CMP 2" MIP x 2-1/2" Socket High-Temp Self-Sealing Pool Union | 21063-250-000

The CMP 21063-250-000 High-Temperature Self-Sealing Union is a professional-grade pool and spa plumbing fitting designed to connect a 2-inch female-threaded equipment port to 2-1/2-inch PVC pipe. Manufactured by Custom Molded Products (CMP), this union features durable black Noryl resin construction and an integrated T-gasket sealing design for dependable plumbing connections.

Ideal for swimming pool pumps, filters, heaters, and other compatible equipment, the CMP 21063-250-000 provides a removable connection that simplifies equipment servicing and replacement without cutting existing plumbing. Its high-temperature construction makes it particularly useful for demanding pool equipment installations.

Product Features

• 2" MIP x 2-1/2" Socket: Connects compatible 2-inch female-threaded equipment ports to 2-1/2-inch nominal PVC pipe.
• High-Temperature Construction: Manufactured from black Noryl resin designed for demanding pool and spa plumbing applications.
• Self-Sealing Design: Engineered to seal without additional thread sealing tape or pipe dope when installed according to CMP instructions.
• Integrated T-Gasket: Provides a dependable seal between the union components.
• Removable Union Connection: Allows equipment to be disconnected for maintenance and replacement without cutting PVC pipe.
• Professional-Grade Construction: Designed for durable pool plumbing installations and repairs.
• Corrosion-Resistant Material: Non-metallic construction resists rust and corrosion.
• Genuine CMP Product: Manufactured by Custom Molded Products.

Product Specifications

• Manufacturer: Custom Molded Products (CMP)
• Manufacturer Part Number: 21063-250-000
• Distributor Part Number: SPG-56-2007
• Product Type: High-Temperature Self-Sealing Union
• Connection Size: 2" x 2-1/2"
• Equipment Connection: 2" Male Pipe Thread (MIP/MPT)
• Plumbing Connection: 2-1/2" Female Socket (Slip)
• Material: High-Temperature Noryl Resin
• Color: Black
• Seal Type: Self-Sealing T-Gasket
• Installation: Threaded Equipment Connection x Solvent-Weld PVC Socket
• OEM Cross Reference: Praher 225-9061
• Application: Pool and Spa Plumbing
• Quantity: 1 Complete Union Assembly

Common Applications

• Swimming pool pump inlet and outlet connections
• Pool filter plumbing installations
• Pool heater plumbing connections
• Spa equipment plumbing
• Pool equipment pad renovations
• Equipment replacement and plumbing modifications
• Connections requiring 2" male threads and 2-1/2" PVC pipe

High-Temperature Noryl Construction

The CMP 21063-250-000 is manufactured from high-temperature black Noryl resin, a durable engineering thermoplastic commonly used in pool pump housings and related equipment. Its construction provides excellent durability and corrosion resistance for compatible swimming pool plumbing applications.

Unlike ordinary white PVC unions, CMP's high-temperature union series is specifically designed for applications where elevated operating temperatures and demanding equipment conditions make material selection important.

Self-Sealing T-Gasket Design

The CMP high-temperature union incorporates a self-sealing design that eliminates the need for conventional thread sealing tape or pipe dope when installed according to manufacturer instructions.

The union's T-gasket helps establish a secure connection while allowing the assembly to be separated during equipment servicing. This design makes it easier to remove pumps, filters, or other equipment without permanently altering the connected PVC plumbing.

Replacement Union Components

According to CMP's replacement parts catalog, the 21063-250-000 union assembly uses the following components:

• CMP 21063-230-030: Union Nut
• CMP 21063-250-010: 2-1/2" Socket PVC Tailpiece
• CMP 26200-289-049: Union T-Gasket
• CMP 21063-230-010: 2" MIP Threaded Component
• CMP 26100-590-500: Replacement O-Ring

Replacement components are sold separately when available.

Installation Information

1. Turn off all connected pool equipment and completely relieve plumbing system pressure.
2. Verify that the equipment connection has compatible 2-inch female pipe threads.
3. Confirm that the plumbing connection uses nominal 2-1/2-inch rigid PVC pipe.
4. Inspect the union sealing components and confirm the T-gasket is correctly positioned.
5. Install the threaded union component according to CMP's self-sealing installation instructions.
6. Cut, deburr, and clean the PVC pipe before installing the socket tailpiece.
7. Use compatible PVC primer and solvent cement on the PVC socket connection according to the applicable installation instructions.
8. Allow the solvent-welded joint to cure fully before pressurizing the plumbing.
9. Connect the union components and tighten according to CMP's instructions without overtightening.
10. Restart the equipment and inspect all connections for leaks.

Related CMP Pool Plumbing Unions

Aqua Pool Supply carries additional CMP union configurations for installations requiring different plumbing sizes and materials.

• CMP 21063-200-000 – 2" MIP x 2" Socket High-Temperature Union – High-temperature black Noryl union for applications requiring 2-inch male threads and 2-inch PVC pipe instead of the 2-1/2-inch socket configuration.
• CMP 21063-210-000 – 2" MIP x 2" Socket Self-Sealing PVC Union – White PVC self-sealing union alternative for compatible 2-inch plumbing applications.

Recommended PVC Installation Supplies

Complete the solvent-welded PVC connection with appropriate pool plumbing installation materials.

• Weld-On 13567 – 746 Pool Heavy Gray PVC Cement, 1 Quart – Heavy-bodied, medium-setting PVC solvent cement for compatible rigid PVC pipe and fittings. Use for the PVC socket connection according to the union manufacturer's instructions.

Additional CMP Pool Plumbing Products

Explore our CMP Pool Plumbing Unions & Replacement Parts for additional fittings, plumbing components, and equipment accessories.

Package Includes: One (1) genuine CMP 21063-250-000 2" MIP x 2-1/2" Socket High-Temperature Self-Sealing Union Assembly.

Compatibility: This union is designed for equipment connections requiring 2-inch male pipe threads and plumbing connections accepting 2-1/2-inch nominal PVC pipe. It is not a 2-1/2-inch threaded union or a 2-inch socket x 2-1/2-inch socket reducer. Verify connection sizes, thread compatibility, and installation requirements before ordering.

Important: The CMP self-sealing union is designed to seal without conventional thread tape or pipe dope. Follow CMP installation instructions to prevent damage to the union or connected equipment. The PVC socket connection still requires an appropriate solvent-weld installation.