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Universal relief cone for protection of plastic inspection and rain chambers with an outer diameter of a shaft pipe (up to ) DN/OD 475 topped with manholes/telescopic inlets DN 425 with a flange diameter of the manhole body 500 mm. The construction of the cone provides both an additional cover for the connection of the telescopic pipe and the shaft of the well as well as stress compensation in the near-surface area. In plastic rainwater chambers DN 400 and DN 425, it supports the TVRT system adapters intended for street inlets: roadway, curb and roadway and self-leveling inlets with dimensions of 300x500, 500x500, 400x600. The set consisting of the T3/480/425/T relief cone and the adapter supporting the inlets from the TX/765 or TX/4052 product group ensures full relief, protection of the shaft of the plastic rainwater chamber from vertical and horizontal road loads and proper support of the inlet structure. The T3/480/425/T relief cone together with the T1/320/50 reducing ring can protect and relieve the shaft pipes of DN 400 manholes equipped with a 400/315 sleeve seal and topped with manholes/telescopic inlets 315 . For use in communication engineering in accordance with the above-mentioned purpose in the field of public roads without limits, internal roads,and railway engineering structures without limits. In the traffic areas of groups 1-4, in class D400 according to PN-EN 124-1: 2015-07.  


INDEXWEIGHT [kg]IN. DIA. Dn [mm]OUT. DIA. Dz [mm]HEIGHT H [mm]
INDEX: T3/480/425/TWEIGHT [kg]: 26IN. DIA. Dn [mm]: 425/480OUT. DIA. Dz [mm]: 580/680HEIGHT H [mm]: 185


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