A device used to remove particles suspended in the water by pumping water through a porous substance or material.
A device inside a filter tank designed to entrap solids and direct water through a manifold system to exit the filter. Cartridge filter elements and DE filter grids are two examples.
A finely graded material such as sand, diatomaceous earth, polyester fabric, or anthracite coal that removes suspended particles from water passing through it.
The device that pulls water from the pool and pushes it through the filter on its way back to the pool.