The 3/4" PEX-B × Polybutylene Coupling is a high-quality transition fitting designed to connect PEX-B tubing to existing polybutylene (PB) piping systems. Made from durable poly alloy, this coupling provides a secure, corrosion-resistant connection for residential plumbing retrofits and repairs. It is compatible with crimp or clamp ring systems and meets industry standards for potable water applications.

Key Features

• Transition Design – Connects 3/4" PEX-B tubing to 3/4" polybutylene pipe.
• Durable Poly Alloy Construction – Resists corrosion and chemical damage.
• Lead-Free & Safe – Certified for potable water systems.
• Crimp or Clamp Compatibility – Works with standard PEX-B installation methods.
• High-Temperature & Pressure Rating – Suitable for hot and cold water lines.
• Industry Certified – Meets ASTM F1807 and NSF/ANSI standards.

Specifications

• Model / SKU: APXBC3434
• Material: Poly Alloy
• Connection Type: Transition Coupling
• Pipe Compatibility: PEX-B tubing and polybutylene pipe
• Size: 3/4 inch
• Installation Method: Crimp or Clamp
• Certifications: NSF/ANSI 61, ASTM F1807

Recommended Applications

• Potable Water Systems – Safe for drinking water lines.
• Residential Plumbing Retrofits – Transition from PB to PEX-B piping.
• Hot & Cold Water Distribution – Reliable performance in all conditions.
• Commercial Plumbing Repairs – Ideal for replacing outdated polybutylene systems.

Installation Tips

• Cut both PEX and PB tubing square and ensure ends are clean.
• Slide appropriate crimp or clamp ring over each pipe before inserting coupling.
• Position rings 1/8"–1/4" from tubing ends and secure with the correct tool.
• Verify connection integrity with a pressure test.