A sensing device for a hydrant can include a sensor located entirely within an interior cavity of a hydrant body of the hydrant and configured to measure a property of a fluid of a fluid distribution system and an antenna in communication with the sensor and positioned within the interior cavity.

A method of preventing tampering with a hydrant includes inserting an operating stem of the hydrant through a central bore of an operating nut to mount the operating nut on the operating stem; and rotatably threading a grooved nut onto a threaded distal end of the operating stem, the grooved nut defining an indentation in an outer surface of the grooved nut, wherein: rotatably threading the grooved nut onto the threaded distal end of the operating stem comprises engaging the indentation with a mating groove tool and rotating the grooved nut with the mating groove tool.

A method of preventing tampering with a hydrant includes inserting an operating stem of the hydrant through a central bore of an operating nut to mount the operating nut on the operating stem; and rotatably threading a grooved nut onto a threaded distal end of the operating stem, the grooved nut defining an indentation in an outer surface of the grooved nut, wherein: rotatably threading the grooved nut onto the threaded distal end of the operating stem comprises engaging the indentation with a mating groove tool and rotating the grooved nut with the mating groove tool.

A nozzle cap includes a cap body defining a cap axis, the cap body defining a circumferential wall extending circumferentially around the cap axis; and a vibration sensor including a shaft, the shaft defining a first end and a second end, the first end attached to the circumferential wall, the cap axis positioned closer to the second end than to the first end.

A valve closure device for a check valve can include a first valve member configured to rotate from an open position to a closed position; a second valve member configured to rotate from an open position of the second valve member to a closed position of the second valve member; and a hydraulic dampener coupled to each of the first valve member and the second valve member in each of the open position and the closed position of each of the first valve member and the second valve member, the hydraulic dampener configured to resist rotation of the first valve member towards the closed position of the first valve member and the second valve member towards the closed position of the second valve member.

A fire hydrant system includes a fire hydrant (upper barrel and bonnet) that is separate from a first cover tube and a second cover tube that house a valve stem. To activate the system, a user opens a gate valve via the valve stem, thereby allowing water to enter the upper barrel of the fire hydrant. When the gate valve is closed, a drain valve allows water to exit the upper barrel, lower barrel, and shoe fitting, preventing damage during freezing temperatures.

A fire hydrant system includes a fire hydrant (upper barrel and bonnet) that is separate from a first cover tube and a second cover tube that house a valve stem. To activate the system, a user opens a gate valve via the valve stem, thereby allowing water to enter the upper barrel of the fire hydrant. When the gate valve is closed, a drain valve allows water to exit the upper barrel, lower barrel, and shoe fitting, preventing damage during freezing temperatures.

A sensing assembly assembly for use with a fire hydrant having a stem includes a sensor in fluid communication with a water supply; at least one battery in electrical communication with the sensor; and an antenna in electrical communication with the sensor; wherein at least a portion of the sensing assembly is located within an interior cavity of the stem.

A sensing assembly assembly for use with a fire hydrant having a stem includes a sensor in fluid communication with a water supply; at least one battery in electrical communication with the sensor; and an antenna in electrical communication with the sensor; wherein at least a portion of the sensing assembly is located within an interior cavity of the stem.

A method of preventing tampering with a hydrant includes inserting an operating stem of the hydrant through a central bore of an operating nut to mount the operating nut on the operating stem; and rotatably threading a grooved nut onto a threaded distal end of the operating stem, the grooved nut defining an indentation in an outer surface of the grooved nut, wherein: rotatably threading the grooved nut onto the threaded distal end of the operating stem comprises engaging the indentation with a mating groove tool and rotating the grooved nut with the mating groove tool.