American AVK Company

Expect Quality Products

[ Hymax x Hymax ]

[ Hymax x FL ]


There are many situations that require valves and hydrants with additional restraining power. AVK valves and hydrants joined with HYMAX GRIP® restraint products combine the patented technology of the HYMAX GRIP® coupling with AVK's top of the line gate valves and fire hydrants. Designed using HYMAX’s innovation and patented technology, our flow control solutions work with ductile iron, PVC and HDPE pipes and are suitable for a wide variety of applications.


  • Fast and easy one-bolt connection works for all pipe types, is flexible and self-retrained
  • HYMAX GRIP® meets or exceeds all specifications of AWWA Standard C219, NSF-61 and NSF-372
  • End rings: 2” - 3”: Steel Casting ASTM A216 WCB.- 4” - 12”: Ductile Iron Casting ASTM A536 grade 60-40-18
  • Bolts, Nuts and Washers: ASIS 304 Stainless Steel impregnated with zinc via the MAG process
  • Gasket: EPDM and NBR available, both are compounded for water and sewage. Certified to NSF-61 and NSF-372 standards for contact with drinking water
  • Gasket bridge: AISI 304 Stainless Steel
  • Spherical spacers: AISI 304L Stainless Steel
  • Coating: Fusion bonded epoxy for enhanced corrosion protection NSF-61 and NSF-372. - Average thickness 14 mil
  • Working temperature: EPDM: -20°F UP TO +125°F, NBR: -4°F UP TO +125°F
  • Minimum pipe insertion of 3.6“
  • Dynamic deflection up to 4° per side