Hold the sewer pipe gently to the wood floor with one hand. Place the plastic PVC hanger over the sewer pipe and let the flat ends of the hanger rest against the floor.
Set a wood screw in the screw hole of the hanger. Secure the screw inside the predrilled screw hole in the center of the flat end of the hanger with a power drill.
Repeat step 2 on the opposite flat end of the hanger. Mount the sewer pipe to the floor by installing a PVC hanger every 3 to 4 feet along the length of the sewer pipe.