

Ships same day if ordered by 12 pm
Manufacturer pricing rules prevent us from advertising our discount — no account or email required to see it.
Secure Payments
Easy Returns
Expert Advice
Fast Shipping
The FLUIDMASTER INC 513A-016-P4 is a 3-inch universal toilet tank flapper designed to replace worn or leaking flappers on a wide range of residential toilets. The flapper uses a durable silicone seal for long service life and consistent flush performance. An adjustable dial on the flapper body lets technicians or plumbers fine-tune water volume per flush to match the toilet's rated flow. The solid frame holds the seal firmly against the flush valve seat, reducing the risk of ghost flushing or incomplete seals. This listing is sold as a package of four units.
This flapper is suited for toilets equipped with a 3-inch flush valve, including high-efficiency toilet models rated at 1.28 gallons per flush (HET) and standard 1.6 GPF models. It is appropriate for residential toilet service work performed by licensed plumbers or experienced maintenance technicians. The adjustable flow dial makes it a practical choice when servicing multiple toilet brands across a single property or job site.
Designed to fit toilets with a 3-inch flush valve, including 1.28 HET and 1.6 GPF models from Mansfield, Toto, American Standard, Kohler, Glacier Bay, Gerber, and other brands using a standard 3-inch valve seat.
Shut off the toilet supply valve and flush to drain the tank before removing the old flapper. This work falls within the scope of a licensed plumber or qualified maintenance technician. Inspect the flush valve seat for pitting or mineral buildup before seating the new flapper, as a damaged seat will prevent a proper seal regardless of flapper condition. Follow all applicable local plumbing codes during installation.
Thanks for subscribing!
This email has been registered!