The HYMAX 2 Large Diameter (HLD 2) is the next generation of wide-range couplings. HLD 2 feature a complete line of products in sizes 14”-60” with only 4 top-facing bolts and flip-gasket for faster, safer and more efficient installations.


The HYMAX 2 Flip Gasket offers a new level of innovation that makes installers’ jobs easier and safer:
HYMAX 2 Large Diameter’s patented flip gasket can be easily flipped in or out to accommodate different pipe ODs between 14 to 60 inches (14″-24″ standard and 26″-60″ MTO).

Thanks to the “no-tear” flip gasket advanced technology, gasket removal mistakes are eliminated, making the installer’s work more efficient, saving time and money.

The HYMAX 2 Large Diameter has all the features of the original HYMAX Large Diameter with its four top-facing bolts, wide range and dynamic deflection.

 Easier, faster and safer installation – the coupling’s four top-facing bolts, compared to up to 25 bolts on some similar sized couplings, eliminate the need for extensive under-pipe digging, minimizing installer time in the ditch and increasing worker’s safety.

Save money on constant pipe repairs – dynamic pipe deflection of up to 4° on each end reduces the risk of future pipe damage.

Save money on reduced inventory – with a wide working range of 2.1″, the HYMAX 2 Large Diameter has an extraordinary capacity to be stab-fitted to a wide variety of piping materials and diameters.
Used for pipe section replacements, HYMAX 2 HLD is the latest chapter in HYMAX’s history of game-changing technologies that answer field needs.

After 20 years and millions of installations in the U.S., installers have come to trust HYMAX for its reliability and ease of installation.

NEW from Krausz USA:

  • HYMAX products sizes 14″ to 24″ in all configurations are now available with NBR gaskets in addition to EPDM.
  • HYMAX MTO products (Made to Order) can now be ordered with NBR gaskets in sizes 26″ to 60″

For HYMAX product installation instructions and individual specification sheets, please follow the product pages.

See Case Study  – How HYMAX HLD accommodates oval pipe – in East Greenbush, NY.

To order a Lunch N’ Learn free educational session at your location click here.


See Installation Video
See Product Video
To order a Lunch N’ Learn free educational session at your location click here.
pdf HYMAX2 -HLD 2 14”-24”
pdf HLD2 - Large Diameter Coupling
pdf HLD2 - Coupling Large Diameter Long Body
pdf HLD2 - Large Diameter Flange Adaptor & Long Body Flange Adaptor
pdf HLD2 - Reducer Large Diameter