Prevents endless refilling of leaky tanks Adjustable bowl refill prevents wasteful overfill Unique locking action reveals leaks immediately Ideal for hotel/motel and multi-housing applications, homes and seldom-used bathrooms Fits most toilets, including 1.6 gpf models Toilet always remains operational Made of corrosion-resistant materials that withstand harsh water and constant use Meets all anti-siphon codes Adjustable height: 9 to 14 in.