HM Digital (PM-2) External In-Line TDS Purity Monitor 1-4" Quick Connect Phosphate1343 This cross-brand compatibility makes it

This cross-brand compatibility makes it a reliable replacement seal for most standard 10-inch and 20-inch Big Blue housings

use Watts F109009 as a direct substitute

What Makes This Filter Work

Balanced flow for whole-house or RO pre-filtration

HM Digital (PM-2) External In-Line TDS Purity Monitor 1-4" Quick Connect Phosphate1343 This cross-brand compatibility makes itHM Digital Water Quality Meters HM Digital PM 2 External In Line TDS Purity Monitor Continuous monitoring with programmable alerts for any water purification system using 1 4" quick connect fittings 0 200 ppm Range Audible & Visual Alerts User Defined Set Points Factory Calibrated The HM Digital PM 2 monitors total dissolved solids in real time and alerts you when your RO membrane or DI resin needs replacement. With a 0 200 ppm measurement range and