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The MUELLER STREAMLINE PDWV4853-KO-3OR4IN is a PVC DWV closet flange designed to connect a toilet to the drain-waste-vent system in residential and light commercial plumbing installations. This fitting accepts a 4-inch hub-by-hub connection and provides the mounting surface for the toilet bowl wax ring and closet bolts. It is manufactured from PVC, making it lightweight, corrosion-resistant, and compatible with standard solvent-cement joining methods. Licensed plumbers and experienced trade installers handle this fitting during new rough-in work or toilet replacement projects where the existing flange is damaged or needs upgrading.
This closet flange is suited for use in residential bathrooms, guest baths, and light commercial restrooms where a 4-inch DWV drain line terminates at the floor. It installs at floor level and is designed to sit flush with or slightly above the finished floor surface to allow a proper wax ring seal. The hub-by-hub design allows the fitting to receive a 4-inch PVC pipe from below while providing the correct collar diameter for standard toilet bases.
Designed as an OEM-style replacement or new-installation fitting for 4-inch PVC DWV drain systems in residential and light commercial plumbing applications.
Installation should be performed by a licensed plumber in accordance with local plumbing codes and the International Plumbing Code (IPC). Shut off the water supply and remove all water from the drain line before beginning work. Solvent-cement joints are permanent once cured — dry-fit all components and verify alignment before applying primer and cement. The flange should be positioned so the top collar sits at or slightly above the finished floor level to ensure a proper wax ring seal.
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