Underground Septic Tanks

Underground Septic Tanks

Tank Mart plastic underground septic tanks are made from polyethylene plastic. Our underground septic tanks are a great alternative to underground concrete septic tanks because they last longer, easier to install, and substantially cut your overall underground septic tank costs. These underground poly septic tanks are designed for both commercial and residential applications. These tanks carry a full 3 year warranty and are perfect for any project requiring a underground septic tank. See our list below.
  • Product
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Name Capacity Length Width Height Diameter Part # Price

1000 Gallon Legacy Septic Tank | 44465

1000 Gallons 102'' 60'' 63'' N/A 44465
$2,207.87

1000 Gallon Legacy Septic Tank | 44464

1000 Gallons 102'' 60'' 63'' N/A 44464
$2,207.87

1000 Gallon Legacy Septic Tank | 44463

1000 Gallons 102'' 60'' 63'' N/A 44463
$2,023.87

1175 Gallon Low Profile Underground Water Tank | 44405

1175 Gallons 127'' 60'' 51'' N/A 44405
$2,124.95

1250 Gallon Legacy Septic Tank | 44468

1250 Gallons 116'' 55'' 70'' N/A 44468
$2,611.95

1250 Gallon Legacy Septic Tank | 44478

1250 Gallons 116'' 55'' 70'' N/A 44478
$2,207.87

1250 Gallon Legacy Septic Tank | 44467

1250 Gallons 116'' 55'' 70'' N/A 44467
$2,577.87

1250 Gallon Legacy Septic Tank | 44477

1250 Gallons 116'' 55'' 70'' N/A 44477
$2,207.87

1250 Gallon Legacy Septic Tank | 44466

1250 Gallons 116'' 55'' 70'' N/A 44466
$2,577.87

1250 Gallon Legacy Septic Tank | 44476

1250 Gallons 116'' 55'' 70'' N/A 44476
$2,023.87

1425 Gallon Low Profile Underground Water Tank | 44406

1425 Gallons 157'' 60'' 51'' N/A 44406
$2,642.95

1450 Gallon Low Profile Underground Water Tank | 43549

1450 Gallons 157'' 60'' 51'' N/A 43549
$2,642.95

1500 Gallon Legacy Septic Tank | 44471

1500 Gallons 135'' 55'' 70'' N/A 44471
$3,174.95

1500 Gallon Legacy Septic Tank | 44481

1500 Gallons 135'' 55'' 70'' N/A 44481
$2,768.95

1500 Gallon Legacy Septic Tank | 44470

1500 Gallons 135'' 55'' 70'' N/A 44470
$3,141.95

1500 Gallon Legacy Septic Tank | 44480

1500 Gallons 135'' 55'' 70'' N/A 44480
$2,739.95

1500 Gallon Legacy Septic Tank | 44469

1500 Gallons 135'' 55'' 70'' N/A 44469
$2,958.95

1500 Gallon Legacy Septic Tank | 44479

1500 Gallons 135'' 55'' 70'' N/A 44479
$2,557.95

1725 Gallon Low Profile Underground Water Tank | 44407

1725 Gallons 157'' 69'' 51'' N/A 44407
$3,189.95

1750 Gallon Low Profile Underground Water Tank | 43550

1750 Gallons 157'' 69'' 51'' N/A 43550
$3,189.95
  • 1000 Gallon Legacy Septic Tank | 44465
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    1000 Gallon Legacy Septic Tank | 44465

    Norwesco

    $2,207.87 - $2,336.86
    Technical Drawing TANK SUMMARY  PART# #44465 DIMENSIONS 102" Length x 60" Width x 63" Height LIQUID ACCESS 1 Inlet , 1 Outlet , 2 Manway / Lid WEIGHT / SHIP CLASS 395 lbs. / Ship Class 300 CAPACITY (GALLONS) 1000 SHIPS FROM...
    $2,207.87 - $2,336.86
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    Qty in Cart: 0
    Price:
    $2,207.87 - $2,336.86
    Subtotal:
  • 1000 Gallon Legacy Septic Tank | 44464
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    1000 Gallon Legacy Septic Tank | 44464

    Norwesco

    $2,207.87 - $2,336.86
    Technical Drawing TANK SUMMARY  PART# #44464 DIMENSIONS 102" Length x 60" Width x 63" Height LIQUID ACCESS 1 Inlet , 1 Outlet , 2 Manway / Lid WEIGHT / SHIP CLASS 395 lbs. / Ship Class 300 CAPACITY (GALLONS) 1000 SHIPS FROM...
    $2,207.87 - $2,336.86
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    Qty in Cart: 0
    Price:
    $2,207.87 - $2,336.86
    Subtotal:
  • 1000 Gallon Legacy Septic Tank | 44463
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    1000 Gallon Legacy Septic Tank | 44463

    Norwesco

    $2,023.87 - $2,152.86
    Technical Drawing TANK SUMMARY  PART# #44463 DIMENSIONS 102" Length x 60" Width x 63" Height LIQUID ACCESS 1 Inlet , 1 Outlet , 2 Manway / Lid WEIGHT / SHIP CLASS 375 lbs. / Ship Class 300 CAPACITY (GALLONS) 1000 SHIPS FROM...
    $2,023.87 - $2,152.86
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    Qty in Cart: 0
    Price:
    $2,023.87 - $2,152.86
    Subtotal:
  • 1175 Gallon Low Profile Underground Water Tank | 44405
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    1175 Gallon Low Profile Underground Water Tank | 44405

    Norwesco

    $2,124.95
    Technical Drawing Quick Summary  Part# MPN: 44405 Dimensions 127" Length x 60" Width x 51" Height Liquid Access 2 Manways / Lids Weight / Ship Class 359 lbs. / Ship Class 300 Ships From CA, GA, MN, NY, OH, OK, UT, WA Fittings Access 2...
    $2,124.95
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    Qty in Cart: 0
    Quantity:
    Price:
    $2,124.95
    Subtotal:
  • 1250 Gallon Legacy Septic Tank | 44468
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    1250 Gallon Legacy Septic Tank | 44468

    Norwesco

    $2,611.95
    Technical Drawing TANK SUMMARY  PART# #44468 DIMENSIONS 116" Length x 55" Width x 70" Height LIQUID ACCESS 1 Inlet , 1 Outlet , 2 Manway / Lid WEIGHT / SHIP CLASS 459 lbs. / Ship Class 300 CAPACITY (GALLONS) 1250 SHIPS FROM...
    $2,611.95
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    Qty in Cart: 0
    Price:
    $2,611.95
    Subtotal:
  • 1250 Gallon Legacy Septic Tank | 44478
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    1250 Gallon Legacy Septic Tank | 44478

    Norwesco

    $2,207.87 - $2,336.86
    Technical Drawing TANK SUMMARY  PART# #44478 DIMENSIONS 116" Length x 55" Width x 70" Height LIQUID ACCESS 1 Inlet , 1 Outlet , 2 Manway / Lid WEIGHT / SHIP CLASS 379 lbs. / Ship Class 300 CAPACITY (GALLONS) 1250 SHIPS FROM...
    $2,207.87 - $2,336.86
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    Qty in Cart: 0
    Price:
    $2,207.87 - $2,336.86
    Subtotal:
  • 1250 Gallon Legacy Septic Tank | 44467
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    1250 Gallon Legacy Septic Tank | 44467

    Norwesco

    $2,577.87 - $2,706.86
    Technical Drawing TANK SUMMARY  PART# #44467 DIMENSIONS 116" Length x 55" Width x 70" Height LIQUID ACCESS 1 Inlet , 1 Outlet , 2 Manway / Lid WEIGHT / SHIP CLASS 459 lbs. / Ship Class 300 CAPACITY (GALLONS) 1250 SHIPS FROM...
    $2,577.87 - $2,706.86
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    Qty in Cart: 0
    Price:
    $2,577.87 - $2,706.86
    Subtotal:
  • 1250 Gallon Legacy Septic Tank | 44477
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    1250 Gallon Legacy Septic Tank | 44477

    Norwesco

    $2,207.87 - $2,336.86
    Technical Drawing TANK SUMMARY  PART# #44477 DIMENSIONS 116" Length x 55" Width x 70" Height LIQUID ACCESS 1 Inlet , 1 Outlet , 2 Manway / Lid WEIGHT / SHIP CLASS 379 lbs. / Ship Class 300 CAPACITY (GALLONS) 1250 SHIPS FROM...
    $2,207.87 - $2,336.86
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    Qty in Cart: 0
    Price:
    $2,207.87 - $2,336.86
    Subtotal:
  • 1250 Gallon Legacy Septic Tank | 44466
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    1250 Gallon Legacy Septic Tank | 44466

    Norwesco

    $2,577.87 - $2,706.86
    Technical Drawing TANK SUMMARY  PART# #44466 DIMENSIONS 116" Length x 55" Width x 70" Height LIQUID ACCESS 1 Inlet , 1 Outlet , 2 Manway / Lid WEIGHT / SHIP CLASS 435 lbs. / Ship Class 300 CAPACITY (GALLONS) 1250 SHIPS FROM...
    $2,577.87 - $2,706.86
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    Qty in Cart: 0
    Price:
    $2,577.87 - $2,706.86
    Subtotal:
  • 1250 Gallon Legacy Septic Tank | 44476
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    1250 Gallon Legacy Septic Tank | 44476

    Norwesco

    $2,023.87 - $2,152.86
    Technical Drawing TANK SUMMARY  PART# #44476 DIMENSIONS 116" Length x 55" Width x 70" Height LIQUID ACCESS 1 Inlet , 1 Outlet , 2 Manway / Lid WEIGHT / SHIP CLASS 355 lbs. / Ship Class 300 CAPACITY (GALLONS) 1250 SHIPS FROM...
    $2,023.87 - $2,152.86
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    Qty in Cart: 0
    Price:
    $2,023.87 - $2,152.86
    Subtotal:
  • 1425 Gallon Low Profile Underground Water Tank | 44406
    Add to Cart

    1425 Gallon Low Profile Underground Water Tank | 44406

    Norwesco

    $2,642.95
    Technical Drawing Quick Summary  Part# MPN: 44406 Dimensions 157" Length x 60" Width x 51" Height Liquid Access 2 Manways / Lids Weight / Ship Class 445 lbs. / Ship Class 300 Ships From MN, NY, OH, OK, UT, WA Fittings Access 2 Manways /...
    $2,642.95
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $2,642.95
    Subtotal:
  • 1450 Gallon Low Profile Underground Water Tank | 43549
    Add to Cart

    1450 Gallon Low Profile Underground Water Tank | 43549

    Norwesco

    $2,642.95
    Technical Drawing Quick Summary  Part# MPN: 43549 Dimensions 157" Length x 60" Width x 51" Height Liquid Access 2 Manways / Lids Weight / Ship Class 445 lbs. / Ship Class 300 Ships From GA Fittings Access 2 Manways / Lids Additional...
    $2,642.95
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $2,642.95
    Subtotal:
  • 1500 Gallon Legacy Septic Tank | 44471
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    1500 Gallon Legacy Septic Tank | 44471

    Norwesco

    $3,174.95
    Technical Drawing TANK SUMMARY  PART# #44471 DIMENSIONS 135" Length x 55" Width x 70" Height LIQUID ACCESS 1 Inlet , 1 Outlet , 2 Manway / Lid WEIGHT / SHIP CLASS 579 lbs. / Ship Class 300 CAPACITY (GALLONS) 1500 SHIPS FROM...
    $3,174.95
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    Qty in Cart: 0
    Price:
    $3,174.95
    Subtotal:
  • 1500 Gallon Legacy Septic Tank | 44481
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    1500 Gallon Legacy Septic Tank | 44481

    Norwesco

    $2,768.95
    Technical Drawing TANK SUMMARY  PART# #44481 DIMENSIONS 135" Length x 55" Width x 70" Height LIQUID ACCESS 1 Inlet , 1 Outlet , 2 Manway / Lid WEIGHT / SHIP CLASS 474 lbs. / Ship Class 300 CAPACITY (GALLONS) 1500 SHIPS FROM...
    $2,768.95
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    Qty in Cart: 0
    Price:
    $2,768.95
    Subtotal:
  • 1500 Gallon Legacy Septic Tank | 44470
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    1500 Gallon Legacy Septic Tank | 44470

    Norwesco

    $3,141.95
    Technical Drawing TANK SUMMARY  PART# #44470 DIMENSIONS 135" Length x 55" Width x 70" Height LIQUID ACCESS 1 Inlet , 1 Outlet , 2 Manway / Lid WEIGHT / SHIP CLASS 579 lbs. / Ship Class 300 CAPACITY (GALLONS) 1500 SHIPS FROM...
    $3,141.95
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    Qty in Cart: 0
    Price:
    $3,141.95
    Subtotal:
  • 1500 Gallon Legacy Septic Tank | 44480
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    1500 Gallon Legacy Septic Tank | 44480

    Norwesco

    $2,739.95
    Technical Drawing TANK SUMMARY  PART# #44480 DIMENSIONS 135" Length x 55" Width x 70" Height LIQUID ACCESS 1 Inlet , 1 Outlet , 2 Manway / Lid WEIGHT / SHIP CLASS 474 lbs. / Ship Class 300 CAPACITY (GALLONS) 1500 SHIPS FROM...
    $2,739.95
    Choose Options
    Qty in Cart: 0
    Price:
    $2,739.95
    Subtotal:
  • 1500 Gallon Legacy Septic Tank | 44469
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    1500 Gallon Legacy Septic Tank | 44469

    Norwesco

    $2,958.95
    Technical Drawing TANK SUMMARY  PART# #44469 DIMENSIONS 135" Length x 55" Width x 70" Height LIQUID ACCESS 1 Inlet , 1 Outlet , 2 Manway / Lid WEIGHT / SHIP CLASS 555 lbs. / Ship Class 300 CAPACITY (GALLONS) 1500 SHIPS FROM...
    $2,958.95
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    Qty in Cart: 0
    Price:
    $2,958.95
    Subtotal:
  • 1500 Gallon Legacy Septic Tank | 44479
    Choose Options

    1500 Gallon Legacy Septic Tank | 44479

    Norwesco

    $2,557.95
    Technical Drawing TANK SUMMARY  PART# #44479 DIMENSIONS 135" Length x 55" Width x 70" Height LIQUID ACCESS 1 Inlet , 1 Outlet , 2 Manway / Lid WEIGHT / SHIP CLASS 450 lbs. / Ship Class 300 CAPACITY (GALLONS) 1500 SHIPS FROM...
    $2,557.95
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    Qty in Cart: 0
    Price:
    $2,557.95
    Subtotal:
  • 1725 Gallon Low Profile Underground Water Tank | 44407
    Add to Cart

    1725 Gallon Low Profile Underground Water Tank | 44407

    Norwesco

    $3,189.95
    Technical Drawing Quick Summary  Part# MPN: 44407 Dimensions 157" Length x 69" Width x 51" Height Liquid Access 2 Manways / Lids Weight / Ship Class 549 lbs. / Ship Class 300 Ships From CA, MN, NY, OH, OK, UT, WA Fittings Access 2 Manways...
    $3,189.95
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $3,189.95
    Subtotal:
  • 1750 Gallon Low Profile Underground Water Tank | 43550
    Add to Cart

    1750 Gallon Low Profile Underground Water Tank | 43550

    Norwesco

    $3,189.95
    Technical Drawing Quick Summary  Part# MPN: 43550 Dimensions 157" Length x 69" Width x 51" Height Liquid Access 2 Manways / Lids Weight / Ship Class 549 lbs. / Ship Class 300 Ships From GA Fittings Access 2 Manways / Lids Additional...
    $3,189.95
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $3,189.95
    Subtotal:
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