How to install piping for a central vac system Friday, March 4, 2011; 11:34 AM Installing the piping for a central vac system in an average-size new house usually takes part of a day. The pipe glues together with regular PVC cement. You can cut the thin piping with a simple hacksaw, making sure you remove any burrs from the cut ends of the pipe. Burrs can grab onto hair and possibly lead to a clog years from now. You also have to run low-voltage wire from the outlets back to the motor. This is very easy to do. Just use electrician's tape to adhere this small wire to the side of the plastic vacuum piping. Be sure to check your canister frequently to ensure that it's not full of dirt and debris. As the canister or bag fills with dirt, the suction power of the vacuum starts to drop. Use common sense and avoid picking up rocks or gravel with your central vac. Sweep that up with a regular broom.