When encasing CANTEX PVC pipe in cement, CANTEX Base and Intermediate Spacers must be used. This video explains the installation process for CANTEX's patented Base and Intermediate Spacer system, the only interlocking, self-supporting spacer system designed to insure that the weight of the concrete is evenly distributed and not transferred to the bottom row of pipe during the cement pour---protecting pipe from distortion. Learn more about CANTEX Base and Intermediate Spacers at www.cantexinc.com