APS Casing Spacers center water and sewer pipes in casings with ease of installation, are virtually corrosion proof and provide insulating protection from a possible electrical shorting between the carrier pipe and casing. No special tools are needed, no grease is used, and they are easily bolted on by a single worker. APS Casing Spacers eliminate the need to fill the casing annulus with sand which is extremely labor intensive. Sand in the annulus also acts as an electrolyte thereby introducing unwanted current to the steel or ductile iron. Eliminating the annular fill allows for easy removal to repair or replace damaged pipes. With no need for this fill, APS Casing Spacers are your answer to lower installation costs with continued access for maintenance.