Description
Schedule 40 PVC Union (FPT x FPT) Buna
Schedule 40 PVC Union (FPT x FPT) Buna provides a serviceable threaded connection between compatible piping components using two Female Pipe Thread connections and a Buna-N O-ring seal. The union design allows the connection to be separated at the union nut without disturbing the adjoining threaded piping.
The Female Pipe Thread x Female Pipe Thread union configuration accepts appropriately sized male threaded components on both ends while providing a removable union joint between them. Selection should account for nominal size, Schedule 40 PVC compatibility, mating thread sizes, Buna-N O-ring compatibility, intended service conditions, piping alignment, and available installation clearance.
Product Highlights
- PVC construction
- Schedule 40 design
- Union configuration
- FPT x FPT connections
- Buna-N O-ring seal
- Accepts compatible male threaded components
- Allows separation without disturbing adjoining piping
- Supports serviceable connections in compatible PVC piping systems
Technical Specifications
| Product Type | Union |
|---|---|
| Material | PVC |
| Schedule | Schedule 40 |
| Configuration | Threaded Union |
| Connection | Female Pipe Thread (FPT) x Female Pipe Thread (FPT) |
| Thread Interfaces | Compatible Male Pipe Threads |
| O-Ring Material | Buna-N |
| Joining Method | Threaded Connections with Union Joint |
| Union Function | Serviceable Threaded Piping Connection |
| Primary Function | Connect and Allow Separation of Compatible Threaded Piping Components |
Threaded Union Design
The threaded union configuration provides a connection that can be separated at the union joint while the adjoining threaded components remain in place. This allows sections of piping or connected equipment to be disconnected without cutting the piping or rotating the entire adjoining assembly.
The union nut brings the mating union components together while the Buna-N O-ring provides the sealing interface. Nominal size, mating thread compatibility, piping alignment, O-ring compatibility, and adjoining components should be confirmed before ordering.
Female Threaded Connections
The two Female Pipe Thread connections accept appropriately sized compatible male threaded components. Each mating connection should have the correct nominal size and compatible thread configuration before assembly.
Threaded PVC components should be assembled carefully using compatible sealing materials and appropriate installation practices. Excessive tightening should be avoided to help minimize unnecessary mechanical stress on the PVC union body.
Buna-N O-Ring Seal
The Buna-N O-ring provides the sealing element between the mating portions of the union. The O-ring should be clean, properly positioned, and free from visible damage before the union joint is assembled.
Seal-material compatibility should be evaluated for the intended fluid and operating conditions of the piping system. The O-ring and mating sealing surfaces should also be inspected whenever the union is opened for service or maintenance.
Serviceable Threaded Connection
A Schedule 40 PVC FPT x FPT Union provides a convenient connection where future separation of threaded piping or connected equipment may be required. The union joint can be disconnected while the female threaded ends remain connected to their adjoining male threaded components.
Application suitability should be evaluated using the requirements of the complete piping system. Nominal size, thread compatibility, Buna-N compatibility, service conditions, piping support, system alignment, and applicable installation practices should all be considered during selection.
Installation & Selection Considerations
- Confirm the nominal size.
- Verify FPT x FPT configuration.
- Confirm Buna-N seal compatibility.
- Check both mating male threaded components.
- Support piping to maintain proper union alignment.
Our PVC fitting specialists can help review nominal size, Schedule 40 requirements, FPT x FPT configuration, Buna-N O-ring compatibility, mating threaded components, intended service conditions, piping support, and available installation clearance before you order.
Frequently Asked Questions
What is a Schedule 40 PVC FPT x FPT Union used for?
It connects compatible male threaded piping components while allowing the union joint to be separated for service or maintenance.
What does FPT x FPT mean?
FPT x FPT means the union has a Female Pipe Thread connection on both ends.
What type of O-ring does this union use?
This union configuration uses a Buna-N O-ring seal.
What connects to the female threaded ends?
Each FPT connection accepts an appropriately sized compatible male threaded component.
Can the union be disconnected after installation?
Yes. The union joint is designed to separate while the threaded ends remain connected to the adjoining piping components.
What should I confirm before ordering?
Confirm nominal size, Schedule 40 PVC requirements, FPT x FPT configuration, Buna-N compatibility, mating thread sizes, and installation conditions.
Important Ordering & Installation Notes
- Confirm the nominal size.
- Verify FPT x FPT configuration.
- Inspect the Buna-N O-ring before assembly.
- Confirm both mating male threaded connections.
- Maintain proper piping alignment at the union.
