Clean It Up

UK Window Cleaning Forum => Window Cleaning Forum => Topic started by: East coast window cleaning Services on February 27, 2010, 06:45:45 pm

Title: 4040 QUESTION
Post by: East coast window cleaning Services on February 27, 2010, 06:45:45 pm

changed my 4040 and done a resin change but tds is readin 019
anyone help

Title: Re: 4040 QUESTION
Post by: Slash on February 27, 2010, 06:48:00 pm

Is the riser tube in properly

Title: Re: 4040 QUESTION
Post by: Blue Frog Systems on February 27, 2010, 07:17:13 pm

Did you flush the membrane ?

Title: Re: 4040 QUESTION
Post by: Ian Lancaster on February 28, 2010, 07:41:26 pm

Check you incoming tds, the tds after RO and before DI

The RO should remove about 95% of dissolved solids.  If it's still 019 after DI then either your DI is too small and is depleting very quickly or there's something wrong with you RO - maybe the membrane isn't seated properly and waste water is finding its way past the membrane and into your DI.

My 40-40 reduces tds from 300 to 022 (not brilliant, but I can live with it) and my 6lt DI brings that down to 001 and the resin lasts about 3-4 weeks.