TYPE OF JOINTS Spigot & Socket Joint Also commonly called the Rubber Ring Joint (RRJ). RRJ provides water tightness and protection from the environment, and flexibility in concrete pipelines. A certain degree of linear deflection can be accomodated with this type of joint. Rebated Joint An internal rebated joint is used for pipes of diameters 750mm and above while external rebated joints are used for pipes of diameters 600mm and below. This is a rigid joint and deflection due to soil settlement occuring after installation may cause cracks in the joint, thus permitting leakage. These joints are not recommended where water tightness is critical.     DRAINAGES |Page 1 | Page 2 | Page 3 | Page 4 | Page 5 | Page 6 | Page 7 | Page 8 | Page 9 | Page 10 | Page 11 | Page 12 | Page 13 | Page 14   Top HUME CONCRETE MARKETING SDN BHD (8411-T) Level 2, Bangunan Pan Global, No. 1A, Jalan Tandang, P.O.Box 21, 46700 Petaling Jaya, Selangor. Hot-line: (603) 7785 5282 Tel: (603) 7783 3068 Fax: (603) 7785 1823 E-mail: Adam Hussein (HIMB-PJ)