What You Need To Know About Ball Float Valves Before Buying One

Introduction to Ball Float Valves

What is a Ball Float Valve?

浮波掣和波曲掣組合後的前視圖
組合後的浮波掣和波曲掣前視圖

A ball float valve is a toilet tank fitting that controls the water level to prevent overflow or lack of water. It is a high cost-performance sanitary equipment that is widely used in various construction projects, including public rental housing estates managed by the Hong Kong Housing Authority.

How does a toilet tank ball float valve work?

The ball float valve is a major component of the toilet tank inlet valve. Its English name is Ball Float Valve, and its Chinese name is Floating Ball Valve. It works by using buoyancy to push the lever and seal the inlet with rubber to control the water level in the tank.

When you open the toilet tank lid, you’ll see a rod that can move up and down with a ball attached to the end – this is the ball float valve.

As the water level in the tank rises, the floating ball will also rise, pushing the lever upwards to close the inlet and stop the water flow.

As the water level in the toilet tank drops, the floating ball will also drop, pulling the lever down to open the inlet and allow more water to flow in. This maintains the water level in the tank within a certain range to prevent overflow or lack of water.

You can also refer to this article from DIY Home Improvement Web Hong Kong to learn more.

What types of ball valves are there?

There are mainly two types of ball float valves: side-entry and rear-entry. A side-entry ball float valve has the water inlet located on the side of the toilet tank, usually installed on the right or left side. A rear-entry ball float valve has the inlet located at the back of the tank, usually installed at the bottom or top.

Both types work on the same principle and serve the same functions. The type and shape are chosen based on the toilet tank structure and space. The type and shape will affect the ease of installation and maintenance, so they should be considered along with the tank’s position and size when choosing a ball float valve.

Our ball float valve products

Front view of toilet tank fittings - ball cock valve and ball float valve combination
Toilet tank fitting - side view of float ball

If you are looking for high quality, efficient and reliable toilet tank parts, you must check out our ball float valve and float ball. These two products are widely used toilet tank fittings in various construction projects, including Hong Kong Housing Authority managed public rental housing estates.

They have passed tests by HOKLAS accredited testing institutions and obtained Hong Kong Water Supplies Department’s ‘General Acceptance’. They use buoyancy to control tank water levels, are simple to use and easy to maintain. Our ball float valves offer affordable prices and are suitable for various side-inlet toilet tanks.

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