Jet Filter Weep Holes

The Jet Filter Weep Hole system is designed uniquely to prevent erosion of backfill materials caused by transport of material fines through the walls weep hole.

Historically the build up excessive hydrostatic water pressure beyond the sheet pile walls can cause stability issues. The Jet Filter System relieves this pressure whilst preventing loss of material fines, has an unlimited design lift and finally provides an aesthetically acceptable solution.

Generally the systems is installed at the time of construction of the wall but can be fitted to existing structures. The location of the Jet Filter system may be chosen by the designer of the wall to optimise relieving the hydrostatic pressure on the wall.

Relieving hydrostatic pressure is important since the design of most walls does not account for the fact that the wall will be subject to pressure from perched or trapped water within the backfill material.

The Jet Filter is a two component system consisting of an ABS plastic cylinder which is permanently installed and a replaceable filter element tube which can be inserted, lock in and removed for maintenance/replacement purposes by the filter assembly tool.

The Jet Filter installation is quick and easy. Simply drill a 2.5 inch (65mm) diameter core hole where directed on the sheet pile. The four self drilling stainless steel screws make installation both fast and easy. The Jet Filters should be installed approximately 1.2m to 2.4m apart, slightly above the mean high water line.

The filter fabric provided with the system (Mirafi Filterweave 300) resists clogging while maintaining flow in dynamic conditions.

The unique Jet Filter Weep Hole system is suitable for the following applications:

  • Retaining Walls
  • Seawalls
  • Bulkheads
  • Shoring
  • Erosion Control Weep Hole Drains

The Jet Filters can be fitted to a wide range of materials, including steel, vinyl, composite, aluminium and wood.

Further information on the product can be found at