Tired of running toilets and water waste? The Danco HydroStop is here to save the day! This innovative flapper replacement uses tower technology instead of traditional flappers for a better seal that stops leaks dead in their tracks. Easy drop-in installation takes about 10 minutes - no need to remove the tank or use special tools. The stainless steel cable is way more durable than those flimsy chains that always break. But here's the coolest part: the S.T.O.P. technology actually prevents bowl overflows! If your toilet clogs, just lift up on the handle and it immediately stops water from flowing into the bowl. No more messy bathroom floods! Fits most flush valve openings, so you don't have to worry about getting the wrong size. The EPA says 20% of toilets leak up to 200 gallons daily - don't let yours be one of them. Save water, save money on your bill, and save yourself from cleanup headaches. Designed by a fourth-generation plumber who knows what actually works in real bathrooms.