Newman stopcock facilitates reflux ratio adjustment and reduces hold-up on walls; product drops directly into receiver. Stopcocks are arranged for convenient manipulation and are placed so that the head may be used in either right or left-hand setup. The condenser drip is adjustable for directing reflux into takeoff. Condenser hose connections point to rear. Condenser length is 100 mm. Thermometer joint 10/30, all others are 14/20.