Hydrastar Additional Capacity Reservoir


  • Dimensions: 16.4” L x 5.4” W x 7” H
  • Trailer mounted
  • 12 V DC operation
  • Uses DOT 3 or DOT 4 brake fluid
  • Easy to install, 4 12ga wires
    • Black - constant power
    • Blue - brake controller
    • White - ground
    • Yellow - Break-Away
  • Available in 1000, 1200, and 1600 psi for any trailer configuration with 1-3 axles
  • Meets all DOT regulations
  • Complies with CFR-393 braking requirements

For your larger trailer, brake, and/or axle configurations extra brake fluid may be needed. Hydrastar's Additional Capacity Reservoir provides over 1 quart (32oz) of total reservoir capacity with the same compact footprint as the standard Hydrastar. Ideal for applications equipped with long brake line runs and or multi axle trailers requiring higher volumes of brake fluid.

  • Over 1 quart (32oz) total reservoir capacity is the largest in the industry.
  • More fluid translates into better braking performance in larger volume applications
  • Improves fluid displacement is larger volume applications
  • Translucent tank allows fluid check at a quick glance.
  • Translucent tank helps to quickly identify brake system problems associated with brake fluid loss.
  • Meets all DOT regulations and complies with CFR-393 federal braking requirements.
    • Product Model Price  
      Hydrastar Expanded Reservoir, 1000 psi HBA-10ER
      Hydrastar Expanded Reservoir, 1200 psi HBA-12ER
      Hydrastar Expanded Reservoir, 1600 psi HBA-16ER

The Hydrastar Difference

Made in the USA
3 Models (1000 psi, 1200 psi, 1600 psi)
Compatible with factory installed brake controllers
Easy to Install. Replace surge or electric brakes for disc or drum brakes
100% testing of every Hydrastar
Lowest Amp Draw, only 1 Break-Away battery required
Industry leading 2 year warranty
Smallest design on market, only 3" wide - easier to integrate on trailer.
Sealed, enclosed unit made of anodized aluminum for corrosion resistance and a long life.