Praher 200-903 2" Slip × 2" MPT Full-Flow Union with O-Ring
The Praher 200-903 is a full-flow union fitting designed for use with 2" pool and spa plumbing — commonly used on Praher backwash and multiport valves. It provides a robust, leak-resistant connection that’s easy to install and service, making it ideal for both new installations and maintenance work.
Key Features
- 2" male-pipe-thread (MPT) × 2" slip (socket) union — simple, versatile connection for many plumbing setups.
- Full-flow design — minimal flow restriction, maintaining optimal water circulation and system efficiency.
- Includes a durable O-ring seal — ensures reliable, watertight connection without the need for additional sealant or tape.
- Made from pool-rated PVC — corrosion- and chemical-resistant for long service life in pool and spa environments.
- Easy to disassemble and reassemble for valve or plumbing maintenance — convenient for seasonal service, winterization, or equipment swaps.
Specifications
- Manufacturer: Praher Plastics
- Part Number: 200-903
- Connection 1: 2" Male Pipe Thread (MPT)
- Connection 2: 2" Slip / Socket (Schedule 40 PVC)
- Seal: Integrated O-ring (usually EPDM / pool-safe material)
- Material: Grade-1 PVC (pool-rated)
- Typical Use: Unions on Praher backwash / multiport valves or 2" PVC plumbing systems
Why Use 200-903
If you’re installing or replacing a 2" valve — especially from Praher — the 200-903 union offers a dependable, OEM-grade connection that supports full water flow and resists leaks. It’s an excellent choice for new pool builds, repairs, or service-professional plumbing work where reliability and ease of maintenance matter most.
Installation & Maintenance Tips
- Ensure the slip side is solvent-welded into the PVC plumbing per standard Schedule 40 PVC cement procedures.
- Thread the MPT side into the valve housing hand-tight, then finish with a quarter turn if needed — avoid over-tightening to protect threads and O-ring seal.
- Before first use and after seasonal shutdown, inspect the O-ring for wear or cracks and replace if needed to maintain leak-free service.
- When removing for maintenance, slightly back off the union to relieve pressure before loosening to avoid stress on valve components.
