C-100500-K C-100500-Kit Replacement Cartridge Kit Flush Valve Cartridge Assembly Kit Compatible with m-101526-f3 503 504 Cartridge, White, 1 Pack

I just followed the manual so RTFM (read the factory manual) after a few turns and tries the toilet stopped running. pretty much you start screwing the valve into the flushometer, then you open the toilet shut off and keep turning the valve until it pressurizes. I has to do it like 2 times to get it to work and now the toilet works normal. I'm going to check how long it takes until this needs to be replaced but good product overall

Edit: As karma would have it, the day after I write this review, the cartridge has issues and water is flooding through and over it causing a leak under my toilet. Had to shut the water off and decided to re-order the official OEM part. So much for this experiment, and outside my return window. My flushmate was having issues where after flushing, the water refill wouldn't stop until I fidgeted around w/ the cartridge. Eventually started looking around for a replacement cartridge. Looking at the manufacturer's website, it was fairly pricey so off to Amazon to search for an alternative when I ran into this. Was priced better so I gave it a shot. Installation was straight forward just following the instructions. You use the end of your pliers to tighten it as instructed until you stopped hearing the water filling. All worked well for about 2-3 weeks when the problem started happening again. Again, the water would only stop after fidgeting with the cartridge. Luckly it happened in less than a month where I had the opportunity to file a replacement with Amazon. Replaced the replacement and everything has been working for the past few months so this is great. Again, just lucky enough I was able to get the replacement replaced within the right amount of time, which is why I docked 1 star. Otherwise, I would recommend this replacement cartridge over the official one.

Worked perfectly to get our flush mate working again. Includes all parts needed to fix 90% of plumbing issues with these pressurized toilet systems. I consider the excellent printed instructions to be a nice bonus. Installation took less than 15 minutes.

When you install this, you can NOT just screw it in all the way. Water drainage won't stop if you do that. You have to run the water in, then, as the water keep running, you start screw this filter in. When you screw in about the righ height. Start screw in 90 degrees, then watch the water if it stops, if not, screw in additional 90 degrees again, then check the water to see if it stops. At a certain point, the water will completely stop. You have to find that point.

Easy replacement and quick fix for cartridge that was no longer shutting off. Comes with illustrated instructions, replacement filter screen and replacement duck-bill air inducer. Too soon to evaluate durability, but worked perfectly upon installation. Tip: Invest in a Flushmate Cartridge Wrench. Coupled with a 3/8" ratchet, the specialty wrench makes cartridge removal, reinstallation and fine tuning for proper shutoff a breeze.

I bought this because it was cheaper that the original replacement part. Cheap being the operative word! I installed it, following the instructions exactly. The instructions were actually very good. It worked great at first and then, a few days later it started leaking out of the top of the stem. Apparently, the cheap rubber diaphragm had ruptured. Fortunately, I noticed the water running and shut it off right away. Order the original replacement part.

Great replacement and fixed the leaking running toilet. Easy to install

Made well