Photo 1 of 4 Inch (NPS 4") Flexible Grooved Coupling - Ductile Iron, UL/FM Certified for 4.5" OD Fire Sprinkler Pipes (Wet/Dry Systems), Moderate Pressure 2.5Mpa/360 PSI (DN100(NPS 4"))

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Photo 1 of 4 Inch (NPS 4") Flexible Grooved Coupling - Ductile Iron, UL/FM Certified for 4.5" OD Fire Sprinkler Pipes (Wet/Dry Systems), Moderate Pressure 2.5Mpa/360 PSI (DN100(NPS 4"))Photo 2 of 4 Inch (NPS 4") Flexible Grooved Coupling - Ductile Iron, UL/FM Certified for 4.5" OD Fire Sprinkler Pipes (Wet/Dry Systems), Moderate Pressure 2.5Mpa/360 PSI (DN100(NPS 4"))