquadapter you will soon learn how to save water. As you get more experienced the faster you become reducing water usage.



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* or univalve (Not aquadapter)

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A useful tip is to colour code your double DI with insulating tape.

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Colour code DI connectors i mean.

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