3/4 inch x 5/8 inch Brass Gas Reducing Adapter Male x OD Flare

MAU2-10-12S Brass Adapter – 3/4 inch MPT x Flare for Flexible Connector Integration

The MAU2-10-12S Brass Adapter is a precision-machined fitting designed to transition between a 3/4 inch male pipe thread (MPT) and a flared outlet connection, commonly used for attaching flexible water or gas connectors to rigid supply lines. Its brass construction ensures compatibility with a range of residential and light commercial plumbing systems where mechanical strength and corrosion resistance are critical.

This adapter supports secure and code-compliant connections in water heater installations, appliance hookups, and retrofit configurations. The flared end is engineered for compatibility with flexible connectors equipped with matching 45° flare nuts, allowing a metal-to-metal seal without the need for thread sealant at the joint interface.

Performance Characteristics

• ✅ Dual-Function Connection: Interfaces a rigid 3/4 inch MPT pipe with a 3/4 inch OD flared tubing or connector.
• ✅ Brass Alloy Construction: Manufactured from lead-free brass per applicable low-lead regulations for potable system use.
• ✅ Temperature and Pressure Rated: Suitable for typical domestic water supply and gas line pressures within plumbing code limits.
• ✅ High Thread Integrity: Threads machined to ASME B1.20.1 standards to ensure proper engagement and leak-free sealing when installed with compatible fittings.

Technical Specifications

• Model: MAU2-10-12S
• Material: Lead-free brass (typically meets ASTM B584)
• Inlet: 3/4 inch Male Pipe Thread (NPT)
• Outlet: 3/4 inch OD Flare (45°)
• Use Classification: Water or gas connector interface; non-flexible to flexible transition

Installation Notes

• Apply PTFE tape or approved thread sealant to the MPT side only. Do not use sealant on the flare connection.
• Ensure flare mating surfaces are clean and undamaged to achieve a proper seal.
• Torque to manufacturer-recommended values to avoid thread damage or under-tightening.

Application Scope

This fitting is typically installed where rigid supply lines terminate and require a transition to flexible braided, stainless, or coated connectors in systems such as water heaters, boilers, lavatory connections, and select gas appliance hook-ups. It allows flexibility in alignment and reduces mechanical stress on adjoining components.

Material Note

Brass offers chemical resistance and is suitable for use with both potable water and fuel gas systems, depending on local code approvals. Lead-free variants support compliance with NSF/ANSI 61 and 372 standards when used in drinking water applications.

The MAU2-10-12S Brass Adapter delivers a durable, code-compliant solution for connecting flexible supply lines to rigid piping systems. Its precision-machined threads and flared seat support consistent performance across a wide range of installation environments.