Ammonia in RO/DI

[Beverly]

A few weeks ago, I checked the water coming out of our RO/DI unit for ammonia. It measured .5 ppm! So we changed all four membranes in the unit last week. This morning, checked ammonia again, and it's still .5 ppm!!

Could other folks in Edmonton check the water coming directly from their RO or RO/DI units for ammonia?

Am wondering why the membranes are not removing all the ammonia from our chloramine-treated tapwater. Chloramine in untreated Edmonton tapwater is about 1 ppm (tested it for someone on a recent thread who was having trouble with their tank).


Thanks