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1" (25.4 mm) CPVC Slip x FNPT Threaded Adapter

1" (25.4 mm) CPVC Slip x FNPT Threaded Adapter joins CPVC pipe and threaded NPT pipe 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 and a threaded brass insert. Made in the USA!
SKUNominal DiameterDesignMaterial
TCPVCAT3 1" (25.4 mm) Slip x FNPT Threaded Adapter Chlorinated Polyvinyl Chloride (CPVC) with Brass FNPT Insert
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) CPFA-1
Usually Ships Within 48 Hours

Product Description

1" (25.4 mm) CPVC Slip x FNPT Threaded Adapter is a CPVC fitting designed to join CPVC pipe to metal pipe with National Pipe Thread (NPT). This adapter features a CPVC socket designed to slip over 1" (25.4 mm) CPVC pipe, facilitating a straight connection to 1" (25.4 mm) male NPT-threaded pipe.

Each 1" (25.4 mm) CPVC Slip x FNPT Threaded Adapter is made in the USA by Thermafit Industries, Inc., a California-based manufacturer of plumbing and fire sprinkler pipe fittings. This adapter has a working pressure rating of 175 PSI at 150F (65C) and consists of chlorinated polyvinyl chloride (CPVC), favored by many fire sprinkler installers for its ease of installation, excellent flow characteristics, and low cost.

1" (25.4 mm) CPVC Slip x FNPT Threaded Adapter 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" (25.4 mm) CPVC Slip x FNPT Threaded Adapter 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 Adapter Dimensions

  • A: 1.9"
  • B: 1.894"
  • C: 1.094" (Schedule 40) or 1.375" (Schedule 80)
  • H: 0.5000"
  • L: 1.7500"
  • M: 2.0000"

Technical Documents

Click here to view the manual for this 1" (25.4 mm) CPVC Slip x FNPT Threaded Adapter.

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