Merit Brass MB12240 Copper Press Coupling with Stop 3/4

Product Description

The MERIT BRASS MB12240 is a 3/4 inch copper press coupling with stop, designed for push-to-connect installation in residential and light commercial plumbing systems. The integral stop feature controls pipe insertion depth, ensuring consistent, repeatable connections without the need for soldering or open flame. Built from copper and rated for up to 300 psi working pressure and 250 degrees F maximum temperature, this fitting is suited for hot and cold potable water supply lines. It carries Lead Free and NSF-61/372 certifications, meeting requirements for systems that contact drinking water. Licensed plumbers and pipefitters are the primary installers of this type of press fitting.

This coupling is used in residential and commercial water distribution systems where press or push-to-connect technology is preferred over solder or threaded connections. It is appropriate for new construction and retrofit applications on copper pipe runs. The 3/4 inch size is common in main branch supply lines serving fixtures, water heaters, and zone valves. The fitting is packaged individually and sold as a single unit, making it practical for service calls and small repair jobs alongside larger installations.

Key Features

• Push-to-connect press fitting eliminates soldering and open flame on the job
• Integral coupling stop ensures consistent pipe insertion depth
• Rated to 300 psi maximum working pressure
• Maximum working temperature of 250 degrees F (121 degrees C)
• Lead Free construction meets NSF-61/372 requirements for potable water contact
• Listed to IAPMO PS117 standard

Compatibility

Designed as an OEM-style press coupling for use with standard 3/4 inch copper pipe in residential and commercial potable water plumbing systems.

Installation Notes

Installation should be performed by a licensed plumber in accordance with local plumbing codes and the International Plumbing Code (IPC). Shut off the water supply and depressurize the line before cutting pipe or making connections. Pipe ends must be cut square, deburred, and cleaned before insertion into the push-to-connect fitting to ensure a proper seal. Do not exceed the rated working pressure or temperature limits for this fitting.