Traditionally, end seals were made of brick. But as plastic and rubber technology has evolved, the preferred material for end seals has been EPDM rubber that expands and contracts to ambient temperatures and doesn’t crack and fail as brick is apt to do. Casings are used for underground placement of carrier pipe beneath highways and other roads, railroads, and through commercial and residential areas. End seals have the all-important task of keeping the casing pipe dry and protecting it from corrosion.
When you need to install water and sewer carrier pipes in casing, Pittsburgh Pipe offers a number of casing spacer solutions made from popular materials such as stainless steel, galvanized steel, epoxy coated steel, and polyethylene. Casing insulators are used to support and insulate the carrier pipes within the casing. They also eliminate the need to fill the annulus within the casing with sand to insulate the inner pipe. By eliminating the inner fill, the casing and inner pipe can be repaired easily or removed later, lowering installation and maintenance costs. These spacers are corrosion resistant and require no special tools or grease for installation; they are simply bolted on and secured to the casing.