When selecting the size of the flush valve, it is essential to consider multiple factors to ensure a reasonable choice. The following is a detailed analysis of the selection of the toilet tank height and the flush valve size:
**Consider Tank Type**:
- Different types of toilet tanks (such as one-piece, or split toilet.) may have different installation requirements for the flush valve. When choosing a flush valve, ensure that it is compatible with the selected toilet tank
**Matching with Flush Valve**:
- The height of the toilet tank also needs to match the type and size of the flush valve. Ensure that the flush valve can be smoothly installed inside the tank and that its drainage capacity can meet the actual needs of the household.
**Note Drainage Capacity**:
- The size of the flush valve not only affects its installation but also directly relates to drainage capacity. Choosing the appropriate size of the flush valve can ensure that the toilet can quickly discharge waste water during flushing, avoiding blockages and odor issues.

About this item
- ✔️ For Use Dual Flush Toilet Kit: This toilet flush valves only fit for 2-Inch One-piece toilet. This toilet valve replacement kit only applicable to 2.56"-2.95"(65mm-75mm) (about the size of a baseball) drainage hole diameter. If the push button is installed on top, the toilet tank height should over 310mm.If the push button is installed beside the tank, the toilet tank height should over 220mm. Please measure the dimensions before buy it, otherwise it won't fit
- ✔️ Dual Flush Water Saving Type: Toilet repair kit dual flush water-saving type, can adjust water in the water tank for all drainage or quick drainage. Half and full water level adjusters to control water consumption. It has good silicone washer, good elasticity, high density, sustainable use, and not easy to break
- ✔️ Quick And Easy Installation: Our toilet flush valve is suitable for most one-piece toilet (not including flapper valve) easy to install in 10 minutes, and saves time and effort, get your toilet flushing like new again
- ✔️ Compatibility: For use with most 2inch one piece with top push button toilet, make sure whether the button size can match the cover button hole or not.
This dual flush valve is connected with the push button through a wire, and the push button size is 38mm.
- ✔️ Note: Please measure the size of your original part to match our products before purchasing. This will prevent you from receiving unsuitable products and waste your time. If you have any questions with this product, please contact us immediately