Uponor Q4771313 Coupling, 1-1/4 in Nominal, ProPEX® End Style, Modified Polyphenylsulfone, Domestic

WIRQ4771313 MFG #: Q4771313
  • Country of Origin: US
  • Dimensions: 1-3/4 in W
  • Domestic/Import: Domestic
  • End Style: ProPEX®
  • Fitting/Connector Type: Coupling
  • Length: 3 in
  • Manufacturer Name: Uponor
  • Material: Modified Polyphenylsulfone
  • Nominal Size: 1-1/4 in
  • Pressure Rating: 150 psi
The ProPEX® Engineered Polymer (EP) Coupling is available for use in hot and cold domestic potable water distribution, residential fire safety and radiant heating and cooling systems. Each end of the coupling is manufactured with an Uponor ProPEX® fitting for connections to Uponor AquaPEX® or Wirsbo hePEX™ tubing.
  • Features and More


  • ASTM F877 specification for crosslinked polyethylene (PEX) plastic hot and cold-water distribution systems
  • ASTM F1960 specification for cold expansion fittings with PEX reinforcing rings for use with cross-linked polyethylene (PEX) tubing
  • ASTM E84 test method for surface burning characteristics of building materials
  • ASTM E814 test method for fire tests of penetration firestop systems
  • ASTM E119 test methods for fire tests of building construction and materials


  • PEX-A Plumbing System
  • Hydronic Radiant Heating and Cooling System
  • Snow Melting System
  • Turf Conditioning System
  • Permafrost Prevention System and AquaSAFE™ Fire Safety System


  • ASTM E84/E119/E814/F877/F1960
  • CAN/CSA B137.5
  • cNSFus-pw
  • cNSFus-rfh
  • cQAIus P321
  • HUD MR 1269
  • IBC
  • ICC-ES-PMG-1012
  • IMC
  • IPC
  • IRC
  • NSF 14/61
  • NPC of Canada
  • NSPC
  • ULC/ORD-C199P
  • UL 1821
  • UMC
  • UP Code
  • UPC Listed