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A vacuum pump is equipped with check valves on both sides of the piston so that the pump moves fluid when the reciprocating component is moving in either direction.

Without condensate in a surge tank, the low water alarm on the tank should sound.

The ASME Boiler and Pressure Vessel Code requires at least one water column on all boilers.

A low limit control is a pressure control that senses steam pressure and automatically shuts down a burner if the operating control fails.

A flame scanner sensing device that contains lead sulfide is used to detect infrared light.

The ASME Boiler and Pressure Vessel Code requires at least one water column on all boilers.

A flame scanner sensing device that contains lead sulfide is used to detect infrared light.

Balancing the water flow in a two-pipe reverse-return system is much easier than in other types of systems because the resistance to the water flow is the same for all heating units.

___ can result in bags and blisters.

Hot water boilers use ___ instead of the bottom blowdown valves used with steam boilers.