Merit Brass MB12310 Copper Press Coupling 1 Inch

Product Description

The MERIT BRASS MB12310 is a 1-inch copper coupling without stop, designed for push-to-connect press fitting installations in potable water and hydronic plumbing systems. It connects two sections of copper pipe without a center stop, allowing the fitting to slide fully onto the pipe — a common requirement when making repairs on existing lines without cutting out extra pipe length. Rated to 300 psi maximum working pressure and 250 degrees F maximum working temperature, this fitting is lead-free and certified to NSF-61/372 and IAPMO PS117 standards. Licensed plumbers and pipefitters install this fitting on residential and light commercial piping systems.

This press coupling is suited for new construction and retrofit plumbing applications where copper pipe is used for domestic water supply, hydronic heating, or radiant systems. The push-to-connect press design eliminates open-flame soldering, making it well suited for installations in tight spaces, near combustibles, or in jurisdictions where torch work requires additional permits. The coupling without stop configuration is particularly useful in repair scenarios where minimal pipe removal is preferred.

Key Features

• No-stop design allows the fitting to slide fully over the pipe for repair and retrofit work
• Press fitting connection — no soldering, flux, or open flame required
• Rated to 300 psi maximum working pressure
• Temperature range: 0 degrees F to 250 degrees F
• Lead-free copper construction, compliant with NSF-61/372 and IAPMO PS117
• Outside diameter of 1.508 inches for standard 1-inch copper pipe

Compatibility

Designed for use with standard 1-inch copper pipe in push-to-connect press fitting systems. Compatible with plumbing systems where fittings meeting NSF-61/372 and IAPMO PS117 are required for potable water service.

Installation Notes

Installation requires a press tool compatible with the fitting manufacturer's jaw profile — verify tool compatibility before pressing. Shut off water supply and depressurize the line before cutting pipe or removing existing fittings. Follow IPC and local plumbing code requirements for press fitting use in potable water systems. Inspect the pipe end for burrs and deburr as needed before inserting into the fitting to ensure a proper press seal.