The Noritz EVRF031 Condensate Container Set is a genuine OEM replacement component designed to collect and manage condensate generated by compatible Noritz high-efficiency tankless water heaters. It works by receiving acidic condensate produced during combustion and directing it safely toward the appropriate drainage system. This component is used with select Noritz condensing tankles... https://www.partshnc.com/noritz-evrf031-condensate-container-set