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Old 03-23-2020, 12:45 AM   #1
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Default Sharkfin flapper

This was one from the other day. I replaced the flapper and it wouldn’t flush right. If you tripped the handle quickly like normal it would do a quarter flush because the flapper would shut too quick. I tried adjusting the chain too almost too tight. Then I tried switching the hook to all the different holes on the handle to try and get a different angle to flip the flapper properly. I finally noticed the top of the sharkfin was hitting the flush valve causing it to bounce back down. I cut off the tip of the flapper and it works normal. What’s the reason for the sharkfin anyway?
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Old 03-23-2020, 05:46 AM   #2
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Quote:
What’s the reason for the sharkfin anyway?
Choose your answer:

A. So some engineer could justify his job, based on some theoretical water flow, restriction or turbulence formula.
B. Because it looks cool as a selling point on the package.
C. To help plumbers practice their ability to be resourceful, and find a work around for another useless product feature.
D. All of the above.
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Old 03-23-2020, 06:50 AM   #3
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My bet looking at the original which has the fin too is to prevent it from being stuck in the full open position after the flush is complete.
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Old 03-23-2020, 06:50 AM   #4
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Quote:
Originally Posted by Debo22 View Post
..........What’s the reason for the sharkfin anyway?



It's there to limit the travel of the flapper and thus the flow.




One piece toilets are pretty much all garbage.













.
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Old 03-23-2020, 06:54 AM   #5
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My bet looking at the original which has the fin too is to prevent it from being stuck in the full open position after the flush is complete.



Morning!
















.
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Old 03-23-2020, 08:56 PM   #6
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It’s there to test your ability as a plumber..
I’ve seen a few of them, they only seem to work in said toilet they come out of...
Other then that I cut the fin off and make “Flapper Fin Soup” which is illegal in most of North America.
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Old 03-24-2020, 04:03 AM   #7
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Quote:
Originally Posted by Tango View Post
My bet looking at the original which has the fin too is to prevent it from being stuck in the full open position after the flush is complete.

Typical engineer's solution: We'll make sure it doesn't get stuck fully open by designing it so that it doesn't fully open. Brilliant!

Does it work like it should? That's irrelevant, just so long as no one can say that our flapper gets stick fully open!
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Old 03-24-2020, 06:15 PM   #8
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Default Cut off

I usually end up cutting them off.
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Old 03-26-2020, 02:33 AM   #9
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Have you noticed that Kohler is constantly changing their flapper designs? Not that the newest one is better than the previous flapper.
My theory is that they keep ahead of the patent expiration, so you have to buy a replacement from Kohler.
I have to carry at least 6 different flappers for Kohler toilets, not counting the Canister seal.
1 for Toto, 1 for Gerber.
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Old 03-26-2020, 07:56 AM   #10
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Have you noticed that Kohler is constantly changing their flapper designs? Not that the newest one is better than the previous flapper.
My theory is that they keep ahead of the patent expiration, so you have to buy a replacement from Kohler.
I have to carry at least 6 different flappers for Kohler toilets, not counting the Canister seal.
1 for Toto, 1 for Gerber.
kolher SUCKS...thats why...
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