Fire Sprinkler Reservoirs

Underground Water Storage Tanks

Fiberglass Tanks
Engineering Assistance

Fire Sprinkler Reservoir Mounted Inside an Underground Vault or Basement

Fire Sprinkler Reservoir Mounted Inside an Underground Vault or Basement
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Fire Sprinkler Pump Mounted Inside a Storage Tank with Pump House Above

Fire Sprinkler Pump Mounted Inside a Storage Tank with Pump House Above
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NFPA MemberFIRE SPRINKLER RESERVOIRS are holding tanks used to provide fire protection water for a sprinkler system that demands more water than the domestic water line serving the building can supply.

This is a common occurrence in older commercial areas where underground water lines are too small for modern fire flows. Similar conditions are encountered when a rural commercial building or school is being served by a domestic well with limited delivery volume. In cases such as these, water must be stored in a tank and be available in sufficient quantity to satisfy the fire sprinkler pump demand.

Underground water storage tanks remain ice free, rarely propagate algae or bacteria, and are far less likely to be the target of vandalism or graffiti. Underground water supplies have minimal "visual Impact" and therefore maintain the property values of nearby commercial and residential real estate.

When a small above ground pump house is unsatisfactory (See Illustration #2) from an architectural perspective, the pump can be installed below grade in a precast concrete vault with zero visual impact after landscaping (See Illustration #1). Care must be taken to isolate the tank and piping from direct contact with the concrete floor or walls. Either of the illustrated concept designs can be modified as necessary to fit the specific requirements of any job.

Always contact your Fire Chief and local Public Building Officials before moving ahead with a storage tank project involving fire sprinklers or hydrants. Improper tank size, location, or plumbing layout may reduce the effectiveness of the water supply, creating liability and possible occupancy issues.

Darco manufactures NFPA compliant direct bury fiberglass water tanks for fire sprinkler reservoirs and suction fire cisterns.

Project Showcase

Fire Sprinkler Reservoirs picture

Business (California): Two - Underground fiberglass tanks, each with a wet well to house the vertical turbine pumps / 18,000 gallon each

Office Complex (California): Two -Underground fiberglass tanks / 15,000 gallons each

Church (Colorado): Underground fiberglass tank / 30,000 gallons

Business (Colorado): Underground fiberglass tank for fire sprinkler reservoir with Sump Pump / 22,000 gallons

Fire Station (Colorado): Underground fiberglass tank for Fire Sprinkler Reservoir, Truck Fill, and Test Tank / 40,000 gallon

Grocery Store (Colorado): Fire Sprinkler Reservoir with Wet Well: Two underground fiberglass tanks manifolded together / 90,000 gallons total

Valley High Nursing Home (Illinois): Fire Sprinkler Reservoir to augment city water line supply / 30,000 gallons

Retail Store (Michigan): Fire Sprinkler Reservoir with Wet well / 100,000 gallon

Commercial Development (Missouri): Fire sprinkler tank / 30,0000 gallons

St. Benefis Hearts Tower (Montana): Fire reservoir for sprinklers / 10,000 gallons

Retail Store (Nevada): Fire Sprinkler Reservoir with wet well to house the vertical turbine pump / four tanks 220,000 gallons total

Millbrook High School (New York): Underground water holding tank for fire sprinklers / 30,000 gallons

Business (New York): Fire Sprinkler Reservoir with discharge to pump in building / 20,000 gallons

Mast General Store (North Carolina): Fiberglass storage tank for fire sprinklers / 40,000 gallons

Walgreens Drug Store (North Carolina): Fiberglass underground tank for commercial fire sprinklers / 40,000 gallons

Grace Baptist Church (Ohio): Direct bury water tank for the church fire sprinkler system / 20,000 gallons

Nursing Home (Ontario, Canada): Fire Sprinkler Reservoir / 45,000 gallons

Harrell Automatic Sprinkler Co. (Pennsylvania): Underground fiberglass tank for emergency water supply to small commercial building / 6,000 gallons

Hospital (South Carolina): Fire Sprinkler Reservoir / 15,000 gallons

Nursing Facility (Virginia): Fire Sprinkler Reservoir with discharge to Wet Well / 25,000 gallons

Ranch (Wisconsin): Underground fiberglass tank / 52,000 gallons

The Ranch Resort Complex (Wyoming): Underground fiberglass water storage for overhead sprinklers / 20,000 gallons

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