Continuous reflux apparatus keeps solvents pure and free of oxygen. Compact, upright design allows multiple units to be assembled in small areas. Distillation column is 250mm long, vacuum jacketed, unsilvered. Allihn condenser is 250mm. Adapter at top has two hose connections for maintaining inert atmosphere. Stopcocks are 2mm bore PTFE. Joint on lower drain arm is 14/20, all others 24/40. Complete unit consists of adapter, condenser, storage head, column, flask and mantle. Septum are optional.