5 Types of Toilet Fill Valves and How They Work

Toilet fill valves are crucial components that control the water flow into the toilet tank. They are responsible for refilling the tank after each flush, and they play a key role in regulating the water level in the tank. Here are 5 types of toilet fill valves and how they work:

Float-Cup Fill Valves

Float-cup fill valves are the most common type of toilet fill valve. They have a hollow plastic or brass float that rises and falls with the water level in the tank. As the float rises, it opens a valve that allows water to flow into the tank. When the float reaches the desired water level, it shuts off the valve.

Floatless Fill Valves

Floatless fill valves are a newer type of toilet fill valve that do not use a float. Instead, they use a pressure sensor to detect the water level in the tank. When the water level drops, the valve opens and allows water to flow into the tank. When the water level reaches the desired level, the valve shuts off.

Diaphragm Fill Valves

Diaphragm fill valves use a flexible rubber diaphragm to control the water flow into the tank. As the water level in the tank drops, the diaphragm flexes and opens a valve that allows water to flow into the tank. When the water level reaches the desired level, the diaphragm flexes back and shuts off the valve.

Piston Fill Valves

Piston fill valves use a piston to control the water flow into the tank. As the water level in the tank drops, the piston moves down and opens a valve that allows water to flow into the tank. When the water level reaches the desired level, the piston moves up and shuts off the valve.

Pressure-Assisted Fill Valves

Pressure-assisted fill valves use the water pressure in the home’s plumbing system to fill the toilet tank. They are often used in commercial settings because they provide a powerful flush. When the toilet is flushed, the water pressure in the plumbing system pushes water into the tank through the fill valve. When the tank is full, the valve shuts off.

In conclusion, toilet fill valves are crucial components that control the water flow into the toilet tank. The above 5 types of toilet fill valves, including float-cup, floatless, diaphragm, piston, and pressure-assisted valves, offer a range of options for homeowners to choose from. Understanding how each type of toilet fill valve works can help you choose the right one for your needs and keep your toilet functioning smoothly.