A Y Mcdonald Aym-711x3fe 3/4 Dual Check Valve 3/4 in

Product Description

The A Y McDonald aym-711x3fe 3/4 is a dual check valve designed for potable water and plumbing backflow prevention applications. Dual check valves use two independently operating spring-loaded check elements in series to prevent reverse flow of water back into the supply line. This configuration provides a redundant seal, reducing the risk of contamination from back-siphonage or backpressure. The 3/4 inch port size suits residential and light commercial service lines. Licensed plumbers install this type of valve in compliance with local plumbing codes where backflow protection is required on water service entries or appliance connections.

This dual check valve is suited for residential and light commercial plumbing systems where a 3/4 inch connection is standard. Typical applications include protection on water heater inlets, boiler makeup lines, irrigation connections, and similar low-hazard cross-connection control points. It is installed inline on a water supply line and requires no external power or actuation. A Y McDonald manufactures plumbing brass and flow-control components for professional trade installation.

Key Features

• Dual check design provides two independent check elements for redundant backflow protection
• 3/4 inch port size fits standard residential and light commercial supply lines
• Spring-loaded check elements operate automatically without external power
• Compact inline form factor suited for tight plumbing installations
• Manufactured by A Y McDonald, a recognized plumbing brass supplier

Compatibility

Designed as an OEM-style inline dual check valve for 3/4 inch potable water plumbing systems in residential and light commercial applications.

Installation Notes

Installation should be performed by a licensed plumber in accordance with the applicable edition of the International Plumbing Code or local jurisdiction requirements. Shut off the main water supply and relieve line pressure before removing any existing valve or fitting. Ensure correct flow-direction orientation as marked on the valve body before making final connections. Verify local code acceptance of dual check valves for the specific cross-connection hazard classification before installation.

Technical Specifications

• Port Size: 3/4 inches
• Valve Type: Dual Check
• Carton Weight: 1.025 pounds

Standard Information

• Brand: A Y McDonald
• Manufacturer Part Number: aym-711x3fe 3/4