Fluidmaster 5403 Frequently Asked Questions Manual

** DO NOT USE IN-TANK DROP-IN TOILET BOWL CLEANERS CONTAINING BLEACH OR CHLORINE. USE OF SUCH
PRODUCTS WILL RESULT IN DAMAGE TO TANK COMPONENTS AND MAY CAUSE FLOODING AND PROPERTY
DAMAGE. USE OF SUCH PRODUCTS WILL VOID THIS WARRANTY. Instead, we recommend using
automatic toilet bowl cleaner.
Frequently Asked Questions
How is the 5403 flapper different than 5401'3 flapper?
1. The 5401 is a direct replacement for both the Glacier Bay and American Standard models that are
equipped with a 540 Flapper and flush system.
2. The 5403 is a universal replacement for most 3 inch flapper and flush systems including Glacier
Bay and American Standard.
3. The 5403 comes with on additional adjustment for the hinge, it allows the flapper to attach to
wider 3 inch systems that are not Glacier Bay and American Standard.
What is the difference between solid frame and flexible frame flappers? Does one have more advantages than the
other?
1. A solid frame is sturdy and does not allow the flapper ball to twist or mis-align with the drain
seat. It center punches the drain every time for a perfect seal.
2. The all flexible flappers are great to use when you have an over sized 2 inch flush valve which
does not allow a solid frame to fit (it may stick on the drain and not close).
3. The flexible flapper comes equipped with an overflow pipe adaptor which allows you to connect
the flapper to the drain when it does not have mounting pins for a flapper to attach to.
What size flapper do I need?
Fluidmaster manufactures a universal 2" flapper and a universal 3" flapper. To determine the size of flapper you
need, measure the drain hole the flapper covers, if the hole is 2.5 inches use a 2 inch flapper and if the drain hole is
3.5 inches use a 3 inch flapper. To learn more what how to determine what size flapper you need, please click
here: Measure Size of Flapper
Determining Whether You Have a 2" or 3" Flush Valve and Flapper
One of the biggest challenge to finding the right flapper for your toilet is to determine which size of flapper will fit
your toilet. Most toilets will have a 2-inch drain or a 3-inch drain. Fluidmaster manufactures a standard or universal
size of flush valves with flappers and are among the most common flush valves to be used. All though there are
many different types of flush valves most flush valves are interchangeable and depend on the size of the ceramic
flush hole that is bored through the tank by the porcelain manufacturer.
Fluidmaster's Flush Valves use flappers to connect to the flush valve and can be easily replaced by snapping them
off and on to the flush valve. These flappers are labeled as 2 inch or 3 inch for their corresponding flush valve size
to make it easier for you to select the correct flapper.
The simplest way to determine which Fluidmaster flush valve and flapper to use is to measure the flapper that is
already on the flush valve. To identify what size is needed measure the width of the flapper from end to end. If the
flapper measures 3 inches across select a 2 inch flapper (like the 502 Fluidmaster model) if the flapper measures 4
inches across select a 3 inch flapper (like the 5403 Fluidmaster model).
Flush 'n Sparkle®