Maintain the performance of your still with Thermo Scientific™ Barnstead™ Classic Stills Replacement Consumables, including UV lamp and Thermo Scientific™ Ventgard™ filter element (the consumable portion of the Ventgard filter assembly). Prevent air from entering the reservoir via the condenser atmospheric vent and protect stored water against airborne particulates, organics and CO2 with the Ventgard air filter.