Why must automatic fire pumps have their suction under a positive pressure?
In situations where the water volume is adequate but the pressure is not sufficient to serve a sprinkler system directly, what is the purpose of using a pressure tank?
A fire department connection is a standard part of a fire sprinkler system installation and would be omitted only if the building were inaccessible to the fire department or the sprinkler system exceeded the pumping capacity of the fire department, such as a deluge system. A fire department connection may also be omitted from a single-story building that does not exceed 2000 ft2 (186 m2) in size.
1. What is the usual diameter considered inadequate and unreliable for street mains in the context of fire protection water supply?
2. When a secondary supply is required to complement the public water supply for fire protection, what is the term used to describe the connection between the public and private fire service mains, especially when the private main is fed from a no potable source?
To prevent frequent, repeated starting of electrically driven centrifugal pumps, what methods can be used according to the provided passage?
