In-Plant Fire Protection Water Supplies

Supply Arrangements

Depending on the site, the public water main – sometimes boosted by a pressure pump – may serve as the sole source, or dedicated fire protection water tanks with their own pumps are used where the public supply cannot deliver the required pressure or flow. Where protection requirements are high, design guidelines call for two independent water sources so that the failure of one does not disable the extinguishing system.

Network Layout and Testing

Looped mains, rather than dead-end branches, increase reliability because a pipe break does not fully interrupt supply. Supervised isolation valves prevent an undetected closure of individual network sections. Periodic flow tests verify whether the actually available water quantity still matches the original design basis.

Insurance Relevance

The internal fire protection water supply is the foundation of every extinguishing system and must be clearly distinguished from the external, municipal water supply and fire brigade access, which concern the arrival and deployment of external responders. Insufficient capacity, corrosion or undetected network deterioration undermine the effectiveness of even correctly designed systems and are among the most common hidden deficiencies found during surveys.