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The IPEX 193604 is a 4-inch PVC DWV closet flange with a knockout, designed for use in drain, waste, and vent systems. This one-piece hub-style fitting connects a toilet to the drainpipe below the finished floor and provides a stable mounting surface for the toilet base. Constructed from foamcore PVC, it is lightweight and suitable for residential drain applications. The knockout design allows flexibility during rough-in, letting the installer choose whether to remove the knockout for a direct pipe connection or leave it in place. Licensed plumbers install this fitting as part of standard toilet rough-in work.
This closet flange is intended for residential DWV applications where a 4-inch PVC drain line terminates at a toilet installation. It is used during new construction rough-in or as a replacement fitting when an existing flange is cracked, damaged, or improperly positioned. The hub inlet accepts standard 4-inch PVC pipe. This fitting is not pressure rated and is intended strictly for gravity-flow drain and vent systems.
Designed as an OEM-style DWV replacement or new-construction closet flange for 4-inch PVC drain systems in residential plumbing applications.
Installation should be performed by a licensed plumber in accordance with applicable local plumbing codes and the International Plumbing Code (IPC). Shut off the water supply and clear the drain line before beginning work. Use approved PVC primer and solvent cement when making the hub connection to the drain pipe. Ensure the flange ring sits flush with or slightly above the finished floor surface to allow a proper wax ring seal at the toilet base.
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