Quote from: The Shiner on January 18, 2008, 06:10:07 pmQuote from: Matt99 on January 18, 2008, 06:00:21 pmmy TDS is around 350 fron the tap and 20ish after merlinWhat I would do is test the TDS after the RO. If it's higher than the TDS of the water coming out of DI1, don't change anything as the resin in DI1 is still doing something. I don't change DI1 until TDS after RO = TDS out of DI1. However, these tests should not be made shortly after the water flow restarts. Wait till it's been going a while because some ROs produce a higher TDS for a few minutes when they've been standing a while.Throwing away the resin from DI1 if it's still doing something is wasteful IMO. Bear in mind that once the water out of DI1 starts producing a reading >000, it won't be too much longer before it needs changing anyway. Having a DI2 just saves me from having to change things around immediately if I'm too busy or can't be bothered.\nice one Shiner this makes sense Its funny because i was gonna ring you to ask this question but i lost your number
Quote from: Matt99 on January 18, 2008, 06:00:21 pmmy TDS is around 350 fron the tap and 20ish after merlinWhat I would do is test the TDS after the RO. If it's higher than the TDS of the water coming out of DI1, don't change anything as the resin in DI1 is still doing something. I don't change DI1 until TDS after RO = TDS out of DI1. However, these tests should not be made shortly after the water flow restarts. Wait till it's been going a while because some ROs produce a higher TDS for a few minutes when they've been standing a while.Throwing away the resin from DI1 if it's still doing something is wasteful IMO. Bear in mind that once the water out of DI1 starts producing a reading >000, it won't be too much longer before it needs changing anyway. Having a DI2 just saves me from having to change things around immediately if I'm too busy or can't be bothered.
my TDS is around 350 fron the tap and 20ish after merlin