A.y. Mcdonald 5421-359 Bronze Check Valve 3/4 in Fpt

Product Description

The A.Y. MCDONALD 5421-359 is a 3/4-inch inline bronze check valve designed to prevent backflow in potable water and general plumbing systems. Built with lead free bronze construction, this valve meets lead free compliance requirements for use in drinking water applications. It uses female pipe thread (FPT) connections on both ends for straightforward inline installation. Weighing 0.62 pounds, it is a compact, durable component suited for residential and light commercial plumbing work installed by licensed plumbers.

This check valve is intended for inline installation in 3/4-inch piping systems where one-directional flow control is required. Typical applications include potable water supply lines, water service entry points, and plumbing circuits where backflow prevention is needed. Its bronze body provides corrosion resistance in wet service environments. The FPT connection type makes it compatible with standard threaded pipe installations common in both new construction and retrofit plumbing projects.

Key Features

• Lead free bronze construction meets requirements for potable water service
• 3/4-inch FPT connections on both ends for inline threaded pipe installation
• Inline check valve design allows flow in one direction and prevents backflow
• Compact form factor at 0.62 pounds for easy handling in tight spaces
• Bronze body provides corrosion resistance for long-term wet service reliability

Compatibility

Designed as an OEM-style replacement or new-installation check valve for 3/4-inch threaded plumbing systems requiring lead free, inline backflow prevention.

Installation Notes

Installation should be performed by a licensed plumber in accordance with local plumbing codes and the International Plumbing Code (IPC). Shut off water supply and relieve system pressure before removing or installing the valve. Apply appropriate thread sealant or PTFE tape to FPT connections and tighten to hand-snug plus wrench-tight — do not overtighten bronze fittings. Verify flow direction arrow or valve orientation before completing the installation.

Technical Specifications

• Size: 3/4 inches
• Connection Type: FPT (Female Pipe Thread)
• Material: Bronze
• Type: Inline Check Valve
• Lead Free: Yes
• Weight: 0.62 pounds

Standard Information

• Brand: A.Y. MCDONALD
• Manufacturer Part Number: 5421-359