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The ASC Engineered Solutions D.GU is a 1/2 inch nominal, 150 lb rated malleable iron pipe union with a galvanized finish and threaded end style. Unions allow piping systems to be disconnected and reconnected without cutting pipe, making them essential for maintenance access points in gas, water, and steam distribution lines. The galvanized coating provides corrosion resistance in wet or outdoor environments. This fitting is domestically manufactured and suited for use by licensed plumbers, pipefitters, and HVAC technicians working on low-pressure piping systems.
This union is designed for 1/2 inch nominal threaded pipe in residential and light commercial applications. Typical installations include gas supply lines, domestic water distribution, hydronic heating systems, and general industrial piping where a break-apart connection is required. The 150 lb pressure class makes it appropriate for standard service conditions in both above-ground and concealed piping runs.
Designed as an OEM-style threaded union for 1/2 inch nominal malleable iron piping systems rated at 150 lb service class.
Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local codes and the International Plumbing Code or International Fuel Gas Code as relevant. Shut off and depressurize the piping system completely before disassembling or installing any union fitting. Apply appropriate thread sealant or PTFE tape to male threads before assembly. Do not overtighten the union nut by mechanical means, as malleable iron fittings are susceptible to cracking under excessive torque.
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