OH Fire Sprinkler key terms

A network of piping with sprinklers that discharges water automatically when heat from a fire activates individual heads, with supply and control components designed as a complete integrated system.

Any arrangement of water supply, piping, valves, alarms, and discharge devices installed to detect, control, or extinguish fire, including sprinkler, standpipe, and related suppression systems regulated under contractor licensing.

The credential issued by the Ohio Division of State Fire Marshal authorizing a business entity to design, install, service, or maintain fire protection systems within a stated scope.

A Division of State Fire Marshal document issued to an individual confirming that the person meets the training or examination requirements to perform regulated fire protection system work under a licensed contractor.

A person holding the required registration or certification who is designated by a licensed contractor to supervise regulated work and whose qualifications support the contractor's license.

Required periodic training hours a registrant must complete to renew a certificate, covering code updates, new technology, and safety topics approved by the authority having jurisdiction.

The organization, office, or individual responsible for approving equipment, installations, and procedures, typically the local fire official or state fire marshal's designee enforcing the adopted code.

The formal examination of submitted design drawings and hydraulic calculations by the authority having jurisdiction to confirm compliance before installation may begin.

Detailed working drawings prepared by the contractor showing pipe routing, sizes, sprinkler locations, hanger details, and equipment, submitted for approval before installation.

Record drawings revised after installation to reflect actual field conditions, piping changes, and device locations, retained for maintenance and future modification reference.

The documented inspection and test performed at completion, including hydrostatic, flow, and alarm checks, to demonstrate the system operates as designed before it is placed in service.

A heat-actuated discharge device with a fusible element or glass bulb that opens at a rated temperature to distribute water in a defined spray pattern over a protected area.

The activation temperature marked on a sprinkler's heat-responsive element, selected to be above expected ambient ceiling temperatures while opening promptly during a fire.

A sealed frangible vial containing heat-sensitive liquid that shatters at its rated temperature to release the sprinkler's cap and permit water flow.

A numerical coefficient expressing the discharge characteristics of a sprinkler or nozzle, relating flow in gallons per minute to the square root of pressure in psi.

The most hydraulically demanding remote area of sprinkler operation, expressed in square feet, used as the basis for calculating required water flow and pressure.

The mathematical analysis of pipe friction loss, elevation changes, and device flows that determines the water supply pressure and flow needed to meet design demand.

The portion of the sprinkler system hydraulically farthest from the water supply, where pressure is lowest and which typically governs the required supply characteristics.

The additional water supply pressure or flow kept in reserve above calculated system demand to account for fluctuations, aging pipes, and uncertainty in the supply curve.

A graph plotting available flow versus residual pressure at the supply point, derived from flow tests, used to confirm the supply meets system demand.

The vertical supply pipe that carries water from the source or main to the sprinkler piping on upper levels, typically containing control valves, gauges, and alarm devices.

A one-way valve on the riser that permits water to flow into the sprinkler system while preventing backflow of stagnant or contaminated water into the public supply.

An assembly of check valves and relief components installed to stop reverse flow of water from the fire protection system into the potable water supply.

Any actual or potential link between a potable water supply and a nonpotable source or system that could allow contamination to enter drinking water.

A flow test conducted through the main drain valve to verify that the water supply and control valves are unobstructed and functioning at expected pressure.

A pressure test in which the system is filled with water and pressurized above working pressure for a specified duration to reveal leaks in piping and joints.

An instrument installed on the riser and other points to display water pressure, used to monitor supply conditions and confirm test pressures during acceptance testing.

A sprinkler system in which piping is maintained full of pressurized water at all times so that discharge begins immediately upon sprinkler activation.

A sprinkler system in which piping upstream of the sprinklers holds compressed air, and a dry pipe valve releases water into the piping when a sprinkler opens and pressure drops.

A special valve separating the air-filled sprinkler piping from the water supply, designed so that a drop in air pressure causes it to open and admit water.

A system in which a detection device must operate before water is admitted to the sprinkler piping, providing an extra safeguard against accidental discharge in sensitive occupancies.

A system with open sprinklers or nozzles in which a single detection signal opens a deluge valve, discharging water simultaneously from all devices in the protected area.

A quick-opening valve actuated by a detection system that admits water to open sprinkler piping in a deluge or preaction arrangement.

Equipment that maintains the required air pressure in dry pipe or preaction piping so the valve stays closed until a sprinkler or detector operates.

A sensor such as a smoke, heat, or flame detector that responds to fire indicators and can trigger alarms or release valves in preaction and deluge systems.

A fixed piping system with hose connections at various levels that supplies water for manual firefighting by building occupants or the fire department.

An exterior pipe fitting where fire apparatus can pump supplemental water into a sprinkler or standpipe system to boost pressure and flow during an incident.

A dedicated pump that increases water pressure and flow from the supply to meet sprinkler or standpipe system demand when the public supply is inadequate.

A valved outlet on a standpipe that provides a connection point for fire hoses, allowing controlled water discharge at a specific floor or location.