Replace Toilet Flapper - Toilet Flapper Sizes

When you are replacing a toilet flapper, you need to know whether it is a 2 inch or 3 inch flapper. The 1.6 and 1.28 toilets have a 3 inch flush valve.There is no longer a universal toilet flap, even though you may still see it marked on the packaging.

[DanielBrownsan]

Clear and concise and WAAAYYY more useful than that Korky video that used tennis balls and grapefruits as units of measurement (poorly). Mine seems to be an oddball; the opening to the bowl is 2.5 inches which seems to match NOTHING out there (despite the toilet, ironically, being manufactured by "Standard". Is it like 2x4s where they're not actually that size?

[elizabethmallory]

I appreciate this video. I assumed there was a universal flap. Now I know to measure before I head to the hardware store! Saved me time and money

[ProperSkill]

Thanks for the simple short video. No BS like all these other full blown producers trying to make a directors career on youtube these days.

[ProperSkill]

Thank you for not begging me to like, subscribe, and go to the link. Thats gross when people do that.

[demelzapoldark]

This is WAY BETTER than the 'Korky' brand flapper video. They tell you to compare your flapper to a grapefruit or orange or use a tennis ball or something else instead of using a tape measure and telling you WHAT to measure. THANK YOU!

[DougHinVA]

He is right. I bought the smaller one and found it didn't fit my bathroom toilet (too small for it), but is a fit for the back bedroom 1/2 bath flapper. So I needed the 3" size and it just drops in. Adjust the setting on it to flush completely with the minimum amount of water. Do it yourself and maybe needle nose pliers to get the pull-chain length adjusted.

[JaegerOmega]

Thanks! I was trying to figure out if I needed to measure the flapper or the pipe!

[dandcarter]

All are 2 inch or 3 inch... except for those that are 4 inch. Which includes, at the least, the American Standard Champion series. Can't just grab the lareger or smaller these days. Need to pay attention to the sizing.

[eddy]

Take the old one off and bring it with you 👍🏻

[lcozzarelli]

I currently have a 2 inch flapper that is recommended for my American Standard Cadet 2100 toilet but the tank noisily refills for three seconds every 15minutes because the 2 inch flapper isn’t *quite* big enough and is causing a slow leak. I measured the flush valve, and it’s 2.5 inches.... I’m wondering if the 3 inch flapper would be too big, or if I should get another brand of 2 inch flapper?

[larry]

Would be helpful if you said what and where to measure. Actually showing it being measured would be even better. Think of the guy that needs tires - all tires are round but getting the universal or standard tire won’t fit every car and knowing how And where to measure makes all the difference in picking the correct size.

[natewoodard]

Have you ever seen ones greater than 3"? I have a Project Source toilet purchased from Lowes within the past 5 years and just noticed it has been leaking (whole tank emptied overnight with water shutoff--tons of wasted water per month!). The diameter of the hole is definitely greater than 3" and looks to be around 3.25". I can't find that size from a quick search.

[irrichcunanan]

i wish i saw this vid earlier...went to hardware store...saw universal flapper...tried at home..whoops to small.

[presouz]

I have a pre-1990 toilet and somebody replaced the flapper valve with a tower and it is a 3.5 gallon flush but it only will flush a gallon and a half. I don’t get it I don’t know how to fix it.

[jvickers]

Great video! Unfortunately my toilet doesn't seem to have that type of flapper? It looks like the type next to you left hand. When I flush, that whole unit goes up. What is that type called? Would I need a pro to replace that type? Thanks.

[stringtheory-zi]

HELP! I have the one on the far right where the flap is the entire plastic casing. What's this part called (make/model/serial#) so I can get a new one. It's so frustrating see everything on the internet like the two on the left.

[chugg]

The American standard toilet I bought says it is a four-inch flush valve. is there a flapper type valve for it?

[The_Red_Pill__]

My problem is that the tube is not that round tube you show here, it is square and about 2" wide and is pretty close to the hole, so i'm having trouble finding a flapper with rubber arms that are wide enough and far enough apart. The arms i find are too long and/or too close together. please help!

[carloscano]

mine measures 2 5/8" what size should I buy?

[moreonwoodworking]

Why not just take the worn out flap to the hardware store?