Save water and prevent a running toilet with a Leak Sentry® Fill Valve. This revolutionary valve includes a water saving roller clamp to make sure that the right amount of water goes into the bowl with every flush. It’s also the only fill valve with active leak detection, preventing a toilet from leaking without the homeowner having to take any special action. Best of all, when there’s no leak in the tank, it works just like a 400A, so you know you’ll get consistent performance flush after flush.

• Automatic "Locking" action alerts users to leaks before money and water are wasted
• Toilet remains fully operational
• Anti-siphon, code approved