Nomaco PETRFIT34 Transition Fitting 3/4 Inches

Product Description

The NOMACO PETRFIT34 is a 3/4 inch transition fitting designed to connect steel pipe to crosslinked polyethylene (PEX or Xpoly) tubing. Transition fittings like this one are essential in plumbing and hydronic systems where a metallic supply line meets a flexible polymer distribution line. This fitting maintains a secure, leak-resistant joint between two dissimilar materials, handling the mechanical and thermal expansion differences that occur in service. It is installed by licensed plumbers and pipefitters working on residential or light commercial water distribution, heating, and radiant floor systems.

This fitting is suited for applications where existing steel or iron piping transitions to crosslinked polyethylene tubing. Common scenarios include retrofitting older steel supply lines with modern PEX distribution, connecting to manifold systems in radiant heating, and service upgrades in residential plumbing rough-in. The 3/4 inch size covers a standard distribution line diameter used widely in both domestic water and hydronic heating applications.

Key Features

• Provides a reliable transition between steel pipe and crosslinked polyethylene tubing
• 3/4 inch diameter matches a common standard plumbing and hydronic line size
• Steel construction on the metallic side supports threaded connections to iron or galvanized pipe
• Suitable for use in retrofit and new-installation plumbing scenarios
• Compact fitting profile minimizes space requirements in tight rough-in areas

Compatibility

Designed as an OEM-style transition fitting for 3/4 inch steel-to-crosslinked-polyethylene connections in residential and light commercial plumbing or hydronic systems.

Installation Notes

Installation should be performed by a licensed plumber in accordance with local plumbing codes and the International Plumbing Code (IPC) where applicable. Shut off and depressurize the water supply before beginning any fitting work. Ensure steel-side threads are clean and use the appropriate thread sealant or tape rated for the service fluid. Follow the crosslinked polyethylene manufacturer instructions for the tubing connection method, whether crimp, clamp, or expansion style.

Technical Specifications

• Connection Size: 3/4 inches
• Material: Steel to Crosslinked Polyethylene (Xpoly)
• Fitting Type: Transition

Standard Information

• Brand: NOMACO
• Manufacturer Part Number: PETRFIT34