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Polylok 12″ Round Distribution Box – Grated Cover


8 in stock

SKU: Poly/3017-12C/12"/RndSep Category:


The Polylok 12″ round distribution round/catch basin is the most versatile drainage box on the market today. You can choose what height you want your inlets and outlets to be. It also comes complete with the only seal of drainage boxes in the market that accepts 2”, 3”,4” and corrugated pipe. No more different fittings to inventory!


  • Use as Rain Drain, D-Box, or DropBox; allows for all configurations
  • Use as a rain drain for gutters, driveways & subsurface drainage
  • Use as a distribution box or dropbox for onsite septic systems
  • Use with the 12” riser to bring cover or grate to grade as needed
  • Accepts 2”, 3”, 4” and corrugated pipe
  • Four stabilizing feet with every box

Installation Instructions:

  1. Carefully cut out the required opening in the box with a knife.
  2. Install seal from INSIDE the box.
  3. Screw on the nut from OUTSIDE the box.
  4. Tighten to provide a watertight seal.
  5. Remove the correct size tear-out on the seal. TEAR OUT- DO NOT CUT OUT.
  6. Slide the pipe into the seal.
  7. Available with a solid cover
  8. Snap the stabilizing feet into the sockets at the base of the box. (12″ only)

Special Instructions for Installing 4″ Corrugated Pipe Only:

1. Remove the 4″ TEAR OUT on the seal. TEAR OUT DO NOT CUT OUT.
2. Carefully cut between raised ribs on the back of seal in all 4 places.
3. Push the corrugated pipe into the seal.

Additional information

Weight 5.15 lbs
Dimensions 14 × 14 × 16 in

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