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Water supplied to a boiler.
Coupling style that wraps around the pipe and provides a leak-proof joint while allowing for some flexibility at the
A pump used to increase the output of the primary pumps in a system, or to supplement the water
The region of a fluid flowing through a pipe contacting the pipe wall. This is where friction between the
The pipes supplying sprinklers, either directly or through sprigs, drops, return bends, or arm-overs.
Joins metals by the melting of non-ferrous alloys (filler metal) that have melting points above 800°F | 425°C, but
The outdoor temperature at which total heat losses from conditioned spaces, equal internally generated heat gains.**
A heat energy measurement unit. One BTU is the heat energy required to raise the temperature of a pound
Secondary bearing for the piston rod on a valve that is pneumatic or hydraulically actuated. Also called a “drive
