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Compression Fittings and Unions

Choose from a variety of compression fittings to create a leak-resistant connection, a "T" intersection, or transition from unthreaded to threaded pipe. Unions provide a corrosion-free connection and reduce pull-out from pipes.

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The NDS 1 in. IPS UC Compression Coupling forms a corrosion-free connection between two pipes to direct flow one-way through the system (NDS CPC-1000)
Where to Buy
The NDS 1 in. IPS UC Compression Coupling showing the gasket inside the adjustable nut that secures it in place once installed (NDS CPC-1000)

Key Features

  • Compression fittings and unions provide a leak-resistant connection between two pipes
  • NDS offers a wide range of sizes in compression couplings, adapters, tees, unions, and union adapters
  • Compression fittings have an adjustable nut on each end to tighten and secure it in place
  • Unions are used to connect pipes and provide a quick way to separate pipes when needed; no glue required
  • Product is NSF/ANSI 61 + 372 listed

Applications

  • Compression couplings connect two sections of pipe together to direct flow one-way through system
  • Compression tees adds a “T” intersection from one pipeline splitting off into two different directions to create a lateral branch in system
  • Compression adapters transition from unthreaded to threaded pipe to direct flow one-way through system
  • Unions connect pipe without the need for traditional glued sealant; center of union can be pulled apart to quickly disconnect pipes
  • Use for pool and spa, irrigation, and plumbing applications; works with most plastic pipe to transport water and provide a leak-resistant connection

Installation & Maintenance

  • Compression fittings have slip or threaded ends that connect to pipe ends; use solvent to secure slip end
  • Unions have two slip or threaded ends that connect to pipe ends; no glued sealant necessary
  • Compression fitting performance issues can indicate damage; replace as needed

Materials & Sustainability

  • Compression fittings and unions are made of polyvinyl chloride (PVC)
  • Union has an EPDM O-ring in center to create leak-resistant seal
  • Onsite flow management helps provide a leak-resistant and corrosion-free system

Product Models

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67 products

    Part Number
    (click for more info)    		 Description
    CPA-1000 PVC Compression Adapter, 1 in. IPS UC X 1 in. IPS MPT, White
    CPA-1500 PVC Compression Adapter, 1-1/2 in. IPS UC X 1-1/2 in. IPS MPT, White
    CPA-1250 PVC Compression Adapter, 1-1/4 in. IPS UC X 1-1/4 in. IPS MPT, White
    CPA-2000 PVC Compression Adapter, 2 in. IPS UC X 2 in. IPS MPT, White
    CPA-0750 PVC Compression Adapter, 3/4 in. IPS UC X 3/4 in. IPS MPT, White
    CCC-1000 PVC Compression Coupling, 1 in. CTS UC, White
    CPC-1000 PVC Compression Coupling, 1 in. IPS UC, White
    CCC-0500 PVC Compression Coupling, 1/2 in. CTS UC, White
    CPC-0500 PVC Compression Coupling, 1/2 in. IPS UC, White
    CPC-1500 PVC Compression Coupling, 1-1/2 in. IPS UC, White
    CPC-1250 PVC Compression Coupling, 1-1/4 in. IPS UC, White
    CPC-2000 PVC Compression Coupling, 2 in. IPS UC, White
    CPC-2500 PVC Compression Coupling, 2-1/2 in. IPS UC, White
    CPC-3000 PVC Compression Coupling, 3 in. IPS UC, White
    CCC-0750 PVC Compression Coupling, 3/4 in. CTS UC, White
    CPC-0750 PVC Compression Coupling, 3/4 in. IPS UC, White
    CPC-4000 PVC Compression Coupling, 4 in. IPS UC, White
    CPC-6000 PVC Compression Coupling, 6 in. IPS UC, White
    CPT-1000-T PVC Compression Tee, 1 in. IPS UC X 1 in. UC X 1 in. FPT, White
    CPT-1000-S PVC Compression Tee, 1 in. IPS UC X 1 in. UC X 1 in. S, White
    CPT-1500-T PVC Compression Tee, 1-1/2 in. IPS UC X 1-1/2 in. UC X 1-1/2 in. FPT, White
    CPT-1500-S PVC Compression Tee, 1-1/2 in. IPS UC X 1-1/2 in. UC X 1-1/2 in. S, White
    CPT-1250-T PVC Compression Tee, 1-1/4 in. IPS UC X 1-1/4 in. UC X 1-1/4 in. FPT, White
    CPT-1250-S PVC Compression Tee, 1-1/4 in. IPS UC X 1-1/4 in. UC X 1-1/4 in. S, White
    CPT-2000-T PVC Compression Tee, 2 in. IPS UC X 2 in. UC X 2 in. FPT, White
    CPT-2000-S PVC Compression Tee, 2 in. IPS UC X 2 in. UC X 2 in. S, White
    CPT-0750-T PVC Compression Tee, 3/4 in. IPS UC X 3/4 in. UC X 3/4 in. FPT, White
    CPT-0750-S PVC Compression Tee, 3/4 in. IPS UC X 3/4 in. UC X 3/4 in. S, White
    1600-15 PVC Union Adapter, 1-1/2 in. IPS S X Spigot, White
    1600-20 PVC Union Adapter, 2 in. IPS S X Spigot, White
    U2-1000-S PVC Union, 1 in. IPS S X S, Gray
    WU-1000-S PVC Union, 1 in. Sch. 40 S X S, White
    U-1000-T PVC Union, 1 in. Sch. 80 FPT X FPT, Gray
    U-1000-TM PVC Union, 1 in. Sch. 80 FPT X MPT, Gray
    U-1000-ST PVC Union, 1 in. Sch. 80 S X FPT, Gray
    U-1000-SM PVC Union, 1 in. Sch. 80 S X MPT, Gray
    U-1000-S PVC Union, 1 in. Sch. 80 S X S, Gray
    U-0500-T PVC Union, 1/2 in. Sch. 80 FPT X FPT, Gray
    U-0500-S PVC Union, 1/2 in. Sch. 80 S X S, Gray
    WU-1500-S PVC Union, 1-1/2 in. Sch. 40 S X S, White
    U-1500-T PVC Union, 1-1/2 in. Sch. 80 FPT X FPT, Gray
    U-1500-ST PVC Union, 1-1/2 in. Sch. 80 S X FPT, Gray
    U-1500-SM PVC Union, 1-1/2 in. Sch. 80 S X MPT, Gray
    U-1500-S PVC Union, 1-1/2 in. Sch. 80 S X S, Gray
    WU-1250-T PVC Union, 1-1/4 in. Sch. 40 FPT X FPT, White
    WU-1250-S PVC Union, 1-1/4 in. Sch. 40 S X S, White
    U-1250-T PVC Union, 1-1/4 in. Sch. 80 FPT X FPT, Gray
    U-1250-S PVC Union, 1-1/4 in. Sch. 80 S X S, Gray
    WU-2000-T PVC Union, 2 in. Sch. 40 FPT X FPT, White
    WU-2000-S PVC Union, 2 in. Sch. 40 S X S, White
    U-2000-T PVC Union, 2 in. Sch. 80 FPT X FPT, Gray
    U-2000-ST PVC Union, 2 in. Sch. 80 S X FPT, Gray
    U-2000-SM PVC Union, 2 in. Sch. 80 S X MPT, Gray
    U-2000-S PVC Union, 2 in. Sch. 80 S X S, Gray
    U-2500-T PVC Union, 2-1/2 in. Sch. 80 FPT X FPT, Gray
    U-2500-S PVC Union, 2-1/2 in. Sch. 80 S X S, Gray
    WU-3000-S PVC Union, 3 in. Sch. 40 S X S, White
    U-3000-T PVC Union, 3 in. Sch. 80 FPT X FPT, Gray
    U-3000-S PVC Union, 3 in. Sch. 80 S X S, Gray
    WU-0750-T PVC Union, 3/4 in. Sch. 40 FPT X FPT, White
    WU-0750-S PVC Union, 3/4 in. Sch. 40 S X S, White
    U-0750-T PVC Union, 3/4 in. Sch. 80 FPT X FPT, Gray
    U-0750-SM PVC Union, 3/4 in. Sch. 80 S X MPT, Gray
    U-0750-S PVC Union, 3/4 in. Sch. 80 S X S, Gray
    WU-4000-S PVC Union, 4 in. Sch. 40 S X S, White
    U-4000-T PVC Union, 4 in. Sch. 80 FPT X FPT, Gray
    U-4000-S PVC Union, 4 in. Sch. 80 S X S, Gray

    Specifications & Documents