Certa-Lok C905/RJ PVC pipe is a non-metallic, mechanically-restrained joint system designed for use in potable and reclaimed water, fire protection and force main sewer systems. The pipe is made in cast-iron outside diameters and meets all performance requirements of AWWA C905. Certa-Lok pipe provides a restrained joint by utilizing precision-machined grooves on the pipe and in the coupling/integral bell which, when aligned, allow a spline to be inserted, resulting in a fully circumferential restrained joint that locks the pipes together. Certa-Lok joints can be easily disassembled, allowing for system changes, extension, movement or reuse of the entire system.