Kohler K-87998 Toilet Flush Valve Kit

[This review was collected as part of a promotion.] I have three Kohler toilets in my house and they have been working efficiently for over 15 years. But it was time to replace the flush valve and flapper as they were encrusted with hard-water scale. I replaced all three flush valves in a little over an hour. The instructions were simple to follow and the work went easily. All three are working flawlessly since I replaced them about a month ago. I saved a ton of money over having a plumber replace all three.