Firewater pump (diesel driven)

NFPA 15 / NFPA 13 / NFPA 20 / ISO 13702 (fire protection) / company legend practice (NFPA 20)

Drawn as

A pump (centrifugal circle, or a vertical turbine pump into a caisson) driven by a "DE" diesel engine box, discharging into the firewater ring main.

Meaning

Diesel firewater pump that starts on low ring-main pressure or a fire signal. Becomes diesel-firewater-pump. Electric firewater and jockey pumps are drawn with M.

Variants

Offshore pumps are usually vertical caisson pumps with a right-angle gearbox
Jockey pumps keep the ring main pressurised and are drawn small with M