The filter screen only needs to be placed 1 to 1.5 metres deep in the sand underneath the clay layer. This is a great advantage over traditional seepage screens that need to be placed very deep in the ground. The Prolock Delta Filter Screen allows water to filter through, while holding back soil. The filter is easy to replace once it becomes clogged.
The filter screen is made entirely from recycled plastic, and is in line with the cradle-to-cradle principle. This makes it a sustainable and economically viable alternative to wood and steel: CO2 emissions during the production process are considerably reduced, while the seepage screen does not wear or rot.