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The base section of the manhole construction is normally sealed using a welded uPVC base plate. This can then be encased with a concrete filling to ensure system balance and to counter any upthrusts encountered on site. At the same time, the concrete filling can also be shaped to easily match the individual pipe configurations and benching required at that location.
In and out flow pipes can be installed anywhere around the circumference of the base unit dependent upon pipe and site configuration. These inlet and outlet pipe sections are then connected to the external lines using solvent cement, rubber ring or flanges depending upon the local system connection requirements.
When the exact inlet and outlet pipe dimensions and configurations are specified beforehand, Cosmoplast can supply both manhole chambers and readymade inlet and outlet connections which exactly match onsite requirements. |