Fire Suppression

Valves & Appliances


Expansion Ring Threaded Couplings

Expansion Ring Threaded Couplings

  • Lightweight threaded expansion ring couplings made from 6061-T6 aluminum alloy.
  • Hard coat anodized for added corrosion resistance and durability.
  • Parts laser engraved for easy identification.
  • Swivel sizes from 1 1/2” to 2 1/2” are attached using piston ring.
  • Swivel sizes 3” to 6” are attached using roller bearings.
CRS Couplings


  • LDH Storz delivery couplings come complete with locking head, 3-part collar and shank.
  • Coupling designed for use with 4” and 5” large diameter rubber hose.
S Couplings


  • Storz suction couplings supplied for use with hard rubber suction hose.
  • Coupling attached to hose using wire clamps (clamps not supplied by Northline).