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The ASC Engineered Solutions E.NU is a 3/4-inch malleable iron pipe union rated at 150 lb, featuring a brass-to-iron seat configuration and a galvanized finish. Unions allow piping systems to be disconnected and reconnected without cutting or threading new pipe, making them essential for servicing pumps, valves, water heaters, and other inline equipment. The galvanized coating provides corrosion resistance in moisture-prone environments. This is a domestically produced fitting, suited for plumbing, HVAC hydronic piping, and general industrial piping where a 150 lb pressure class is appropriate.
This union is designed for use in residential and light commercial piping systems. Typical applications include gas distribution lines, hot and cold water supply, steam and condensate return, and hydronic heating circuits where routine equipment removal is anticipated. The brass seat mates against the iron seat to create a reliable, leak-resistant seal without the need for additional gaskets. Licensed plumbers and pipefitters install this fitting in accordance with applicable codes such as the IPC and IFGC.
Designed as an OEM-style replacement and standard-service fitting for 3/4-inch NPT threaded malleable iron piping systems rated at 150 lb pressure class.
Installation should be performed by a licensed plumber or pipefitter following applicable local and national plumbing codes. Shut off the water or gas supply and depressurize the system completely before disassembling any union. Apply appropriate thread sealant or PTFE tape to all NPT threaded connections before assembly. Do not over-tighten the union nut, as malleable iron fittings can crack under excessive torque.
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