What do you measure to figure out if yo need a 2" or 3" flapper for your toilet tank?
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You will measure the inside diameter of the hole that the flapper is covering. Flapper sizes are unique in that a 2" flapper, will cover a 2 1/2" - 3" hole. Whereas 3" flappers will cover 3 1/2" - 4" holes. If you have any questions about this, contact Fluidmaster’s Technical Service Department for help with your product. We are available Monday through Friday from 5:30 AM through 5:00 PM Pacific Standard Time. Contact options include: Chat www.fluidmaster.com/support E-Mail techsupport@fluidmaster.com and Toll Free 800-631-2011.
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