A method of manufacturing a main valve of a hydrant includes: forming an internal rigid structure including a top surface, a bottom surface, a side surface, and a locating feature, the locating feature defined in a one of the top surface and the bottom surface; positioning the internal rigid structure in a mold by contacting the locating feature with the mold; and forming an outer shell around the internal rigid structure.

A method of manufacturing a main valve of a hydrant includes: forming an internal rigid structure including a top surface, a bottom surface, a side surface, and a locating feature, the locating feature defined in a one of the top surface and the bottom surface; positioning the internal rigid structure in a mold by contacting the locating feature with the mold; and forming an outer shell around the internal rigid structure.

The alert system notifies the user, such as a first responder, to a response location at which a responder aid device is located. Such a responder aid device aids the user in responding to an emergency or alarm condition. The alert system communicates with the emergency detection system of a building. The emergency detection system detects emergency conditions, such as fire, carbon monoxide, ammonia levels, and other emergency conditions. The alert system receives the emergency signal from the emergency detection system. The alert system activates at least one beacon or multiple beacons. These beacons show the location of the responder aid device through an alert, such as a visual alert and/or an audible alert. A monitor device alerts the users as to which responder aid devices have been used, applied, or otherwise employed in response to the alarm or emergency conditions.

The alert system notifies the user, such as a first responder, to a response location at which a responder aid device is located. Such a responder aid device aids the user in responding to an emergency or alarm condition. The alert system communicates with the emergency detection system of a building. The emergency detection system detects emergency conditions, such as fire, carbon monoxide, ammonia levels, and other emergency conditions. The alert system receives the emergency signal from the emergency detection system. The alert system activates at least one beacon or multiple beacons. These beacons show the location of the responder aid device through an alert, such as a visual alert and/or an audible alert. A monitor device alerts the users as to which responder aid devices have been used, applied, or otherwise employed in response to the alarm or emergency conditions.

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 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.

An outer housing for a pressure monitoring system includes a sidewall shell defining an outer shell surface and a top end, the sidewall shell comprising an annular outer sidewall projection extending from the top end, the outer sidewall projection defining at least a portion of the outer shell surface; and a cap mounted to the sidewall shell, the cap defining an inner cap surface and an annular outer cap surface opposite the inner cap surface, the outer sidewall projection extending alongside the outer cap surface; wherein the outer cap surface defines a cap curved portion and the outer sidewall projection defines a projection curved portion meeting the cap curved portion, such that the cap is substantially flush with the sidewall shell.

A method for creating a pressure pulse in a fluid system with a noisemaker, the method includes opening a valve of the noisemaker to allow a fluid of the fluid system to flow through a valve cavity of the noisemaker, the valve disposed within the valve cavity, the noisemaker connected in fluid communication with the fluid system; closing the valve of the noisemaker to abruptly interrupt the flow of the fluid through the valve cavity; and repeatedly opening and closing the valve to generate a pulsating flow to the fluid system.

A method for creating a pressure pulse in a fluid system with a noisemaker, the method includes opening a valve of the noisemaker to allow a fluid of the fluid system to flow through a valve cavity of the noisemaker, the valve disposed within the valve cavity, the noisemaker connected in fluid communication with the fluid system; closing the valve of the noisemaker to abruptly interrupt the flow of the fluid through the valve cavity; and repeatedly opening and closing the valve to generate a pulsating flow to the fluid system.

A freeze resistant sanitary hydrant is provided that employs a reservoir for storage of fluid under the frost line or in an area not prone to freezing. To evacuate this reservoir, a means for altering pressure is provided that is able to function in hydrant systems that employ a vacuum breaker.