Korky vs fluidmaster

Korky vs Fluidmaster, Which Toilet Replacement is Best?

If you have ever had to buy a toilet plunger, chances are that you were faced with the difficult decision of which type to purchase. One option is the popular Korky brand and the other is Fluidmaster. The two brands offer different features at various price ranges so it can be hard to know what will work best for your needs.

Our team did the research on which replacement valve is best for your home in 2021. We found out that both Fluidmaster and Korky make good valves, but we recommend you go with Fluidmaster if it’s available to replace your current model!

Korky vs Fluidmaster Compared

Noisy valves can make life miserable. Luckily, Fluidmaster has a solution for noisy toilet flushing with their noise-reducing valve kit! Korky also offers an alternative to noisy toilets in the form of a quiet anti-siphoning water seal and an easy installation system that cuts down on the time required.

Anti-Siphon Seal: When your tank is full, it creates suction which causes air pockets at lower levels. The result? A loud sound as you flush because of this vacuum state where there's no way for gas or steam to escape fast enough from inside your plumbing pipes. This problem isn't exclusive either; some natural phenomena like high winds are capable.

Fluidmaster 400AH PerforMAX Universal

Fluidmaster 400AH PerforMAX Universal High Performance Toilet Fill Valve, Easy Install

ENHANCES YOUR TOILET’S POWER: Toilet fill valve replaces old, inefficient valves and eliminates noise while generating 2X greater refill rates than standard fill valve designs

- UNIVERSAL DESIGN: Fill valve adjusts easily from 10 – 15 inches and is ideal for use in high efficiency 1.28 to 1.6 gallons per flush toilets

- ADJUSTABLE ROLLER CLAMP: A water-saving roller clamp lets you regulate the fill level in the bowl to help save water and money

- EASY INSTALLATION: Easily installs in 10 minutes or less to get your toilet flushing like new again.

Korky 528 Toilet Fill Valve, Universal, BLACK

Korky 528 Toilet Fill Valve, Universal, BLACK

Korky universal fill valve is designed to fit most 2-piece & 1-piece toilets. It’s easy to install and keeps your toilet running smoothly. Includes: refill tube, metal refill tube clip, mounting nut, cone washer, coupling nut, tamper proof key & instructions.

Korky 528 Universal Fill Valve replaces worn down fill valves and ballcocks for different types of 2-piece & 1-piece toilets. Korky Universal Fill Valve installs easily with a twist-lock adjustment that makes installation.

Key Differences

The two replacement valves have many similarities but a few important differences. Some of the most important things to consider when choosing between these are size, noise level, and price.


The Korky 528 and the Fluidmaster 400AH are both adjustable toilet valve models, but they fit slightly different sized toilets. The Korky model adjusts from 7 3/4″ to 13 1/2″ while the Fluidmaster can be adjusted from 10 inches up to 15 inches. Both will work with an average size toilet, but if you have a smaller one then it may make sense for you to go with the more compact design of this product; on larger ones though there's no better option than going for this one instead!

Noise Level

Noise level is important when choosing the right valve- no one wants to be up all night listening to their toilet! Both models are quiet by design, but Fluidmaster valves tend to make less noise than other alternatives.

The most common topic are talk about:

  • fluidmaster toilet
  • solid brass bolts:
  • year warranty:
  • flapper
  • repair
  • materials
  • style
  • hardware
  • material
  • stainless