Sirr0und Fluidmaster Leak Sentry Ballcock All the proven features of the model No. 400A, plus Leak Sentry technology to halt costly undiscovered toilet tank leaks. Works by preventing endless refills of a leaky tank when a tank is emptied by a leak, its unique locking action forces people to press the flush lever twice (once to refill and again to flush). At most, only 1 tank of water can leak from a model No. 400LS equipped toilet. Adjustable bowl refill prevents wasteful overfill. Ideal for hotel/motel, multi-housing applications, vacation homes, and seldom used bathrooms. Toilet always remains operational. Height adjusts 9" to 14" to fit most toilets, including 1.6 GPF models. Anti-siphon operation, code approved. Made of corrosion-resistant materials that withstand harsh water and constant use. 5 year warranty. MPN# 400LSRP4 SKU# 477044UPC# 39961415080