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The A Y MCDONALD aym-72008 1/2 is a no-lead boiler drain valve designed for low-pressure hydronic and plumbing systems in residential and commercial applications. Built from heavy-duty no-lead brass with brass trim, a rubber gland, and seat packing, it provides a positive shutoff with a 1/2 inch MNPT inlet and garden hose thread outlet. Rated at 125 psi for water service, the valve measures 1.46 inches from inlet to outlet and 3.5 inches from top to inlet center. Licensed plumbers and HVAC service technicians install this type of valve as a serviceable drain point on boilers, water heaters, and low-pressure piping systems.
This boiler drain valve is suited for residential and light commercial hydronic heating systems, potable water supply lines, and general plumbing drain applications where a reliable shutoff and hose-thread connection are required. The MNPT x garden hose thread configuration allows direct connection to a standard drain hose for system flushing, draining, or maintenance. Its no-lead brass construction meets regulatory requirements for use in systems that may contact potable water.
Designed as an OEM-style replacement or new-installation boiler drain valve for residential and commercial low-pressure water piping and hydronic heating systems with 1/2 inch MNPT connections.
Installation is performed by a licensed plumber or qualified HVAC technician. Shut off water supply and relieve system pressure before removing or installing any drain valve. Apply thread sealant tape or pipe dope to male NPT threads per local plumbing code requirements, referencing IPC standards as applicable. Do not exceed the 125 psi rated working pressure for this valve.
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