Xerxes fire protection water storage tanks

Xerxes Fire Protection

Xerxes fiberglass underground water tanks for fire protection water comply with most industry regulations and insurance requirements. Maintenance free and corrosion resistant, Xerxes tanks are perfect for space restricted projects and seismic earthquake-prone areas.

Xerxes system designs are engineered for compliance with NFPA 22, Water Storage Tanks for Fire Protection Systems, as well as NFPA 1142, Water Supplies for Suburban and Rural Fire Fighting.

NSF Listed and Labeled

Xerxes has gone the extra step by securing an NSF listing on the finished potable water storage tanks and the materials used to construct it.

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Watertight Xerxes Design

Xerxes underground water tanks structural design is rated for traffic load conditions as well as many weather conditions. Xerxes reinforced fiberglass tanks are manufactured with high-quality resin and glass. The underground water tanks have a unique integral rib design, reinforcing the structural integrity while maintaining a reasonable weight.


This cross-section of a Xerxes tank wall shows the encased rib shape that is then encased with another wall on the other side for optimal structural strength.

Xerxes underground potable tanks have been submitted for third-party lab testing, as well as the manufacturing facilities, have been inspected by NSF. This detailed evaluation and testing enable Xerxes tanks to be certified for compliance with NSF Standard 61 for drinking water with a verified labeling for the completed tank.

See the NSF 61 Certification

Maui water storage underground tanks

Underground Xerxes Tanks in the Kauloa Hawaii Regional Park