This 3/8" Direct Burial Tubing is specifically designed to allow installations of the pump from a distance from the pond. In settings where electricity is not available pond side, the tubing can be buried and run up to 1/4 mile away from the pond itself. It's less expensive than weighted airline or running power to a pond in most cases. The burial tubing should be used on land only, and then transition to weighted line at the pond's edge.
Available in 100 foot lengths and 3/8' in diameter. For longer runs than 300' please consider using the 5/8" tubing available here.