Caldwell - Model FB -Ground Supported Flat Bottom Storage Tank

• Welded steel ground storage tanks are low cost, flexible in a seismic event or foundation settlement, and can easily be modified or retrofitted
• Quickest style to construct and works well at higher ground elevations
• Standpipe designs can achieve additional pressure in the water system (especially for power outages)
• Reservoir designs can increase storage capacity in the water system (especially for fire protection)

• Smaller ground storage tanks are easier to disguise (harder to find) and can easily be painted specialty designs and attractive logos
• New epoxy and polyurethane coatings provide long life and require very little maintenance
• Four different styles of typical roofs: Ellipsoidal, Sphericone, Dome, Low Pitched Cone
• These reservoirs can accept a light-weight aluminum geodesic dome type of roof

• Typically, Ground Storage Tanks are the most economical way to provide simple long-term water storage.
• Tank diameters and heights are varied to meet customer requirements.
• Ornamental pilasters or other architectural treatments can be added for a unique and beautiful structure.
• Easiest style to self-maintain because many people are afraid of heights and no specialized equipment is necessary for maintenance.

• Normal capacity ranges are from 25,000 to 6,300,000 gallons with endless dimensional possibilities

• Caldwell Tanks adheres to all American Water Works Association (AWWA) standards for our potable water RES and SP style tanks
• If used strictly for fire protection, then Caldwell Tanks follows the National Fire Protection Agency (NFPA) 21 standard

American Water Works Association (AWWA D100 & D102)

• Steel frost-proof pressure/vacuum relief vent designed for maximum protection
• (1) 24" diameter roof manhole with hinged cover and hasp
• (1) 24" diameter roof hatch bolted for attachment of exhaust fan
• (1) 24" diameter bolted shell manhole with a hinged cover
• (1) 30" diameter bolted shell manhole with a hinged cover
• Purchaser-specified inlet/outlet connections
• Tank shell supported overflow pipe to grade level with concrete splash pad
• Exterior tank ladder for access to roof hatches and vent
• Grounding for minimizing lightning damage
• OSHA compliant safety climb devices on all tank ladders
• Sand pad supporting tank floor plates

Collective in the Water Tank Industry

• Alternate designs using Section 14 of AWWA D100-05 (alternate design basis for standpipes and reservoirs)
• Tank drain for washouts
• Larger diameter manholes and hatches
• Baffles or other chlorine retention measures
• Complete internal seal welding
• Non-freeze drain valve at base of tank shell
• Overflow flap valve
• High water elevation/pressure gauge
• Roof handrail
• Aluminum or custom roof vent
• Cellular antenna supports and provisions
• Painted logo, lettering, and custom graphics
• FAA lighting
• Locking ladder gates
• Ladder cages and/or platform landings
• Architectural treatment such as pilasters
• API flush-mount clean out
• Additional security or ornamental lighting
• Specialty trim or customized design