Description
Schedule 80 CPVC FKM Union (FPT x FPT)
Schedule 80 CPVC FKM Union (FPT x FPT) provides a serviceable threaded connection between compatible male-threaded piping components. The fitting uses Female Pipe Thread connections on both ends with an FKM sealing element at the removable center union joint.
The Schedule 80 CPVC FKM Union allows the connection to be separated for maintenance, equipment access, or piping changes without cutting adjoining piping. Selection should account for nominal size, male-thread compatibility, FKM seal compatibility, system conditions, and proper threaded CPVC installation procedures.
Product Highlights
- CPVC construction
- Schedule 80 design
- FKM sealing element
- Serviceable union design
- FPT x FPT connections
- Two female-threaded interfaces
- Accepts compatible male-threaded components
- Allows disassembly without cutting adjoining piping
Technical Specifications
| Product Type | Union |
|---|---|
| Material | CPVC |
| Schedule | Schedule 80 |
| Configuration | Threaded Union |
| Connection | Female Pipe Thread (FPT) x Female Pipe Thread (FPT) |
| Thread Interface | Compatible Male Pipe Thread |
| Connection Count | Two End Connections |
| Seal Material | FKM |
| Joining Method | Threaded Connections with Serviceable Union Joint |
| Primary Function | Provide a Serviceable Connection Between Compatible Male-Threaded Components |
Union Design
The union design provides a removable center joint between two female-threaded ends. This creates a convenient service point that allows adjoining threaded piping or equipment to be separated without cutting the piping system.
The union should be positioned where the center joint remains accessible after installation. Proper alignment should be maintained so the threaded ends and union joint can be assembled without unnecessary mechanical stress.
FPT x FPT Connections
The FPT x FPT configuration provides Female Pipe Thread connections on both ends of the union. Each end accepts an appropriately sized compatible male-threaded component.
Threads should be clean and properly aligned before assembly. Appropriate threaded plastic-piping procedures and compatible sealing materials should be used while avoiding excessive tightening.
FKM Seal
The FKM sealing element provides the seal at the removable center union joint. The seal should remain clean, properly positioned, and free from visible damage during assembly.
FKM compatibility should be reviewed against the fluid and operating conditions of the intended piping system. The sealing element should also be inspected whenever the union is opened for service.
Schedule 80 CPVC Application
A Schedule 80 CPVC FKM Union FPT x FPT provides a serviceable separation point in a threaded CPVC piping arrangement. The center union joint allows future disassembly while the threaded end connections remain installed.
System temperature, pressure, fluid compatibility, thread compatibility, and applicable installation requirements should be reviewed for the intended application. Proper piping support should be maintained on both sides of the union.
Installation & Selection Considerations
- Confirm the nominal size.
- Verify both FPT connections.
- Confirm FKM seal compatibility.
- Check male-thread compatibility.
- Avoid excessive threaded tightening.

Our piping specialists can help review nominal size, FPT connections, male-thread compatibility, FKM seal requirements, service access, and installation considerations before you order.
Frequently Asked Questions
What is a Schedule 80 CPVC FKM Union FPT x FPT used for?
It provides a serviceable threaded connection between compatible male-threaded piping components.
What does FPT x FPT mean?
It means the union has Female Pipe Thread connections on both ends.
What type of seal does this union use?
This union uses an FKM sealing element at the removable center joint.
Can the union be disconnected after installation?
Yes. The center union joint can be separated while the threaded end connections remain installed.
How should the threaded connections be installed?
Use appropriate threaded plastic-piping procedures and compatible sealing materials while avoiding excessive tightening.
What should I confirm before ordering?
Confirm nominal size, FPT x FPT configuration, FKM compatibility, mating male threads, and system requirements.
Important Ordering & Installation Notes
- Confirm the nominal size.
- Verify both FPT connections.
- Confirm FKM compatibility.
- Inspect the seal before assembly.
- Avoid excessive tightening of CPVC threads.