System and Method for Run-On Detection

A vacuum breaker assembly for use with a plumbing fixture and a valve configured to control discharge of water through an outlet and into the plumbing fixture, the vacuum breaker assembly comprising:

• a vacuum breaker tube configured to be connected in fluid communication with the outlet of the valve, between the valve and the plumbing fixture, the vacuum breaker tube having a wall and defining an interior to receive the discharge of the water from the outlet;
• a vacuum breaker sleeve received within the vacuum breaker tube and fixed in position within the vacuum breaker tube, the vacuum breaker sleeve defining an inner passage, such that water discharged through the outlet is configured to flow through the vacuum breaker tube and the inner passage of the vacuum breaker sleeve to the plumbing fixture;
• a vacuum breaker supported by the vacuum breaker sleeve and positioned within the inner passage of the vacuum breaker sleeve, wherein the vacuum breaker is configured to prevent backflow of water from the plumbing fixture into the valve;
• and
• a sensor assembly configured to sense a presence of water within the vacuum breaker tube and comprising a first probe extending through the wall of the vacuum breaker tube and into the interior of the vacuum breaker tube to be exposed in the interior of the vacuum breaker tube, and a second probe extending through the wall of the vacuum breaker tube and into the interior of the vacuum breaker tube to be exposed in the interior of the vacuum breaker tube, wherein the first probe and the second probe are spaced from each other and electrically isolated from each other.

A sensor for detecting presence of water in a conduit, comprising:

• a sensor body having a first passage and a second passage therethrough, the second passage spaced from the first passage, the sensor body comprising an outer portion configured to be positioned on an exterior of the conduit and a projection configured to extend through a hole in the conduit and into an interior of the conduit, wherein the outer portion is wider than the projection to permit sealing of the outer portion around the hole, the sensor body comprising an insulative material located between the first passage and the second passage;
• a first probe received in the first passage and having a first probe contact accessible at the outer portion of the sensor body, the first probe extending through the first passage and configured to be exposed in the interior of the conduit;
• and
• a second probe received in the second passage and having a second probe contact accessible at the outer portion of the sensor body, the second probe extending through the second passage and configured to be exposed in the interior of the conduit,
• wherein the insulative material of the sensor body electrically isolates the first probe from the second probe when the first and second probes are received in the first and second passages, respectively.