D.E. Filters

Diatomaceous earth is a porous powder with microscopic openings that when magnified look like tiny sponges. Clear water can pass through these openings, but particles, as small as two to five microns, are trapped during the first pass through the media. D.E. filters have internal elements that become coated with D.E. It is this ‘filter [...]

How Sand Filters Work

Sand is the oldest and most popular method of filtration.  All sand filters share two things in common:

When in the filtration mode, water flows from top to bottom
They all have some sort of lateral or underdrain with slots to hold back sand while allowing clean, filtered water to pass through.

High-rate sand filters use a special [...]