In-Ground Fiberglass Pit Systems

SKU Fiberglass-Pit-Sys Category
  • Below ground pre-treatment of wash water
  • Reinforced, pre-fabricated fiberglass
  • Easier and less expensive to install concrete
  • Chemically resistant fiberglass inhibits the growth of bacteria

Water Maze

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Water Maze offers in-ground fiberglass pits, which are easy to install at the job site. As compared to poured-in-place concrete pits that may eventually crack and allow water to leach into the ground, our fiberglass pits immersed into concrete can provide double containment. We offer three sizes of pits. The In-ground Separator (IGS) is uniquely designed with two sets of standing weirs that force solids to the bottom of the pit.


Model Part No Description Inside Dimensions
Collection Pit 8.903-657.0 In-ground Oil Separator Pit 3′ x 9′ x 5′
Catch Basin 8..709-333.0 In-ground Basin 3′ x 3′ x 4.5′
Sump Pit 8.709-334.0 In-ground Sump Pit 2′ x 2′ x 3′


Part No Description
Collection Pit Only  
8.903-674.0 Cover, Hinged Aluminum, Diamond Tread Plate w/Steel Tube Frame, 3′ x 9′
8.903-673.0 Coalescing Grid Packs, 58 Plates, 1,700 sq ft Surface Area
8.712-023.0 Wood Brace Kit (bracing to reinforce fiberglass while pouring concrete, required for installation of Collection Pit #8.903-657.0)
Catch Basin Only  
8.903-678.0 Cover, Aluminum Diamond Tread Plate, 3′ x 3′
8.903-677.0 Grating, Hot Rolled Steel, 1/2″ x 2″ Flatbar, 1.5′ x 3′ (Includes 2 grates)
Sump Pit Only  
8.903-675.0 Cover, Aluminum Diamond Tread Plate w/Steel Tube Frames, 2′ x 2′
8.903-676.0 Grating, Hot Rolled Steel, 1/2″ x 2″ Flatbar, 2′ x 2′


Fiberglass Pit System Product Sheet Product Sheet – Water Maze Fiberglass Pit System
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