HydroStor® Chamber

High performance stormwater storage chambers

Product Type: Chamber

HydroStor® Chamber


Prinsco offers four sizes of high-performance HydroStor® stormwater chambers designed for site-specific applications such as parking lots, roadways, and commercial developments. HydroStor chambers provide an environmentally sustainable underground water management system that optimizes groundwater recharge and saves valuable land resources. Our four storm chamber models are designed to fit almost any type of performance specifications, project footprint, and construction budget.

Prinsco’s chamber systems can be easily modeled with the HydroCAD Stormwater Modeling System and the Civil 3D Auto CAD Module. Both tools simplify the process of designing a system meeting specific storage and footprint requirements.

Contact your Prinsco sales rep to learn more about HydroStor® Chamber.



  • High performance polypropylene material
  • Meets or exceeds ASTM F2418 product standard & ASTM F2787 design standard
  • Meets AASHTO H20 live load & HL93 design load requirements
  • Advanced injection molding technology for maximum structural performance

System Design

  • Maximum land utilization & minimal environmental impact
  • Smaller footprint with lower installed cost than similar chambers
  • Features integral connectors for simplified assembly
  • Design tool available at Prinsco.com/HydroStor-Resources
  • Available as part of a complete solution with end caps, pipe manifolds & pretreatment options ons


  • Integrated Handles for safe on-site handling
  • Sturdy and lightweight for safe transport and placement by 2 people
  • Specially designed pallet for trouble free handling
  • Maximum stacking density to reduce on-site staging footprint

Available Sizes






Installed Storage Capacity* 164 ft3/chamber 180 ft3/chamber 75 ft3/chamber 31 ft3/chamber
Height 59.5″ 45.5″ 30″ 16″
Width 100.5″ 77.8″ 51″ 34″
Unit Length 51.8″ 88.7″ 85.4″ 87.8″
Installed Length 48.3″ 85.3″ 84.9″ 85.4″
Weight 125 lbs 127 lbs 70 lbs 32 lbs
Chambers/Pallet 10 19 33 45
Material Polypropylene Polypropylene Polypropylene Polypropylene
Mfg. Process Injection Molding Injection Molding Injection Molding Injection Molding
Special Features Integrated Handles Integrated Handles Integrated Handles Integrated Connectors
ASTM Standards Meets or Exceeds Meets or Exceeds Meets or Exceeds Meets or Exceeds

* Assuming 40% void volume of backfill with 9″ bedding & 12″ cover for HS180 and 6″ bedding & 6″ cover for HS75 & HS31

Installation Specifications




HS75 & HS31

Backfill Above Chamber 12″ min. 12″ min. 6″ min.
Bedding 9″ min. 9″ min. 6″ min.
Chamber Spacing 8.5” 5″ 6″
Backfill at Edge of System 12″ 12″ 12″
Minimum Cover 24” 18″ 18″
Maximum burial Depth 8′ 8′ 8′
  • Meets or exceeds ASTM F2418 product standard
  • Meets or exceeds ASTM F2787 design standard
  • Meets AASHTO H20 live load requirement
  • Meets AASHTO HL93 design load requirement

Product Brochures



Installation Guides

CAD Drawings

Engineering Guides

Technical Notes

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