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The ASC Engineered Solutions 812509008 is a black malleable iron union designed for threaded pipe assemblies in plumbing, HVAC, and industrial piping systems. Sized at 1-1/2 inches, this union allows sections of threaded pipe to be connected or disconnected without rotating the pipe itself, making it a standard component in maintenance-accessible piping runs. The black coating provides basic corrosion resistance suitable for dry or low-moisture interior environments. Licensed plumbers and pipefitters install this fitting in gas, water, and steam distribution lines where serviceability is required.
This union is well-suited for residential and light commercial applications, including gas supply lines, hydronic heating loops, and general-purpose black iron pipe systems. It is commonly used where periodic disconnection of a piping segment is anticipated, such as near equipment connections, shutoff valve assemblies, or where future servicing of downstream components is expected. The 1-1/2 inch size fits standard Schedule 40 black iron pipe of matching nominal diameter.
Designed as an OEM-style replacement or new-installation union for 1-1/2 inch nominal black iron threaded pipe systems in plumbing, HVAC, and gas distribution applications.
Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local codes, the International Plumbing Code, or the International Fuel Gas Code as appropriate to the service type. Shut off gas or water supply and relieve system pressure before removing or installing any union. Apply appropriate thread sealant rated for the intended service medium to all male threads before assembly. Do not over-tighten the union nut, as malleable iron threads can be damaged by excessive torque applied without a torque specification.
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