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Water Bags for Proof Load Testing

Serving Virginia
Hydro-Wates® provides proof load testing services and water bags to buy or rent to companies across the U.S. and throughout the world
Water Bag Equipment
353 Metric Ton Slewing Test on Offshore Crane

Hydro-Wates® owns and maintains an extensive inventory of water bag equipment to enable proof load testing of vessel and offshore cranes, winches, hoists, drilling derricks, pad-eyes, bridge cranes, platforms, walkways, and other mechanical structures. All of our water bag equipment is available for sale or rental. Our load test water bags have undergone extensive design verification and inspection prior to being released for field use. The minimum design safety factor for our water bags is 6:1 and each water bag is proof load tested to a minimum of two times is rated working load capacity.  All of our water bags are manufactured in accordance with EN ISO 9001:2008.

Water Bags for Sale

  • 1 ton
  • 2 ton
  • 5 ton
  • 12 ton
  • 20 ton
  • 35 ton
  • Ancillary proof load testing equipment is also available


Using water bags for your proof load testing requirements has many advantages:

1.  Since water bags are constructed from a light weight and pliable PVC fabric, they can be rolled up and packaged into containers that allow for economical shipping to your worksite – across the U.S. and worldwide. The packaged weight of water bags is approximately 1% of its weight when filled with water.

2.  Application of test loads occurs gradually as the water bag is filled with load water.  This prevents shock loading and allows for the early identification of technical problems with the equipment being tested.  It is also possible for the operator to stage up to the final proof-load using intermediate hold points and test hoisting/braking capability of equipment prior to reaching full test load.

3.  Accurate selection of test loads can be achieved using force dynamometers or water meters.  This allows for an infinite number of test loads to be achieved to meet equipment specific requirements.

4.  Release of test fluid is performed by draining water from the water bags, avoiding the need to lower the test load in critical or hazardous areas.

5.  Because of their compact size, water bags and load measurement equipment can, in many cases, be transported by pick-up truck and small commercial trailers.

6.  Water bags are accepted for proof load testing by US Occupational Health & Safety Administration, UK Health & Safety Executive, American Bureau of Shipping, Det Norske Veritas, Lloyds Register, and other classification and certification organizations. 

Load Test Water Bags
Meter Run Used to Evenly Fill Water Bags

In addition to water bags, Hydro-Wates® maintains an extensive inventory of ancillary equipment also available for sale or rental, including:

  • Water Pumps (gasoline and air operated)
  • Water Meters (Digital & Analog)
  • Water hoses for fill and drain
  • Manifolds, for simultaneous filling of multiple water bags
  • Load Cells, including tension link, shackle pin, and threaded ends.
  • Master Links & Pear Shaped Links
  • Shackles, all sizes
  • Lifting Beams, various capacities
  • Shipping Containers (fully enclosed) for offshore, domestic & international shipping

Contact one of our sales representatives today
to inquire about a quote from Hydro-Wates®
or call us today at 877-643-9990