Attempts were made to use the engine circulating pumps as additional bilge pumps, but the rapid rise of water prevented this.

In most HVAC systems, the use of sacrificial anodes and cathodes is not an option, as they would need to be applied within the plumbing of the system and, over time, would corrode and release particles that could cause potential mechanical damage to circulating pumps, heat exchangers, etc.

In the past circulating pumps operated continuously 24 hours a day or utilized a timer to schedule operating times around anticipated hot water demand periods.

Hydronic heating systems generally consist of a boiler or district heating heat exchanger, hot water circulating pumps, distribution piping, and a fan coil unit or a radiator located in the room or space.

Finally she heard the more familiar whine of circulating pumps and jelectronic equipment, and through the vinyl and canvas surrounding her she could see a few lights wink on.

On 11 August 1942 Saturn tried to leave Charleston for Norfolk, Virginia but the water circulating pumps for both of her boilers failed.

The failure of ESWS circulating pumps was one of the factors that endangered safety during the 1999 Blayais Nuclear Power Plant flood.

The higher-up units are just circulating pumps.

The system works much like a doll-size swimming pool, complete with circulating pumps and filter.