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below ground fiberglass cistern water storage tanks
Below ground fiberglass cisterns are ideal for underground water storage, drinking water, fire protection, irrigation, rainwater and grey water.

Below Ground Fiberglass Cisterns (water storage tanks)

Cisterns Water Storage TanksBelow ground water tanks (cisterns) are ideal for underground water storage for drinking water, fire protection, irrigation, rainwater and grey water.

General Information

  • Sizes range from 600 gallon to 50,000 gallon
  • Standard design and custom tanks available
  • Manufactured from F.D.A. listed material for potable water
  • Non-corrosive for long tank life
  • Wide variety of accessories and fittings available.

Failsafe Fiberglass Below Ground Storage Tanks
Type Capacity Weight Length Diameter
Ribbed 2000 gallon 667 lbs 96" 90"
Ribbed 3000 gallon 1000 lbs 132" 90"
Ribbed 4000 gallon 1335 lbs 168" 90"
Ribbed 5000 gallon 1667 lbs 204" 90"
Ribbed 6000 gallon 2000 lbs 240" 90"
Ribbed 7000 gallon 2334 lbs 276" 90"
Ribbed 8000 gallon 2667 lbs 312" 90"
Ribbed 9000 gallon 3000 lbs 348" 90"
Ribbed 10,000 gallon 3334 lbs 384" 90"

Glas-tec fiberglass septic tank

Glastec Fiberglass Below Ground Storage Tanks
Capacity Length Diameter
2,000 gallon 9'11" 8'
3,000 gallon 12'3" 8'
4,000 gallon 15'1" 8'
5,000 gallon 17'9" 8'
6,000 gallon 20'7" 8'
7,000 gallon 23'1" 8'
8,000 gallon 26'1" 8'
9,000 gallon 28'9" 8'
10,000 gallon 31'7" 8'
11,000 gallon 34'4" 8'
12,000 gallon 37'1" 8'
13,000 gallon 41'2" 8'
14,000 gallon 44' 8'
15,000 gallon 46'9" 8'


Cisterns are also available in 4', 6', 10' and 12' diameters and in many other capacities. Please call for information and pricing.