This document describes the Polylok Basin Installation. It includes instructions and recommended backfill material with illustrations.

The Polylok Basin instructions guide you to inspect all materials supplied by ADS/Polylok to assure there are no damages due to shipping or shortages prior to installation. Excavate a hole for the basin large enough to accommodate the basin, underground piping, backfill material and adequate working space. Prepare the bottom of the excavated hole with 6 inches of backfill material or concrete pad. Check hole base to make sure it’s level and smooth. Install the basin on a gravel base or concrete pad, anchor if necessary. Concrete may be poured around the basin bottom if ballast is required to accommodate a buoyancy condition. Backfill with pea gravel 4 - 6” (100 - 150 mm) around the entire periphery of basin. Compact backfill material in 12” (300 mm) lifts, stopping to install piping as required.

The recommended backfill material is listed with caution for deep burial depth and a note about reinforcement if necessary.