1. Larger Diameter Hymax® 14 – 24 Inches in Diameter
Hymax is a Registered Trademark of Krausz Industries Ltd.

2. Large Diameter Specifications
Meets or exceeds AWWA C219
Center Ring – ASTM A53 Grade A Steel
End Rings – ASTM A 795 Steel
Gaskets – NSF61 EPDM for water and sewerage
Nuts, Bolts, Washer, Bridge and other Misc. Hardware – Type 304 Stainless Steel
Nuts, Bolts and Washers include an anti-gall dry lube coating
Coating – 100% Fusion Bonded Epoxy for enhanced corrosion protection with average of 14 Mils thickness
Min Pipe Insertion Depth – 2.25 inches
Working Pressure inch – 260 psi, inch – 232 psi

3. Large Diameter Hymax Wide Range of Fit = Reduced Inventory Less Bolts = Fast Installation

4. Installation Instructions for 14” through 24” Large Diameter Hymax Couplings

5. Installation Instructions for 14” through 24” Large Diameter Hymax Couplings

6. Always unpack the coupling and inspect for shipping damage
Precautions
Please make the following notations when installing larger diameter Hymax Couplings
Always Verify Pipe Diameter with an O.D. Tape and Make sure it falls within the diameter range of the coupling
Always unpack the coupling and inspect for shipping damage
Prepare pipe ends and mark the stab depth according to directions
Back out Centering pins
Size Gasket According to Instructions
Never Lubricate Bolts (they are pre-lubricated)
Do lubricate ductile iron and asbestos pipe
Do not lubricate PVC, Steel or Polyethylene Pipe surfaces

7. The Purpose of Centering Pins
Prevention of Coupling Drift Over Pipe End When in Maximum Transition
Pressure Build Up Here Can Create Coupling Movement
Big End
Small End
Flow Direction

8. The Purpose of Centering Pins
If Coupling Moves Due to Pressure Differential, Centering Pin Bottoms Out on Pipe End Preventing Loss of Seal
Small End
Flow Direction
Big End

9. 14 to 24 Inch Hymax Installation Procedure Prepare Pipe Ends – De-scale and Clean, Mark Pipe Ends for a Maximum Stab Depth of 5” 5” 5”

10. Loosen Centering Pins (Anti Drift Pins)
1 - Pin in Set Position
2 – Pin Set for Installation
Loosening of Pin allows for full Retraction of Coupling over pipe end

11. 14 to 24 Inch Hymax Stab Pipe Ends to the Proper Insertion Depth
Remaining End Gap Between Pipe Ends is 2 – 3 Inches
Pipe Ends Stabbed into Couplings

12. Pins are One Inch Diameter – outside view
After Stabbing Pipe, Tighten the Centering Pins to seat the “O”Ring Seal on the back side of the Pin
Pins are One Inch Diameter – outside view

13. Seated Anti-Drift Pin – Inside View

14. Tighten All Bolts on Compression Ring to the required torque to properly seat the Gasket
Two Bolts per End
Torque Requirement is 150 ft. lbs.
Required Wrench – 17 to 21 inch long wrench handle and 15/16” (24 mm) pass through socket
Cross Tighten evenly
Always check for leaks prior to burial
If leakage occurs, re-torque nuts and bolts as required.