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.

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.

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

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

___ air controls combustion efficiency and is usually introduced into a furnace from below the burner.

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

Relief valves should be manually tested every 30 days as recommended by the ASME Code.

A(n) ___ system is a solid-state control system in which a building automation controller is wired directly to control devices.

A safety valve’s capacity is listed on the data plate attached to the safety valve.