3525 Gallon Plastic Multi-Use Underground Liquid Storage Tank

Manufacturer Part

Manufactured for underground performance, this tank is made from virgin polyethylene plastic and is capable of resisting soil chemicals. This cistern tank is designed to keep your potable water safe and clean, and it supports an outlet pumping kit.

Accuracy of the images may vary. Refer to the specifications table to ensure precision.

3525 Gallon Underground Cistern Water Storage Tanks

The 3525-gallon underground water tank, or underground water cistern as it is often called, is manufactured from linear polyethylene in one seamless piece. Made from 100% virgin polyethylene plastic, this tank is designed for underground fresh potable water storage and underground rainwater storage applications.
  • This tank must remain 1/4 full at all times when buried in the ground.
  • Ribbed Design For Maximum Support
  • Resin complies with U.S. Food and Drug Administration regulation 21 CFR 177.1520 (c) 3.1 and 3.2.
  • Be sure to vent your tank.
  • Riser Extensions Sold Separately.
  • MAXIMUM BURIAL DEPTH - 24"" from the top of the tank.
  • Outlet plumbing kit must be bought and installed separately.
  • Polyethylene is unaffected by soil chemicals so the tanks will not rust or corrode. 

Key Specs
FDA Approved Yes
Gallon Capacity 3525
Lid Size 20"
Max Temperature 130 F / 54 C
NSF / ANSI 61 Approved Resin CA, MN, TX
Pressurized Use No
Specific Gravity 1.9
Length 211"
Width 102"
Height 51"
Weight 1305lbs
Material Polyethylene
Manufacturer Norwesco
Manufacturer Part Number 44390
Color White
Warranty 3 years
Shipping Height 51"
Shipping Length 211"
Shipping Weight 1305lbs
Shipping Width 102"
Ship Class OVS