The Underground uPVC Inspection Chamber Base 5-Inlet is a versatile and heavy-duty foundation component designed for managing complex below-ground drainage and sewerage networks. Manufactured from tough, high-impact unplasticized polyvinyl chloride, this chamber base is engineered to withstand substantial external soil pressures, ground settlement, and the corrosive conditions of subterranean environments. It serves as a central hub where multiple pipe runs converge, providing essential access points for inspection, maintenance, and clearing blockages.
 
Featuring five pre-formed inlets, this chamber base offers exceptional flexibility in routing drainage systems, allowing multiple incoming lines to connect into a single, streamlined outflow. The inlets and main channel are designed with smooth internal sweeps and optimal gradients to promote efficient hydraulic flow, preventing turbulence and minimizing the risk of sediment accumulation or blockages. The durable construction ensures a reliable, root-resistant, and watertight setup when paired with compatible 110mm drainage pipes and appropriate seals.
 
Designed to accept standard inspection chamber risers and covers, the unit allows installers to easily adjust the depth to match finished ground levels. Whether you are managing a complex residential layout or a commercial drainage network, this 5-inlet inspection chamber base delivers professional-grade durability, simplifies system maintenance, and ensures long-term operational reliability underground.
 
Base for use with 450mm Universal Inspection Chamber shaft 
110mm straight channel with four 110mm (2 x 45 diameter and 2 x 90 diameter) left/right hand branch entries
for use with 110mm components
Supplied complete with 3 profiled, blank-off plugs for use in unused side entries
Universal IC can be use to a max 1.2m invert depth (adoptable and non-adoptable)