1/2 inch x 3/4 inch PEX Brass Reducing Insert Adapter Crimp x Male

Viega 46324 PEX Crimp Adapter – 1/2" PEX x 3/4" MPT Brass Fitting

The Viega 46324 adapter is a precision-machined brass fitting that transitions 1/2" PEX tubing to a 3/4" male NPT connection. Manufactured from lead-free brass in accordance with federal and state potable water standards, this crimp-style adapter is engineered for dependable performance in pressurized potable and hydronic systems.

Compatible with ASTM F1807 crimp fittings and CSA B137.5-compliant PEX systems, the Viega 46324 offers a corrosion-resistant solution suitable for both residential and light commercial installations. It supports secure connections between cross-linked polyethylene piping and threaded metal system components without the need for soldering or adhesives.

Product Features

• ✅ Crimp Connection: PEX end accepts 1/2" PEX tubing secured using copper rings and standard crimp tools.
• ✅ Male NPT Thread: 3/4" male pipe thread outlet designed for direct threaded connection to valves, fittings, or appliances.
• ✅ Lead-Free Brass: Manufactured to meet ANSI/NSF 61 and NSF 372 requirements for potable water use.
• ✅ Corrosion Resistance: Forged brass construction minimizes dezincification and stress corrosion cracking.
• ✅ Working Pressure: Rated up to 200 psi at 200°F when installed per PEX system manufacturer specifications.

Specifications

• Manufacturer: Viega
• Model: 46324
• Material: Lead-free brass
• PEX Side: 1/2" crimp connection
• Threaded Side: 3/4" Male NPT
• Certifications: NSF 61, NSF 372, CSA B137.5, ASTM F1807

Application

This adapter is typically used in potable water distribution and hydronic heating systems to connect PEX tubing to threaded fixtures, manifolds, or transition fittings. It is suitable for in-wall or exposed installations in accordance with local code requirements.

Installation Notes

Install using approved crimp tools and PEX rings in accordance with the tubing manufacturer’s guidelines. Apply thread sealant or PTFE tape to the NPT side as required for a watertight seal. Do not overtighten threaded connections to avoid damaging the fitting or connected components.

Code Compliance

Lead-free brass fittings like the Viega 46324 are mandated for all potable water installations in the United States under the Reduction of Lead in Drinking Water Act. This fitting complies with current national and local plumbing codes when installed as part of an approved PEX system.

For contractors working with mixed piping systems or in retrofits requiring threaded transitions, the Viega 46324 provides a dependable and code-compliant connection point between PEX tubing and metal components. Its robust design and dimensional accuracy make it a staple in modern plumbing installations.