1 inch x 3/4 inch PEX Polyalloy Reducing Insert Coupling Crimp x Crimp

1 inch x 3/4 inch PEX PolyAlloy Reducing Insert Coupling – ASTM F1807 Compliant

The 1 inch x 3/4 inch PEX PolyAlloy Reducing Insert Coupling is a high-strength thermoplastic fitting used to connect dissimilar PEX tubing sizes in potable water and hydronic distribution systems. Designed in accordance with ASTM F1807, this coupling features insert-style barbed ends for use with copper crimp rings or stainless steel clamp rings in cold expansion or compression systems.

Constructed from durable polysulfone (polyalloy) material, this component offers excellent chemical resistance, UV stability, and dimensional consistency. It is lead-free and certified for use in drinking water applications under NSF/ANSI 61 and 372 standards. Its corrosion-resistant properties make it a reliable choice for long-term use in hot and cold water systems.

Technical Specifications

• Material: Engineered polymer (polyalloy, polysulfone-based)
• End Connections: Insert x Insert (for use with crimp or clamp connections)
• Nominal Sizes: 1 inch x 3/4 inch
• Standards: ASTM F1807, CSA B137.5
• Certifications: NSF/ANSI 61 and 372 for potable water systems
• Temperature Rating: Up to 200°F
• Pressure Rating: Up to 160 PSI at 73°F (dependent on tubing system)

Application Scope

This reducing coupling is used to connect two different diameters of PEX tubing in pressure-rated plumbing systems. Common installations include:

• ✅ Residential and commercial potable water distribution
• ✅ Hydronic heating circuits
• ✅ Distribution manifolds and fixture connections
• ✅ Retrofit piping transitions or layout modifications

Installation Considerations

Install using approved ASTM F1807 crimp or clamp methods. Ensure all tubing ends are cleanly cut, fully inserted, and properly aligned prior to crimping. Use an approved crimping or cinch tool calibrated for PEX systems. Verify joint integrity through visual inspection and pressure testing in accordance with local code requirements.

Key Performance Characteristics

• ✅ Lead-Free and Code-Compliant: Conforms to U.S. Safe Drinking Water Act and applicable building codes
• ✅ Non-Corrosive Polymer Body: Ideal for aggressive water conditions and areas prone to electrolysis
• ✅ Thermal Stability: Maintains mechanical strength in hot water service environments
• ✅ Compact Profile: Allows for use in confined spaces and behind-wall installations

Compliance and Approval Notes

This fitting is listed for potable water distribution systems and must be installed in accordance with ASTM F1807 practices. Always confirm with the Authority Having Jurisdiction (AHJ) regarding local code approvals before use in regulated installations.

The 1 inch x 3/4 inch PEX PolyAlloy Reducing Insert Coupling offers dependable performance and dimensional precision for professional plumbing systems. Its engineered polymer construction provides resistance to scaling, corrosion, and thermal stress—making it a reliable solution for long-term installations.