Does a Toilet Come with a Built-in Check Valve？

Toilet installation often requires a check valve to prevent water from the tank from flowing back into the water supply line. So, does a toilet come with a built-in check valve? Let’s take a closer look.

Does a toilet come with a check valve：

Toilets are equipped with a check valve, which is typically located at the water tank's inlet. This valve prevents water from the tank from flowing back. It usually closes automatically once the water in the tank reaches a certain level and opens again for water to refill after flushing. The materials used for the check valve are quite simple, offering benefits such as quick closure and long service life.

How to choose a toilet：

1、Check the glaze of the toilet

One way to evaluate a toilet is to examine the surface glaze, which is the most straightforward way to assess quality. You can touch all the glazed surfaces inside and outside the toilet. A smooth and even surface suggests good self-cleaning ability, while bubbles or particles indicate inferior quality. Special attention should be paid to the glaze around the drain opening, as insufficient glazing can lead to dirt accumulation and clogs.

2、Toilet hardware and accessories

The components of the toilet are critical for its proper functioning. This includes parts such as the float in the tank, which are essential for flushing and refilling the tank. If these components are faulty, the flushing won’t work correctly. When choosing a toilet, make sure to test the flush button to see if it rebounds properly.

3、Toilet style

Toilets are mainly available in two styles: one-piece and two-piece. One-piece toilets are more popular due to their ease of installation and maintenance. Two-piece toilets have their tank installed separately, which can be troublesome if repairs are needed since it may require wall drilling.

4、Toilet flushing mechanism

There are generally two types of flushing mechanisms: siphonic (or siphon) and washdown. Each has its pros and cons, and the choice can depend on personal preference. If you prefer a quieter flushing system, you might opt for a siphonic toilet.

In summary：we hope this gives you a better understanding of whether toilets have built-in check valves. If you would like to learn more about related topics, please follow our website.