Optipure 160-50115 FXI-22 Dual 20" System 1-1/4" MPT The only difference is the

The only difference is the outer casing

Approved for behind-the-wall applications and can be used for permanent installations

which provides it with longer and more linear scales

the system seamlessly allows cleaner rainwater to flow through to your collection point

Ultra-smooth contact surfaces prevent bacterial adhesion and build-up

Optipure 160-50115 FXI-22 Dual 20" System 1-1/4" MPT The only difference is theThis Optipure 160 50115 FXI 22 Dual 20" System is a dual housing water treatment system with drop in 20 cartridges that reduces sediment down to 0. 5 microns and reduces chlorine, taste & odor at a flow rate of 3. 0 gpm for 30,000 gallons. The system includes IsoNet, OptiPures patented scale inhibiting technology, which delivers consistent protection against the precipitation and accumulation of scale and provides a protective barrier to help guard