1X3/4X3/4 PRO PEX TEE

🔧 ProPEX Reducing Tee (Uponor-style expansion fitting)

It’s a PEX plumbing tee fitting used to branch a larger 1" PEX line down into two 3/4" PEX lines.

⚙️ Breaking down the code

• 1 × 3/4 × 3/4 → reducing tee size
  • one 1" inlet/outlet (main line)
  • two 3/4" branch outlets
• PRO PEX → ProPEX expansion system (typically Uponor/PEX-A system)
• TEE → 90° branch fitting (one line splits into two directions)

🔧 What it does

This fitting is used to:

• Split a 1" main water line into two 3/4" branch lines
• Maintain full-flow distribution in PEX plumbing systems
• Create clean branch points in:
  • water supply systems
  • hydronic heating systems

🧰 Key features

• Material: engineered polymer or brass (depending on version)
• Connection type: cold expansion (PEX-A) system
• Requires:
  • expansion tool
  • ProPEX rings (PEX-A memory expansion method)
• Full-flow design (no internal flow restriction compared to some crimp fittings)

🏠 Where it’s used

• Residential plumbing rough-in
• Manifold-style water distribution systems
• Hydronic/radiant heating loops
• High-flow fixture branch layouts

🧠 Simple explanation

It’s basically a T-shaped plumbing connector that takes a big 1-inch PEX water line and splits it into two smaller 3/4-inch lines using the expansion-fit PEX system.

⚠️ Important note

• Only works with PEX-A expansion tubing (Uponor-style system)
• Not compatible with:
  • PEX-B crimp systems
  • PEX-C systems
  • push-fit systems