Sign up for M-101526-F3/F4 Flush Valve Replacement Kit – Fits Flushmate 501, 501B, 503, 504 Series, C-100500-K Compatible
So your Flushmate's acting up and not flushing right?
This M-101526-F3 / F4 flush valve replacement kit is what you need.
It's designed to fit Flushmate 501, 501B, 503, and 504 series – those power-flush systems that can get finicky over time.
The kit includes the C-100500-K cartridge assembly, which is the heart of the flush system.
Made from tough ABS plastic, it's heat-resistant and wear-resistant, so it'll hold up longer than the original.
And it meets OEM manufacturing standards, so you know it's legit.
Installing it is pretty straightforward – no special tools required.
Just pull out the old cartridge and pop this new one in.
Quick heads-up though: wear work gloves to protect your hands, and definitely read the installation instructions carefully before you start.
You want to make sure the water shuts off properly and the toilet flushes like it should.
Cost-effective fix that's way cheaper than replacing the whole system.
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