Ammonia contamination from Pentek GAC-20 filter
We recently purchased, from you, and installed a GAC-20 filter upstream from our laboratory RO pretreatment system. Immediately we started to find ammonia in the output. Troubleshooting the system led us back to the GAC filter.
We hoped the contamination would decrease with time, but that does not seem to be the case. We are finding levels in excess of 1 ppm.
This level may not be a concern for homeowners (especially if they do not know it is there), but as a water treatment plant laboratory that critically analyzes for ammonia hourly, it is.
Are you aware of this contamination?
Is it within your specifications, or is this unit defective?
If it is within your specifications, can you recommend a higher quality replacement? FYI this fitler (GAC-20) is a direct replacement of the previous unit.