These carboy cap assemblies feature tubing ports with fittings to ensure a leak-tight connection and an activated carbon exhaust filter to remove solvent fumes from escaping air. Ideally suited for HPLC waste collection, the cap is constructed of polypropylene and includes a replaceable sulfur-cured EPDM gasket. Tubing fittings are made of acetal and ETFE for compatibility with HPLC-grade solvents. Caps fit standard carboys and jerricans with 83-mm diameter neck.