Fiberglass Square & Rectangular Ribbed Open Top Tanks

These ribbed fiberglass tanks are lightweight, durable, and corrosion-resistant, making them ideal for applications that require long service life and easy handling, like chemical storage, mixing, or containment. Their ribbed design enhances structural integrity, while the fiberglass construction ensures excellent chemical and weather resistance, making the tanks suitable for indoor and outdoor use. The polyester fiberglass version is a cost-effective option with excellent strength and chemical resistance for general-purpose applications. The vinylester fiberglass version is designed for more aggressive chemicals or environments, offering superior corrosion resistance, water resistance, and durability. Custom fittings can be added to the tanks for specialized setups, but must be ordered at the same time as the tank; contact us for a quote. Covers, sold separately and offered in two types (shoebox and bolted flat), protect the tanks from contamination and debris. The loose-fitting shoebox cover is designed for quick removal and easy access; this lightweight cover fits over the tank's top flange, offering reliable protection against debris and evaporation. The bolted flat cover provides a tighter, more secure seal for applications requiring greater containment or protection from contamination. Optional hinges and a centered handle, both sold separately, can be added to either cover style if ordered at the same time for installation before shipment.

  • Polyester fiberglass or vinylester fiberglass tank & cover
  • Ribbed design for extra strength
  • Lightweight, durable & corrosion-resistant
  • For indoor or outdoor use
  • Ideal for storage, mixing, or containment applications
  • Tank images are for reference only; refer to drawings for precise specifications
  • Covers, hinges & handles sold separately
Item # Description Catalog Pg. Price Add to Cart
50 Gallon White Polyester Fiberglass Square Ribbed Open Top Tank - 24" L x 24" W x 24" Hgt. (Cover Sold Separately)
Item 27603
744.94/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
744.94/Each
130 Gallon White Polyester Fiberglass Square Ribbed Open Top Tank - 36" L x 36" W x 25" Hgt. (Cover Sold Separately)
Item 27610
2074.26/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
2074.26/Each
185 Gallon White Polyester Fiberglass Square Ribbed Open Top Tank - 36" L x 36" W x 36" Hgt. (Cover Sold Separately)
Item 27617
2729.29/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
2729.29/Each
235 Gallon White Polyester Fiberglass Square Ribbed Open Top Tank - 48" L x 48" W x 24-3/4" Hgt. (Cover Sold Separately)
Item 27624
2966.9/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
2966.9/Each
400 Gallon White Polyester Fiberglass Rectangular Ribbed Open Top Tank - 72" L x 36" W x 37-1/4" Hgt. (Cover Sold Separately)
Item 27631
7629.16/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
7629.16/Each
475 Gallon White Polyester Fiberglass Square Ribbed Open Top Tank - 48" L x 48" W x 49-1/2" Hgt. (Cover Sold Separately)
Item 27638
6781.47/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
6781.47/Each
535 Gallon White Polyester Fiberglass Rectangular Ribbed Open Top Tank - 96" L x 36" W x 37-1/4" Hgt. (Cover Sold Separately)
Item 27645
8476.84/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
8476.84/Each
715 Gallon White Polyester Fiberglass Rectangular Ribbed Open Top Tank - 96" L x 48" W x 37" Hgt. (Cover Sold Separately)
Item 27652
10172.21/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
10172.21/Each
955 Gallon White Polyester Fiberglass Rectangular Ribbed Open Top Tank - 96" L x 48" W x 49-1/4" Hgt. (Cover Sold Separately)
Item 27659
10737.33/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
10737.33/Each
50 Gallon White Vinylester Fiberglass Square Ribbed Open Top Tank - 24" L x 24" W x 24" Hgt. (Cover Sold Separately)
Item 27606
1021.08/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
1021.08/Each
130 Gallon White Vinylester Fiberglass Square Ribbed Open Top Tank - 36" L x 36" W x 25" Hgt. (Cover Sold Separately)
Item 27613
2819.2/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
2819.2/Each
185 Gallon White Vinylester Fiberglass Square Ribbed Open Top Tank - 36" L x 36" W x 36" Hgt. (Cover Sold Separately)
Item 27620
3692.57/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
3692.57/Each
235 Gallon White Vinylester Fiberglass Square Ribbed Open Top Tank - 48" L x 48" W x 24-3/4" Hgt. (Cover Sold Separately)
Item 27627
4045.77/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
4045.77/Each
400 Gallon White Vinylester Fiberglass Rectangular Ribbed Open Top Tank - 72" L x 36" W x 37-1/4" Hgt. (Cover Sold Separately)
Item 27634
10403.39/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
10403.39/Each
475 Gallon White Vinylester Fiberglass Square Ribbed Open Top Tank - 48" L x 48" W x 49-1/2" Hgt. (Cover Sold Separately)
Item 27641
9440.11/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
9440.11/Each
535 Gallon White Vinylester Fiberglass Rectangular Ribbed Open Top Tank - 96" L x 36" W x 37-1/4" Hgt. (Cover Sold Separately)
Item 27648
11559.33/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
11559.33/Each
715 Gallon White Vinylester Fiberglass Rectangular Ribbed Open Top Tank - 96" L x 48" W x 37" Hgt. (Cover Sold Separately)
Item 27655
13871.2/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
13871.2/Each
955 Gallon White Vinylester Fiberglass Rectangular Ribbed Open Top Tank - 96" L x 48" W x 49-1/4" Hgt. (Cover Sold Separately)
Item 27662
14641.81/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
14641.81/Each
White Polyester Fiberglass Shoebox Cover for 24" L x 24" W (50 Gallon) Square Ribbed Open Top Tanks
Item 27604
321.1/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
321.1/Each
White Polyester Fiberglass Shoebox Cover for 36" L x 36" W (130 Gallon) Square Ribbed Open Top Tanks
Item 27611
770.63/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
770.63/Each
White Polyester Fiberglass Shoebox Cover for 36" L x 36" W (185 Gallon) Square Ribbed Open Top Tanks
Item 27618
770.63/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
770.63/Each
White Polyester Fiberglass Shoebox Cover for 48" L x 48" W (235 Gallon) Square Ribbed Open Top Tanks
Item 27625
1316.49/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
1316.49/Each
White Polyester Fiberglass Shoebox Cover for 72" L x 36" W (400 Gallon) Rectangular Ribbed Open Top Tanks
Item 27632
1573.36/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
1573.36/Each
White Polyester Fiberglass Shoebox Cover for 48" L x 48" W (475 Gallon) Square Ribbed Open Top Tanks
Item 27639
1316.49/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
1316.49/Each
White Polyester Fiberglass Shoebox Cover for 96" L x 36" W (535 Gallon) Rectangular Ribbed Open Top Tanks
Item 27646
2697.18/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
2697.18/Each
White Polyester Fiberglass Shoebox Cover for 96" L x 48" W (715 Gallon) Rectangular Ribbed Open Top Tanks
Item 27653
3403.58/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
3403.58/Each
White Polyester Fiberglass Shoebox Cover for 96" L x 48" W (955 Gallon) Rectangular Ribbed Open Top Tanks
Item 27660
3403.58/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
3403.58/Each
White Polyester Fiberglass Bolted Flat Cover for 24" L x 24" W (50 Gallon) Square Ribbed Open Top Tanks
Item 27605
899.07/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
899.07/Each
White Polyester Fiberglass Bolted Flat Cover for 36" L x 36" W (130 Gallon) Square Ribbed Open Top Tanks
Item 27612
899.07/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
899.07/Each
White Polyester Fiberglass Bolted Flat Cover for 36" L x 36" W (185 Gallon) Square Ribbed Open Top Tanks
Item 27619
1444.93/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
1444.93/Each
White Polyester Fiberglass Bolted Flat Cover for 48" L x 48" W (235 Gallon) Square Ribbed Open Top Tanks
Item 27626
1573.36/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
1573.36/Each
White Polyester Fiberglass Bolted Flat Cover for 72" L x 36" W (400 Gallon) Rectangular Ribbed Open Top Tanks
Item 27633
1830.23/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
1830.23/Each
White Polyester Fiberglass Bolted Flat Cover for 48" L x 48" W (475 Gallon) Square Ribbed Open Top Tanks
Item 27640
1573.36/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
1573.36/Each
White Polyester Fiberglass Bolted Flat Cover for 96" L x 36" W (535 Gallon) Rectangular Ribbed Open Top Tanks
Item 27647
2954.06/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
2954.06/Each
White Polyester Fiberglass Bolted Flat Cover for 96" L x 48" W (715 Gallon) Rectangular Ribbed Open Top Tanks
Item 27654
3660.46/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
3660.46/Each
White Polyester Fiberglass Bolted Flat Cover for 96" L x 48" W (955 Gallon) Rectangular Ribbed Open Top Tanks
Item 27661
3660.46/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
3660.46/Each
White Vinylester Fiberglass Shoebox Cover for 24" L x 24" W (50 Gallon) Square Ribbed Open Top Tanks
Item 27607
401.37/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
401.37/Each
White Vinylester Fiberglass Shoebox Cover for 36" L x 36" W (130 Gallon) Square Ribbed Open Top Tanks
Item 27614
963.28/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
963.28/Each
White Vinylester Fiberglass Shoebox Cover for 36" L x 36" W (185 Gallon) Square Ribbed Open Top Tanks
Item 27621
963.28/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
963.28/Each
White Vinylester Fiberglass Shoebox Cover for 48" L x 48" W (235 Gallon) Square Ribbed Open Top Tanks
Item 27628
1645.61/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
1645.61/Each
White Vinylester Fiberglass Shoebox Cover for 72" L x 36" W (400 Gallon) Rectangular Ribbed Open Top Tanks
Item 27635
1966.7/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
1966.7/Each
White Vinylester Fiberglass Shoebox Cover for 48" L x 48" W (475 Gallon) Square Ribbed Open Top Tanks
Item 27642
1645.61/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
1645.61/Each
White Vinylester Fiberglass Shoebox Cover for 96" L x 36" W (535 Gallon) Rectangular Ribbed Open Top Tanks
Item 27649
3371.48/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
3371.48/Each
White Vinylester Fiberglass Shoebox Cover for 96" L x 48" W (715 Gallon) Rectangular Ribbed Open Top Tanks
Item 27656
4254.47/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
4254.47/Each
White Vinylester Fiberglass Shoebox Cover for 96" L x 48" W (955 Gallon) Rectangular Ribbed Open Top Tanks
Item 27663
4254.47/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
4254.47/Each
White Vinylester Fiberglass Bolted Flat Cover for 24" L x 24" W (50 Gallon) Square Ribbed Open Top Tanks
Item 27608
1123.83/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
1123.83/Each
White Vinylester Fiberglass Bolted Flat Cover for 36" L x 36" W (130 Gallon) Square Ribbed Open Top Tanks
Item 27615
1123.83/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
1123.83/Each
White Vinylester Fiberglass Bolted Flat Cover for 36" L x 36" W (185 Gallon) Square Ribbed Open Top Tanks
Item 27622
1806.15/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
1806.15/Each
White Vinylester Fiberglass Bolted Flat Cover for 48" L x 48" W (235 Gallon) Square Ribbed Open Top Tanks
Item 27629
1966.7/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
1966.7/Each
White Vinylester Fiberglass Bolted Flat Cover for 72" L x 36" W (400 Gallon) Rectangular Ribbed Open Top Tanks
Item 27636
2287.78/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
2287.78/Each
White Vinylester Fiberglass Bolted Flat Cover for 48" L x 48" W (475 Gallon) Square Ribbed Open Top Tanks
Item 27643
1966.7/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
1966.7/Each
White Vinylester Fiberglass Bolted Flat Cover for 96" L x 36" W (535 Gallon) Rectangular Ribbed Open Top Tanks
Item 27650
3692.57/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
3692.57/Each
White Vinylester Fiberglass Bolted Flat Cover for 96" L x 48" W (715 Gallon) Rectangular Ribbed Open Top Tanks
Item 27657
4575.57/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
4575.57/Each
White Vinylester Fiberglass Bolted Flat Cover for 96" L x 48" W (955 Gallon) Rectangular Ribbed Open Top Tanks
Item 27664
4575.57/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
NEW
4575.57/Each
Hinges for 24" L x 24" W (50 Gallon) Fiberglass Square Ribbed Open Top Tank Covers (Installed)
Item 27609
83.48/Each
NEW
83.48/Each
Hinges for 36" L x 36" W (130 Gallon) Fiberglass Square Ribbed Open Top Tank Covers (Installed)
Item 27616
122.02/Each
NEW
122.02/Each
Hinges for 36" L x 36" W (185 Gallon) Fiberglass Square Ribbed Open Top Tank Covers (Installed)
Item 27623
122.02/Each
NEW
122.02/Each
Hinges for 48" L x 48" W (235 Gallon) Fiberglass Square Ribbed Open Top Tank Covers (Installed)
Item 27630
147.71/Each
NEW
147.71/Each
Hinges for 72" L x 36" W (400 Gallon) Fiberglass Rectangular Ribbed Open Top Tank Covers (Installed)
Item 27637
122.02/Each
NEW
122.02/Each
Hinges for 48" L x 48" W (475 Gallon) Fiberglass Square Ribbed Open Top Tank Covers (Installed)
Item 27644
147.71/Each
NEW
147.71/Each
Hinges for 96" L x 36" W (535 Gallon) Fiberglass Rectangular Ribbed Open Top Tank Covers (Installed)
Item 27651
122.02/Each
NEW
122.02/Each
Hinges for 96" L x 48" W (715 Gallon) Fiberglass Rectangular Ribbed Open Top Tank Covers (Installed)
Item 27658
147.71/Each
NEW
147.71/Each
Hinges for 96" L x 48" W (955 Gallon) Fiberglass Rectangular Ribbed Open Top Tank Covers (Installed)
Item 27665
147.71/Each
NEW
147.71/Each
Centered Handle for Fiberglass Ribbed Open Top Tank Covers (Installed)
Item 27666
37.25/Each
NEW
37.25/Each