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Fiberglass septic tanks from Loomis Tank Centers and Orenco

Loomis, Glas-tec & Orenco fiberglass septic tanks offer a strong, rigid, easy-to-handle septic tank solution with the same non-corrosive properties as polyethylene as well as added flexibility in the molding process to accommodate a wide range of plumbing.

Fiberglass Septic Tanks

General Information:

  • Sizes range from 750 gallon to 40,000 gallon
  • Loomis and Orenco tanks have IAPMO Certification
  • Non-corrosive for long life
  • Lightweight for easy installation
  • Two piece tanks can be shipped unassembled and nested together for economical shipping

Click on a pdf logo below for a PDF drawing. Get free Adobe Reader here.
Tank dimensions and fitting placement may vary slightly. Specifications are subject to change without notice.

Loomis Fiberglass Septic Tanks
Loomis Fiberglass Septic Tanks
Type Capacity Weight Inlet Outlet L X W X H Comp PDF
Ribbed 750 gallon 320 lbs 54" 52" 93.5" x 71.5" x 67" 2
Ribbed 1000 gallon 370 lbs 54" 52" 115" x 72.5" x 67" 2
Ribbed 1250 gallon 430 lbs 54" 52" 142" x 75" x 68" 2
Ribbed 1500 gallon 470 lbs 54" 52" 161" x 75" x 68" 2
*Inlet and outlet are from bottom of tank to bottom of hole

Loomis Fiberglass (install | operation | warranty | IAPMO listing)

Available Accessories

  • Extra Fiberglass Lids
  • Fiberglass Risers (24" Diameter x 24" Height)
  • Septic Tank Effluent Filters
  • 4-Hole or 6-Hole Distribution Boxes
  • Diverter valves
  • Other accessories for fiberglass on site tanks

Glas-Tec Fiberglass Septic Tanks
Glas-Tec Fiberglass Septic Tanks
Type Capacity Inlet Outlet L X W X H Comp
Horizontal 1050 gallon 55" 52.5" 111" x 67" x 67" 2
Horizontal 1250 gallon 55" 52.5" 131" x 67" x 67" 2
Horizontal 1550 gallon 55" 52.5" 161" x 67" x 67" 2
*Inlet and outlet are from bottom of tank to bottom of hole

Glas-Tec

Glas-Tec septic tanks are approved by and distributed within the state of Arizona. These fiberglass septic tanks are available in standard sizes along with custom larger sizes. Please call for custom quotes.

Available Accessories

  • Extra Fiberglass Lids
  • Fiberglass risers
  • Septic Tank Effluent Filters
  • 4-Hole or 6-Hole Distribution Boxes
  • Diverter valves
  • Other accessories for fiberglass on site tanks


Orenco Systems Fiberglass Septic Tanks
Orenco Systems Fiberglass Septic Tanks
Type Capacity Weight Inlet Outlet L X W X H Comp PDF
Ribbed 1000 gallon 350 lbs 54" 52" 121" x 72" x 65" 2
Ribbed 1500 gallon 500 lbs 54" 52" 168" x 72" x 65" 2
*Inlet and outlet are from bottom of tank to bottom of hole

Orenco Systems (install | warranty | IAPMO listing)

Orenco's septic tanks are known in the onsite industry for strength and watertightness. These injection-molded fiberglass-reinforced polyester (FRP) tanks are available in 1000-gal and 1500-gal sizes for residential, commercial, and community systems. These tanks can be buried up to 4' deep.

Available Accessories

  • Fiberglass Lids
  • Ultra Rib Riser Pipe
  • Riser Lid Adapters
  • Inlet/Outlet Plumbing
  • Epoxy and Adhesive Kits
  • Septic Tank Effluent Filters