You are using an outdated browser version not supported by this website.
Click here to upgrade your browser

Round Drainage Pit

Allproof’s round drainage pit is the ideal solution for exterior surface stormwater catchment. This economic and durable pit sump is moulded from 100% recycled plastic. The pit has a cast iron lid that has been designed to resist heels getting caught in the grate (heel-proof). With a 35% open area and 700mm depth it has excellent hydraulic performance and capacity. The round design avoids aligning with pavers, walls or street furniture making install a lot easier.

This robust drainage pit has the option of adding a pit riser, the riser can add up to an extra 200mm depth and be easily cut to the desired height. The riser improves the drainage pits total capacity and installation as the pits can be hunched into place easily and risers adjusted to suit the finished surface later.

Key Features
  • Manufactured from durable plastic
  • Round cast iron grate
  • 350x200mm riser provides total 875mm depth & 60L capacity
  • Pre-cut holes for storm water connection when seal included
  • DP350X700RS2 includes half syphon with removable access cap
  • 300mm sediment catchment
  • 100mm Drainage pit seal
  • Compliant with E1/AS1 clause 3.6
NZ-Owned Business
NZ-Owned Business
Recycled Content (Pre-Consumer)
Pre-Consumer Recycled Content
Scope of Use
  • Ideal for exterior surface stormwater catchment
  • Heel-proof grate for pedestrian access
  • Optional pit riser addition — can add up to an extra 200mm depth
Limitations on Use
  • 350x200mm riser provides total 875mm depth & 60L capacity
  • 300mm sediment catchment
  • 100mm Drainage pit seal
Statement of Building Code Compliance
  • Compliant with E1/AS1 clause 3.6
Other Performance Attributes
  • Moulded from 100% recycled plastic
Product Warranty



A New Zealand owned company specialising in the manufacture of plumbing and drainage products and systems.

Product Enquiries

News from Allproof Industries

Managing Leak Control to Achieve a Compliant Tiled Wetroom System
Allproof Innovates their Perimeter Drain with New Grate and Clip System NEW
Achieving MoE Design Standards for Level Threshold

Posts by Andrew Smith

See All

Posts by Justin Barber

See All

Get a free weekly digest of essential news

New and updated architectural products, design solutions, inspiration, technical advice and more when you sign up for EBOSS.