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A hazardous material is a substance that could cause injury to personnel or damage to the environment.

Dissolved solids are impurities such as calcium, silica, and iron dissolved in solution.

A forced draft fan is located in the breeching.

Boiler room accidents can occur at any time.

A modulating pressure control regulates the burner firing rate of high fire to low fire by sending an electrical signal that controls a modulating motor connected to a combustion equipment control linkage.

Pipe-mounted circulating pumps are smaller pumps that are attached directly to the piping.

A modulating pressure control regulates the burner firing rate of high fire to low fire by sending an electrical signal that controls a modulating motor connected to a combustion equipment control linkage.

In a high pressure gas system, gas is supplied through a high pressure gas main at a higher pressure than that within a typical residential gas supply line.

Pipe-mounted circulating pumps are smaller pumps that are attached directly to the piping.

If the top line to a gauge glass is closed or clogged, the glass will fill with water.