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The OATEY COMPANY 43509 is a PVC inside-fit closet flange designed for connecting a toilet to a 3-inch Schedule 40 DWV drain line. This flange fits inside a 3-inch Schedule 40 PVC DWV pipe, creating a secure, watertight seat for toilet installation. It ships without a test cap, making it suited for direct installation rather than pre-inspection pressure testing. Four mounting slots are evenly spaced around the ring to allow flexible toilet bolt positioning and proper alignment during rough-in. Licensed plumbers typically select this fitting during new construction or toilet replacement work where the existing drain terminates in 3-inch Schedule 40 PVC pipe.
This fitting is intended for residential and light commercial plumbing applications where a 3-inch DWV drain stack or branch line exits the subfloor. The inside-fit design seats directly inside the pipe end, eliminating the need for a separate coupling or transition fitting. The four mounting slots give installers flexibility when positioning toilet hold-down bolts on concrete, wood, or other subfloor surfaces. It is sold individually, though packaging quantities of 12 units per case are available for contractors stocking multiple job sites.
Designed as an inside-fit replacement or new-installation closet flange for 3-inch Schedule 40 DWV PVC pipe systems in residential and light commercial drain, waste, and vent applications.
Installation should be performed by a licensed plumber in accordance with the International Plumbing Code (IPC) and applicable local amendments. Shut off the water supply and remove any standing water from the drain line before beginning work. Solvent-weld the flange to the pipe using PVC primer and cement rated for DWV applications, and allow adequate cure time before setting the toilet. Do not over-torque toilet hold-down bolts, as excessive force can crack the flange ring.
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