The bump is most likely not necessary for a good seal. Bumps like that are usually location devices for assembly (at the factory or on site). There’s probably a corresponding dimple or slot on the hard parts of the toilet. They allow for quicker and more accurate manufacturing.

Are all flush valve seals the same size?

An easy reference is to look at the size of the flush valve drain opening in the bottom of the tank. If it’s about the size of an orange or baseball, you need a 2 inch seal. If it looks more like the size of a grapefruit or softball, you need a jumbo 3 inch seal.

Are flush valves interchangeable?





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.

How do you install a flush valve seal?

Fortunately, in just a few minutes of your time, you can fix your toilet, and reestablish order.

  1. Drain the Toilet Tank. …
  2. Disconnect the Refill Tube. …
  3. Remove the Flush Valve Assembly. …
  4. Replace the Flush Valve Seal. …
  5. Reinstall the Flush Valve Assembly. …
  6. Check the Install.


Does flush valve size matter?

Having a larger flush valve means getting the water into the bowl and down the drain more quickly. The difference in flushing power between a 2-inch and a 3-inch flush valve can be substantial, and the larger valve can produce a better flush with much less water.

Are toilet flush valves universal?





No. Toilet flush valves come in a variety of sizes, and there are also several types, including standard, tower- or canister-style, and dual flush valve.

How do I know what size flush valve I have?

Look at the flush valve drain opening at the bottom of your tank.

  1. If the opening looks about the size of a baseball or orange, you need a 2″ flapper.
  2. If the opening looks about the size of a softball or grapefruit, you need a 3″ flapper.


Are all toilet syphons the same?

They really actually all do the same job but operate slightly different. Most toilets are the same so it is just the mechanism’s that are different. The part of the toilet that stores the water is called the cistern and these will have in generally a 2” opening at the bottom to which the 1 ½” siphon sits into.

How do you fix a toilet flush valve seal?



Quote from the video:
Quote from Youtube video: With your fingers grip the edge of the red seal and pull it from the valve body in this manner. Here's a close-up of the groove where the seal. Was seated next remove the new seal from its package.

How can you reduce the volume of water in a flush?

Since the average person flushes five times a day, the gallons can really add up. Put a plastic bottle filled with water in your toilet tank to reduce the amount of water used per flush (if you can’t replace your higher volume toilet).

What is the difference between a 2 inch and 3 inch flush valve?

Quote from the video:
Quote from Youtube video: This will measures three inches. So that's quite a bit more as far as how much water it lets through or how quickly the water comes through show that show a little comparison. We're gonna do is set

Are toilet flush valves standard size?



2 inches

Standard and other sizes of flush valves



The standard size of a flush valve is 2 inches. This size is what you’ll likely find at a home improvement store and should work on most toilets, including low-flow and older models with larger tanks.

Are all toilet fill valves the same?

There are several different types of fill valves commonly found in toilets, and you will need to be able to identify your type in order to make adjustments or replacements to yours. Some types of fill valves use older technologies and are best replaced with a newer type when repairs are called for.

Which brand is better korky or Fluidmaster?

The Korky gasket material is nice and spongy, yet sturdy – the quality feels better to me than the Fluidmaster. As with replacement flush valves, there’s more than one size of gasket available. 2 inch is by far the most common, with some newer toilets using 3 inch valves.



Fluidmaster Model 6102 2″
Korky Model 481BP 3″

How often do toilet fill valves need to be replaced?



about five years

Toilet fill valves last about five years, sometimes longer, depending on the quality of the valve, how often the toilet is flushed, and the quality of a home’s water supply. Like any valve constantly exposed to water, eventually a fill valve can clog or leak.

Is Fluidmaster a good brand?

Our pick for the best toilet fill valve is the Fluidmaster 400AH PerforMAX Universal High Performance Toilet Fill Valve. We love that it conserves water and adjusts from 10-15 inches so it will work with almost any toilet. Plus, it’s priced affordably and covered by a seven-year warranty.

How long should a Fluidmaster last?

A: Most of Fluidmaster’s fill valves, flappers and flush valves have 5-7 year warranty and typically last beyond these years when not exposed to the harmful effects of drop-in bleach tablets. Drop-in bleach tablets can degrade these toilet parts so they do not function properly (e.g., seal leaks) within a year or two.

Is Fluidmaster 400 same as 400A?



The Fluidmaster 400a and 400h are very similar pumps. The main difference is that the 400h is designed for larger toilet bowls than the 400a.

What is the difference between Fluidmaster 400H and 400A?

What is the difference between the 400A and 400H toilet fill valves? The 400A is a standard refill valve that controls the water in the tank, it controls fill time and water level. The 400H is a performance fill valve that also controls the water in the tank.

Why is my toilet making a hissing sound?

A hissing sound can mean that the refill valve is still letting a tiny bit of water into the tank because it hasn’t shut off like it’s designed to. The valve shuts off automatically based on the water level in the tank. A faulty valve or one not set properly will keep running.

Why is my toilet tank filling slowly?

If your toilet is slow to fill, it might be due to one of four reasons: a clogged vent, a clogged drain, faulty plumbing, or a blocked pipe. 1. A clogged vent. If your vent is clogged, the air won’t be able to escape from the tank, and the water will take longer to fill up.