I’ll show you how to find and fix internal leaks on a Kohler toilet with a 3-inch Aquapiston canister flush valve.

Locate the leak 1:08
Part numbers for seals 2:32
Replace canister seal 2:38
Still leaking? Try this 5:49
Replace “flat seal” 7:28
Identify your Kohler toilet model 16:17
Find part numbers for your Kohler toilet 17:04
4-inch wrench for removing flush valve nut 23:25

Kohler Toilet Parts
Canister Seal p/n GP1059291 (fits 2” AND 3” flush canisters): https://amzn.to/2xLTdBw
Kohler “Flat Seal” p/n 1097686 (only fits 3” flush canister): https://amzn.to/2Jwh1jk
3” Toilet Canister Flush Valve Kit p/n 1083980 (Complete assembly): https://amzn.to/2LUCMLv

Permatex 22058 Dielectric Grease, 3 ounce tube: https://amzn.to/2Jw2p3t
(Vaseline also works)

Kohler Toilet Service Parts Book
online: http://kohler.dirxion.com/toiletservi...
download pdf: https://pz3.comcom.com/digital/viewab...

NEW flush valve wrenches (made from durable 1/4-inch thick HDPE):
https://www.ebay.com/itm/233627476190
*** LARGE Multi-sized Octagon wrench fits Kohler, Sterling, and American Standard toilets with 3-inch flush valves.
*** SMALL Multi-sized Octagon wrench fits Delta, Toto, Korky and Fluidmaster 3-inch flush valves.
*** 2.5-inch wrench for removing the valve nut on most two-piece toilets with 2-inch flush valves. It's especially useful for Kohler and Sterling toilets where the nut is recessed in the triangular gasket.