Disclosed is a main valve for a hydrant including an internal rigid structure including a top surface, a bottom surface, and a locating feature, the locating feature defined in a one of the top surface and the bottom surface; and an outer shell at least partially enclosing the internal rigid structure and interacting with the locating feature.

Disclosed is a main valve for a hydrant including an internal rigid structure including a top surface, a bottom surface, and a locating feature, the locating feature defined in a one of the top surface and the bottom surface; and an outer shell at least partially enclosing the internal rigid structure and interacting with the locating feature.

Provided is an enclosure with an integrated hydrant. The enclosure includes a fluid flow conduit that transfers fluid from a fluid supply tube to a fluid outlet, which may be associated with the backflow preventer. The enclosure has a conduit that carries water from the fluid supply tube to the backflow preventer. Thus, a lower profile, lighter, and more aesthetically pleasing enclosure is provided.

A fire hydrant water leak and theft detection system is connected to a dry barrel fire hydrant. The detector is connected to the upper barrel portion of the fire hydrant below the nozzle assembly and includes a pair of electrodes. A signal is generated when water in the upper barrel portion closes an electrical circuit between the two electrodes due to the conductivity of the water between the electrodes. The detection system sends a signal to a network system upon detection of water in the barrel portion and relays to remote monitoring locations.

A fire hydrant water leak and theft detection system is connected to a dry barrel fire hydrant. The detector is connected to the upper barrel portion of the fire hydrant below the nozzle assembly and includes a pair of electrodes. A signal is generated when water in the upper barrel portion closes an electrical circuit between the two electrodes due to the conductivity of the water between the electrodes. The detection system sends a signal to a network system upon detection of water in the barrel portion and relays to remote monitoring locations.

A nozzle cap assembly includes a nozzle cap configured to mount on a fire hydrant, the nozzle cap housing defining an inner surface and an outer surface, the inner surface defining a nozzle cap cavity within the nozzle cap; an antenna enclosure mounted to the nozzle cap, a portion of the antenna enclosure disposed external to the nozzle cap; and an antenna positioned within the antenna enclosure.

An adjustable operating rod assembly is provided. In one embodiment a telescoping rod and tube are provided such that the length of the operating rod can be selectively adjusted in order to accommodate fluid inlet pipes of various lengths and regardless of manufacturer.

A liquid monitoring system includes a remote measurement device located at a location of the fire hydrant that is in contact with water provided by a water main. The remote measurement device has sensors that measure characteristics of the water and a communication interface that transmits measured information to a communication network device that may be located elsewhere on the fire hydrant. The communication network device communicates with a communication network.

A leak detection structure for attachment to a fire hydrant includes an enclosure, the enclosure defining a cavity internal to the enclosure and a leak detection subassembly located in the cavity, the leak detection subassembly including at least one leak detection sensor and at least one circuit.

Disclosed is a hydrant (1) comprising a hydrant housing (2) and a valve seat (3) arranged inside the hydrant housing (2). The hydrant (1) also comprises a valve body (4) resting against the valve seat (3) when the hydrant (1) is closed, wherein the valve seat (3) is arranged on an inner bayonet ring (5) being connected to an outer bayonet ring (6) through a bayonet coupling (7) and wherein the outer bayonet ring (6) is connected to the hydrant housing (2). A method for mounting a valve seat (3) in a hydrant (1) is also disclosed.