HDSS® restrained joint pipe provides a true 350psi working pressure with a flexible restrained push-on joint for 4″–54″ ductile iron pipe. HDSS Fittings are available in 24″ through 54″. The HDSS was specifically engineered to offer advantages over the discontinued TR FLEX® restrained joint pipe. HDSS delivers superior overall performance; its working pressure ratings match the class of pipe it is used with, while offering greater deflection and easier installation. For example, 36″ through 54″ HDSS provide 2.0° deflection, 30″ provides 2.5°, 16″ through 24″ provide up to 4.0°, and 4″ through 12″ provide up to 5°, allowing for alignment and settlement issues in buried applications. The simple, robust design, combined with unmatched strength and flexibility, makes HDSS the strongest and most versatile restrained joint on the market—ideal for bridge piping, horizontal directional drilling (HDD), and pipe bursting applications.

To facilitate quick, easy and trouble free installation, ductile Iron locking segments are inserted through a single slot in the bell face and slid into position around the bell to provide a positive axial lock between the bell interior surface and a retainer weldment on the spigot end of the pipe. A rubber retainer installed between the locking segments completes the installation and ensures the segments stay in place while the joint is extended to engage the restraint. The HDSS joint can be easily disassembled by reversing the installation procedure with no need of special tools or shims.

HDSS Pipe utilizes the conventional TYTON JOINT® Gasket for reliable sealing. HDSS spigot ends are compatible with 4″–36″ TR FLEX® Pipe and Fittings. When 30″-36″ TR Flex Fittings are used the fitting joint rating will be 250 psi or less depending on the class of pipe used. 4″ through 24″ TR FLEX fittings have a 350 psi joint rating depending on the class of pipe used.

HDSS Pipe is Made in the USA.