Filtration unit with Flask assembly consist of 500 ml funnel, filter head, 2000 ml receiving flask, clamp of anodized aluminum, stainless steel lid, rubber tube (0.8 mm), and a tube connector. This solvent filtration unit offers excellent fitting with vacuum pump. The whole assembly can be autoclaved at high temperature and pressure (121°C, 20-30 minutes) or it can be sterilized with epoxy ethane etc.