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The ASC Engineered Solutions 306059403 is a flanged concentric reducer designed for industrial and commercial piping systems where a controlled, centered transition between pipe sizes is required. Sized at 4 inches by 2.5 inches, this fitting reduces flow diameter symmetrically along the pipe centerline, which helps maintain flow alignment and minimizes turbulence at the transition point. Constructed from cast iron with a black coating, the 306059403 offers the durability and pressure integrity expected in Class 125 flanged piping assemblies. At 31 pounds, this is a heavy-duty fitting intended for permanent, bolted installations. Licensed pipefitters and plumbers working on commercial or industrial systems are the primary installers.
This concentric reducer is suited for use in commercial and industrial piping systems that require flanged connections at Class 125 pressure ratings. Typical applications include water distribution, process piping, and mechanical room installations where a 4-inch line must transition down to a 2.5-inch line while preserving centerline alignment. The flanged ends allow for bolted assembly directly to mating Class 125 flanged components, making this fitting appropriate for systems that require periodic disassembly or inspection access.
Designed as an OEM-style replacement or new-installation fitting for Class 125 flanged cast iron piping systems requiring a concentric 4-inch by 2.5-inch reducer.
Installation should be performed by a licensed pipefitter or plumber in accordance with applicable mechanical and plumbing codes. Isolate and depressurize the piping system completely before removing any existing fittings or installing this reducer. Use properly rated gaskets and bolts rated for Class 125 flanged service, and torque fasteners evenly in a cross pattern to ensure a uniform flange face seal. At 31 pounds, use appropriate lifting and handling practices to avoid injury during positioning.
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