If youre struggling to maintain the water level in your bathtub while taking a bath, consider using a the Rocky Mountain Goods Bathtub Stopper. This stopper creates a watertight seal over the drain, enabling you to fill the tub with water. With this simple and effortless solution, you can easily stop and retain water in the tub when required. The rubber stopper is straightforward to install - simply insert it into the drain and remove it with the split-type metal ring. It is designed to fit bath tub drains of standard sizes ranging from 1-1/2 inches to 2 inches.