different in diameter the coupling of the invention is manufactured to accommodate such difference and is susceptible to no such pinching the angle of bevel as illustrated in fig1 is advantageously 45 u00b0 but may be any other angle sufficient to prevent the above described pinching presently hubless cast iron soil pipe is used in size ranges of 11 2 34 15 34 in diameter and is produced in lengths of five feet and ten feet fittings are produced in an assortment of over 600 different patterns with fig1 illustrating a fitting 60 which is normally referred to as a 34 reducing 1 4 bend 34 having the required spigot beads 62 housing 40 would also be manufactured in sizes to accommodate these various nominal pipe diameters in the past efforts have been undertaken to develop a coupling for hubless pipes which holds or resists higher internal pressures generally by employing one type of mechanical clamping pressure around the pipe ends to provide the sealing pressure and the clamping force the instant invention is an improvement over prior art pipe couplings of this type and due to its adaptability to existing pipe couplings involves little added expense and provides adaptability to existing installations the two major requirements for sealing and coupling the hubless pipes when exposed to high internal pressures are that the sealing pressure is still.