The filters are 4 months old & still producing 0 TDS. It is a 4 stage unit with auto shutoff,Pressure Gauge & Single TDS Meter. The filters are sediment/carbon/Spectrapure Silicabuster DI. Comes with all tubing. $175
LOL, My bad. Yes i meant gpd. I bought the lower gpd membrane because it has a higher rejection rate than its bigger brothers. Thanks for the correction.