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The ASC ENGINEERED SOLUTIONS 300043007 is a black cast iron reducing tee designed for threaded pipe assemblies in drainage, waste, and vent (DWV) or low-pressure piping systems. It connects a 1-1/2 inch run with a 1-1/4 inch branch outlet, allowing a branch line of smaller diameter to tap into the main run without additional reducing couplings. Cast iron construction provides durability and resistance to wear in demanding mechanical environments. At 2.5 pounds, this domestically produced fitting meets the mass expectations typical of full-bodied cast iron pipe fittings. Licensed plumbers and pipefitters handle installation as part of rough-in or retrofit piping work.
This reducing tee is suited for residential and light commercial plumbing applications where a 1-1/2 inch main line requires a 1-1/4 inch branch connection. Common install scenarios include drain line assemblies, waste stack takeoffs, and branch connections in below-grade or in-wall piping. The black coating is standard for cast iron fittings used in gas and general-purpose piping where corrosion protection and identification are priorities.
Designed as an OEM-style replacement or new-installation fitting for threaded cast iron piping systems requiring a 1-1/2 inch by 1-1/4 inch by 1-1/2 inch reducing tee configuration.
Installation should be performed by a licensed plumber in accordance with applicable local plumbing codes and IPC requirements. Shut off and drain the affected piping section before removing any existing fittings. Use appropriate pipe thread sealant or PTFE tape on all male threads before assembly. Do not over-tighten threaded cast iron fittings, as the material can crack under excessive torque.
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