Compact Designed Bain Circuit comprises co-axial modification of basic t-piece system which has been developed for facilitating scavenging of waste anesthetic gases. The Circuit travels inside outer reservoir tube to endotracheal tube connector as a tube carrying fresh gas. The Circuit comprises patient end mount, 22mm corrugated plastic hose X 1.6 metres long, short tubing nipple, 22 mm/ 22 mm male/female circuit adaptors X 2, distal end mount, long tubing nipple, PVC tubing x 3mtrs, 22mm heidbrink expiratory valve 15mm/ 22mm angle mount, breathing bag with mount, 23 mm male plug in mount, 23 mm/ 23 mm female/female circuit adaptor in a plastic bag finish. The Compact Designed Bain Circuit is low resistance to breathing and facilitates scavenging of waste gases.