The Di unit I got, already had a brown coloring to it. Is this normal with some brands. Was told it had only been used for a couple of days and was good as new. What colour should a new DI unit contents be or does it vary to different brands
its normall, depending on quality and brand.......
water purification is what we do , so unlike alot of charlatans around....we do alot of r&d to get to the levels we at with regard to water quality.
our resins are a mixture of a handfull of differant resins that act differantly in differant situations.....all being anion and cation based, we then add our own indicator to it aswell that guides you when it needs replenishing.
many companies out there will just buy a bag of de-ionising resin....and think they getting they same thing......or get overseas companies to pack sealed cartridges with any de-ionised resin.....
the results....well you know for yourself now
if membrane and resin are both good quality and flush valve are right spec etc then you should keep a 0 tds for a good 6 months and then only have to replace resin then
if resin is used and it stands......then they can grow amines and this will damage the resin aswell