About This Product
If your toilet keeps running or you can hear water trickling, chances are the flapper is worn out.
This OasisFlow 3-inch THU500S flapper is a drop-in replacement for many TOTO toilets, and it's built to stop those leaks for good.
It's made from flexible silicone rubber that seals tight and resists chlorine and hard water better than standard rubber.

That means fewer leaks, less wasted water, and a quieter toilet.

It's compatible with a long list of TOTO models – THU138S, THU175S, THU331S, and many more – so it's easy to find the right match.

Best of all, you don't need any tools to install it.
Just pop the old one off, snap this one in, and you're done.
Even if you're not a handyman, you can do this in under five minutes.
OasisFlow designed this flapper to be durable and reliable, so you won't have to mess with it again for years.

If you're tired of the jiggly handle or the constant hiss of a leaking tank, this flapper is your fix.
It's affordable, effective, and saves you money on your water bill.
Give your toilet the love it needs.
This flapper is a simple but important part of your toilet.

The red silicone material is soft enough to form a perfect seal but tough enough to last.

It prevents water from seeping past, which stops the tank from refilling unnecessarily.
That not only saves water but also reduces wear on your fill valve.
The 3-inch size fits most TOTO flush valve tanks, and the installation is truly tool-free – just unhook the old one and clip the new one onto the ears.
It's a quick win for any homeowner.

If your toilet is acting up, this is the first thing to try.
OasisFlow has made a quality replacement that just works.

Keep one on hand for when you need it.