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The ASC Engineered Solutions 310543004 is a black malleable iron reducing coupling designed to connect female pipe thread (FPT) ends of two different diameters in threaded piping systems. Built to Extra Heavy (XH) strength classification, this reducer handles demanding pressure conditions in commercial and industrial plumbing and gas distribution applications. It transitions from a 1-inch female thread on one end to a 1/4-inch female thread on the other. Dimensional and pressure rating compliance follows ASME B16.3, with threads cut to ASME B1.20.1 standards. The part weighs 0.66 pounds. Licensed plumbers and pipefitters are the primary installers of this fitting.
This reducer is suited for residential and commercial plumbing, fire protection, and gas piping installations where a threaded reduction from 1 inch to 1/4 inch is required. The black finish indicates suitability for gas line and industrial applications. The UL and FM listings make it appropriate for fire protection and hazardous-location piping systems where listed components are required by code. The malleable iron construction handles the mechanical stress common in vibration-prone or high-cycle threaded assemblies.
Designed as an OEM-style threaded reducer for use in standard NPT-threaded malleable iron pipe systems requiring a 1-inch to 1/4-inch FPT reduction in plumbing, gas, and fire protection piping.
Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local codes and ASME B16.3 requirements. Shut off and depressurize the piping system completely before disassembling any threaded connection. Apply appropriate thread sealant or PTFE tape to the male threads being engaged into this fitting. Do not over-torque the connection, as malleable iron threads can crack under excessive force.
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