Simple, effective and environmentally friendly|Designed specifically for takagi condensing T-H2-OS/DV tankless water heaters|Comes complete with fittings ready to install|Compact and visually pleasing design|Replace every 3 years or when the PH moves below 6|Unit can be disposed of with the household trash|3 gph flow, 40 to 100 deg F temperature rating, 125 psi pressure rating