Mini Inspection Chambers (300mm) - Product Review (Video)

Choosing the right 300mm inspection chamber is crucial for effective drainage installation. Here’s a quick review of our top options:

D300MH3 – Internal Use with Recessed Cover

• Includes: Chamber base, 2 risers (300mm x 200mm), recessed cover

• Side inlets: 2 x 110mm (45° to main channel, 100mm above base)

• Depth: 760mm (adjustable)

• Cover: 220-300mm clear opening, 440mm x 440mm overall, 5T load

• Best for: Internal screed/concrete infill installations

D300MH1 – Driveway Use with Polypropylene Cover

• Includes: Chamber base, 2 risers (300mm x 200mm), square polypropylene cover

• Side inlets: 2 x 110mm (45° to main channel, 100mm above base)

• Depth: 695mm (740mm with cover, adjustable)

• Cover: 220-300mm clear opening, 438mm x 438mm overall, 3.5KN load

• Best for: Domestic driveways

DMH3005 – Double-Sealed for Internal & External Use

• Includes: Chamber base, 2 risers (300mm x 200mm), square double-sealed cover

• Side inlets: 2 x 110mm (45° to main channel, 100mm above base)

• Depth: 720mm (adjustable)

• Cover: 300mm clear opening, 346mm x 346mm overall, 3.5KN load

• Best for: Internal and external applications

D300MH5 – Level Invert for Shallow Drains

• Includes: 320mm level invert chamber base, 2 risers (320mm x 190mm), square cover

• Side inlets: At same invert level as the main channel

• Depth: 605mm (625mm with cover, adjustable)

• Cover: 303mm clear opening, 380mm x 380mm overall, 1.5KN load

• Best for: Connecting new pipes to existing shallow drains

M300MH4 – Compact Level Invert Chamber

• Includes: 250mm level invert chamber base & riser section, circular cover

• Side inlets: 2 x 110mm (45° to main channel, at same level as base)

• Depth: 570mm (612mm with cover, adjustable)

• Cover: 250mm diameter, A15 1.5T load

• Best for: Very shallow installations