Purpose: Used when a 450 mm diameter chamber has to be installed so that the top is below ground level. The riser can be cut to length and fits into the top of the chamber rising to ground level to terminate with a cover and frame.
Fitting Tips: Depths of less than 1.2 metres can be achieved by cutting the riser between the ribbed sections. The riser is connected to a separate chamber base with a push fit joint, fitted with a ring seal. If another riser section is used, it can be joined to the one below using the same method.
Available in Colours: Black
Range of uses: These can be used as an alternative to traditional manholes up to depths of 1.2 metres.
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