The Takagi TH-NT01 neutralizer assembly is an in-line cartridge containing a blend of medias designed to neutralize the acidic condensation discharge from the new high efficiency condensing tankless water heaters. APCOM Condensate Neutralizer Kit, 3/8 in FPT Inlet and Outlet, For Use With: Model T-H2_DV and T-H2-OS Takagi Neutralizer Kit, 2-1/2 in Dia x 12 in L