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Korky Vs Fluidmaster

When replacing your toilet parts, you want to go for something that will work for the longest time. Korky and Fluidmaster are two of the most popular brands when it comes to making fill valves. They are modern and do not use the old ballcock fill valve that has a balloon-like structure protruding from a stick. This helps to save space inside the toilet by removing the giant floating object.

Both brands provide good features that make using your toilet a convenient affair. However, they still have their own differences. In today’s post, we’ll take a look at the features of each brand and help you distinguish between them. This will help you find what works for your needs.

Korky Description

The Korky toilet kit is made using stainless brass that provides long-lasting performance. When compared to Fluidmaster, it is super calm and quiet when flushing and eliminates unnecessary noise. It is strong in its construction and durable. It’s a go-to choice when it comes to fixing loud and refilling toilets.

Another important feature that Korky provides is a lot of ease when it comes to fitting the toilet kit. The brand even provides a simple guide with easy instructions on how to go about it. It helps new users install the kit like a pro.

Korky makes sure that on top of providing comfort, you get a 5-year warranty for restoring or repairing any broken parts. This assurance comes with no extra charges, giving you the peace of mind that you need. You don’t have to worry about incurring extra costs in the near future because of a faulty product.

Most of the toilet kits offered are also available in different styles. This allows you to choose what helps to solve the type of toilet problem that you have. They are also made from durable materials that are easy to maintain. Some are also light in their construction. They can easily be carried or held when installing them in place.

In addition, their universal design allows them to be compatible with most toilet designs. They can be adjusted to eliminate any unnecessary noise and to refill toilets. Also, the availability of different kit sizes ensures that they can fit in any size of the toilet that you have. Most use the internal float design that is nice and compact.


  1. Available in different styles
  2. Comes with a 5-year warranty
  3. Made using durable material
  4. Reduces toile noise when refilling
  5. Super easy to fit and install


  1. Some users have complained the product stopped working after a short period

Fluidmaster Description

The Fluidmaster toilet kit is constructed using solid brass bolts that are durable. Unlike the Korky toilet kit, the one produced by Fluidmaster produces a loud noise when you flush your toilet. The solid brass used in the construction makes the kit heavy-duty. This is due to the flush valves, toilet handles, and spongy flappers that add a bit of weight.

Nevertheless, Fluidmaster toilet kits are not difficult to install. They are purchased together with an instruction guide that helps any buyer to understand the setup steps. Fluidmaster also provides a 5-7 years warranty for replacements in case the product breaks. Any broken parts can be restored and repaired with ease.

Most models are designed with a universal design. This makes sure that they can fit in most toilets. Their simple construction also ensures that the fittings are compatible with how most toilets are made. Plastic and rubber materials make it easy to maintain the toilet kit. They are super helpful in stopping leaky and runny toilets.

Fluidmaster uses a cylinder that floats on the outside. This design helps to save on space and at the same time, allows the user to see how the kit works. The float is built to rise together with the water level and cut the supply once the level reaches the top.

Toilet valves here are made to help you fill your tank quickly. They also keep your toilet functioning at all times. The kit includes a frame flapper made of durable materials that align with the drain in the tank for a powerful and consistent flush. Its simple design allows the homeowner to install it in less than ten minutes.


  1. Durable and high-quality toilet kits
  2. Comes with a 5-7 year warranty
  3. Universal style that fits in most toilets
  4. Decently priced
  5. Simple construction makes it easy to install


  1. Noisy when flushing

Overview and Conclusion

Korky toilet kits use stainless steel while Fluidmaster toilet kits use brass bolts. Both are designed and built to last a long time. What you need to do is avoid low-quality and cheap replacement bolts. Kits that sell brass-plated bolts tend to rust and wear off with time. This then leads to a rusty and leaky tank.

If you prefer smart design and value, Fluidmaster is the better brand between the two. If you want durability and quality, Korky offers both at a reasonable price. The latter has quality materials that feel better in the hands when compared to the former.


Is Fluidmaster a good brand?

Fluidmaster is a great brand that offers a lot of advantages. It provides kits that have a universal design and that are easy to install. Adjustability is also made possible thanks to products that can fit most toilets regardless of the brand. Whether you want a different water flow or height; the Fluidmaster toilet kit allows you to do adjust it to your liking.

Does Toto fit a Fluidmaster?

The Fluidmaster 400A is not part of Toto’s original equipment. However, Fluidmaster makes a version of the 400A that comes with an adjustable refill rate that can be fixed in Toto toilets. It’s a good replacement option that one can go for if they have this type of toilet. It’s important to note that the replacement only works for this version.

How do I know if my fill valve is bad?

You’ll know that your fill valve is bad if your toilet runs constantly, the flush is weak or won’t flush at all, or if the tank takes too long to refill.

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