Tank Installation Guide

Foundation Requirements:

• Level surface with maximum 1/8" per foot slope
• Compacted gravel base minimum 6" thick or reinforced concrete pad
• Pad diameter = tank diameter + 2 feet minimum on all sides
• Consider drainage slope away from foundation (minimum 2% grade)
• Install moisture barrier under concrete pads
• Allow concrete to cure minimum 7 days before tank placement

Foundation Specifications by Tank Size:

• 15,000-30,000 gallons: 6" compacted gravel or 4" concrete
• 30,000-75,000 gallons: 6" reinforced concrete recommended
• 75,000+ gallons: 8-12" reinforced concrete required

Pre-Delivery Checklist:

• Verify site access routes are clear and adequate
• Confirm crane positioning and capacity
• Check weather conditions - avoid high winds
• Have installation crew ready on-site

Unloading Procedure:

• Inspect tank for shipping damage before unloading - document any issues
• Use appropriate lifting equipment (crane capacity = 2x tank empty weight minimum)
• Attach lifting straps ONLY to designated lifting lugs
• Use spreader bars to prevent tank deformation
• Never lift tank by fittings, manways, or sidewalls
• Control tank movement with tag lines during lifting

Positioning Guidelines:

• Center tank on prepared foundation using centerline marks
• Ensure tank is perfectly vertical using 4-foot level on multiple sides
• Maximum out-of-plumb: 1/4" per 10 feet of height
• Orient inlet/outlet fittings for optimal piping layout
• Maintain minimum clearances from buildings and property lines
• Allow 360° access for maintenance operations

Anchoring Methods:

• Install anchor bolts per manufacturer specifications
• Use stainless steel or galvanized hardware for corrosion resistance
• Torque bolts to specified values (typically 50-75 ft-lbs)
• Install seismic restraints as required by local codes
• Add wind load cables for exposed locations (winds >100 mph)
• Document all anchor points with photos for warranty

Seismic Requirements:

• Zone 1-2: Standard anchoring typically sufficient
• Zone 3: Additional restraints required
• Zone 4: Full seismic restraint system mandatory

Connection Guidelines:

• Use flexible connections to prevent stress on tank fittings
• Support all piping independently with proper hangers
• Install proper gaskets and use appropriate sealants (NSF approved for potable water)
• Add isolation valves within 3 feet of tank connections
• Install unions for easy maintenance access
• Slope all piping for proper drainage

Required Connections:

• Inlet piping: Anti-siphon valve and air gap required
• Outlet: Emergency shutoff valve accessible from ground level
• Overflow: Pipe to safe discharge area, minimum 1.5x inlet size
• Drain: Full-port valve for complete tank drainage
• Vent: Atmospheric vent with insect screen
• Level indicator: Connection for gauge or sensor

Testing Procedure:

• Perform visual inspection of all connections and fittings
• Check torque on all bolted connections
• Conduct hydrostatic test - fill tank slowly (max 2 ft/hour)
• Fill to 6 inches, stop and check for leaks
• Continue filling in stages, checking at 25%, 50%, 75%, and 100%
• Hold at full capacity for minimum 24 hours
• Check for leaks at all fittings, seams, and connections
• Verify proper operation of all valves and vents
• Test overflow system functionality
• Document test results with photos and sign-off sheet

Final Commissioning:

• Drain test water if switching to different contents
• Clean and sanitize for potable water applications
• Install and calibrate level monitoring systems
• Label all valves and controls
• Provide operation manual to facility personnel
• Schedule initial maintenance inspection