Watts Brass Tubular 3501-1012 Quick Connect Cts Mpt Adapter

Product Description

The WATTS BRASS TUBULAR 3501-1012 is a quick connect adapter designed to transition from 1/2 inch Copper Tube Size (CTS) to 3/4 inch Male Pipe Thread (MPT). It is a single-piece fitting with no loose parts to assemble or misplace, which reduces the chance of installation errors. Rated to 250 psi, this adapter is built for reliable performance in pressurized water supply systems. It carries NSF-14, NSF-61, CSA/ASTM, and UPC certifications, making it code-approved for concealed behind-wall installations and direct in-ground burial without requiring an access panel. Plumbers and pipefitters working on residential and light commercial water distribution systems are the primary installers of this fitting.

This adapter is suited for use in potable water supply lines where a CTS-to-MPT transition is needed. Its code-approved status for behind-wall and direct burial applications makes it particularly useful in new construction roughing and remodel work where access after installation is limited or not practical. Each package contains 5 pieces, making it convenient for jobs requiring multiple connections. The fitting is listed as a replacement for Qest and Flare It type fittings, allowing techs to swap out legacy connections without reworking the surrounding pipe layout.

Key Features

• Single-piece quick connect design — no separate parts to assemble or lose on the job
• Rated to 250 psi for reliable service in pressurized potable water systems
• Code-approved for behind-wall without access and direct in-ground burial installations
• NSF-14 and NSF-61 certified for use in potable water applications
• CSA/ASTM and UPC listed and approved
• Compatible replacement for Qest and Flare It type fittings

Compatibility

Listed as a direct replacement for Qest and Flare It type fittings. Designed for use in 1/2 inch CTS to 3/4 inch MPT transition applications in potable water supply systems where quick connect fittings are specified.

Installation Notes

This fitting is installed by licensed plumbers following applicable local plumbing codes and IPC guidelines. Shut off the water supply and depressurize the line before making any connection. No soldering or flaring tools are required for the quick connect end, but confirm the CTS tubing is cut cleanly and deburred before insertion. Verify that burial or behind-wall installations meet local code requirements for depth and bedding material when applicable.