Polytubes Perforated Corrugated High Density Polyethylene Tubing with Sock Filter For Subdrainage Applications. The Sock filter is a seamless, knitted polyester filter that is used to prevent blockage of the pipe in sandy or silty soils. In fine sandy and silty soils, unprotected drainage tubing is apt to be blocked by a build-up of soil particles in the drains leading to failure of art or all of the system. Whenever subsurface drainage tubing is installed in soils featuring small particle sizes, filtered tubing should be used.
Features
Easy to Install: Lightweight and easy to carry. Saves time and labor. No special tools or fittings required, just cut to the required length.
Flexible: Shifts with the ground. No problems due to misalignment and clogging, because the tubing is so flexible. Big 'O' aligns itself which allows the system to continue to work efficiently
Strong-Tough-Durable: Won't crack or break under normal handling and installation procedures. Tough enough to withstand the heaviest loads.