The Poly-Flo co-extruded double containment piping system from Asahi/America is available in black PE for above- and belowground applications and euro gray PP-R for higher temperatures. Sizes include 1 by 1 1/2 inches, 2 by 3 inches, and 4 by 6 inches. The system is designed to operate at up to 150 psi at 68 degrees F and is suited for installations with space constraints, and where thermal expansion and contraction are present. 800/343-3618; www.asahi-america.com.