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1 1/4" (31.75 mm) CPVC Slip x Slip Coupling

1 1/4" CPVC Slip x Slip Coupling connects CPVC pipes used in NFPA 13, NFPA 13D, and NFPA 13R fire sprinkler systems. This UL-listed and FM-approved fitting is made with heat-resistant thermoplastic CPVC. Made in the USA!
SKUNominal DiameterDesignMaterial
TCPVCSC4 1 1/4" (31.75 mm) Slip x Slip Coupling Chlorinated Polyvinyl Chloride (CPVC)
Working PressureTemperature RangeListingsThermafit Industries Part Number
175 PSI at 150F (65C) 35F to 150F (2C to 65C) UL-Listed and FM-Approved. UL listed for Light Hazard Occupancies (NFPA 13) and Residential & Home Fire Sprinkler Systems (NFPA 13D, NFPA 13R) CPCUP-114
Usually Ships Within 48 Hours

Product Description

1 1/4" CPVC Slip x Slip Coupling is a corrosion and heat-resistant CPVC fitting designed for use with fire sprinkler piping. This CPVC coupling features two 1 1/4" (31.75 mm) female socket connections used to join two pipe ends.

Each 1 1/4" CPVC Slip x Slip Coupling is made in the USA by Thermafit Industries, Inc., a California-based manufacturer of plumbing and fire sprinkler pipe fittings. This coupling has a working pressure rating of 175 PSI at 150F (65C) and is suitable for installation in NFPA 13, NFPA 13D, and NFPA 13R systems where allowed by state and local law.

1 1/4" CPVC Slip x Slip Coupling is intended for use in light hazard NFPA 13 occupancies, residential NFPA 13R occupancies, and home fire sprinkler systems in accordance with NFPA 13D. This FM-approved product is UL-listed for use in wet-pipe automatic fire sprinkler systems in combination with UL-listed CPVC products.

1 1/4" CPVC Slip x Slip Coupling is backed by Thermafit's ten-year warranty from the date of shipment. To find Thermafit-approved CPVC glue, click here. Consult Thermafit's installation manual for minimum curing times, a full list of compatible adhesives, and friction loss allowances. Not suitable for outdoor installation.


CPVC Coupling Dimensions

  • A: 1.670"
  • B: 1.655"
  • C: 0.938" (Schedule 40) or 1.250" (Schedule 80)
  • L: 2.5625"
  • M: 2"
  • N: 0.1569"

Technical Documents

Click here to view the manual for this 1 1/4" CPVC Slip x Slip Coupling.

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