Boulder Bags Lift Bags They are economical

They are economical

These bags are very durable and have been used as air jacks capable of exerting several thousand pounds of force over a large area

One good lung full of air at depth and the float will be full when it reaches the surface

Male & female end set (fits 1/4" pipe thread)

with over-pressure valves to vent expanding air as they ascend

Boulder Bags Lift Bags They are economicalBoulder Bags derive their name from gold dredgers and nugget hunters who use them for lifting boulders in the shallow rivers of California's mother lode country. They are designed to get a maximum amount of lift from a single lift point in a minimum depth of water. For example, the 2000 pound Boulder Bag gets its total lift in less than 3 feet of water, whereas the 2000 pound Open Bottom Bag requires almost 8 feet of water. These bags are very durable