INSTALLATION PROCEDURES
The design and placement of inlet and outlet pipes or connectors shall be coordinated in line with the total structure and design of the drainage system network.
•	uPVC manholes need to be mounted on a precast concrete base slab which may or may not have an inset circle of diameter slightly larger than that of the manhole. The inset circle helps to ensure the exact placement of the unit.
•	The base slab should be placed plumb and level in order to ensure that the uPVC manhole placed within the slab is level.
•	Small holes may then be cut on the manhole through opposite sides of the base unit in horizontal direction to enable the reinforcing bars to be incorporated through the walls of the unit. This ensures the connection and locking into the precast concrete base.
•	Manhole may come with or without benching to allow end user flexibility in terms of their requirement of benching structure or material.
•	Manhole installation is completed by the use of a pre-cast concrete top slab with inset circle formed into the bottom face of the slab. This inset circle is made slightly larger than the manhole diameter to allow it to fit snugly over and lock into the top of the manhole structure.
•	According to the requirement for entry and access, the pre-cast concrete top slab could incorporate the normal covers and frames.
•	Connection/rocker pipes may then be used to connect the manhole to the surrounding pipe networks.