The Brett Martin 280mm Dia. 90° Chamber Base (205mm Invert) is a compact inspection chamber base designed for shallow underground drainage installations. Featuring a 90° channel and 205mm invert, it supports efficient flow direction changes while providing access for maintenance.
The Brett Martin 450mm Dia. Chamber Base (225mm Invert) with 3 Socket Plugs – 160mm is a robust inspection chamber base designed for 160mm drainage systems. With a 450mm chamber diameter and included socket plugs, it supports flexible configuration and practical access for maintenance.