A question of time
Saint-Gobain Pipelines’ Ensign cast iron drainage system is now set to take on the competition for ease of installation. The new Ensign EEZI-FIT push-fit range of fittings and couplings for above ground gravity drainage combines the benefits of cast-iron performance with the simplicity of push-fit assembly.
Mechanical jointing will remain the favoured option for applications where internal drainage systems may need to be altered or extended in the future, or if there is a higher level of pressure capability required in case of blockages, such as internal rainwater systems. Whereas push-fit offers the perfect solution and is generally used for installations such as high-rise residential blocks where the main soil stacks are not likely to be changed over time and the system performance is no more than 0.5bar gravity pressure.
However, because the EEZI-FIT range has been designed to the parameters of BS EN 877, both jointing methods can be used allowing ductile iron mechanical couplings to be used in certain sections of a push-fit system that may require dismantling at a later stage.