Filter Cleaning

Most Pools in our area use DE Filters (Diatomaceous Earth) pool filters because they are the most cost-effective.
DE Filters are made up of a housing and a filter assembly. The filter assembly is made up filter grids constructed from Polypropylene fabric.  The filtering capability of the fabric is augmented by adding DE to the pump inflow upon installation of the pool.  The DE collects on the grid and ramps up the filtering capability of the filter.  As the filter plugs up with debris, you need to backwash it.  About once a year you need to take it apart and clean it.  Diatomaceous earth consists of fossilized remains of little critters (diatoms) a type of hard-shelled algae.

Cleaning  the D.E. Pool filter requires a few basic hand tools and a garden hose.  It will take you 2-4 hours.   You will also want to make sure that you do this all in one day so that you don’t have the filter away from your swimming pool to long which will degrade the water condition.

The First thing you will want to do is to make sure that the recirculation system is turned off and unplugged.  Make sure that the timer is manually set to the off position. Then make sure that you disconnect the pool pump electric supply.

The next critical step is to make sure that the system is depressurized.  There is an air relief valve at the top of the tank.  Open this valve before you start.  A pressurized system contain a lot of energy and opening the filter under pressure must be avoided. Next remove the backwash valve and loosen the band that holds the filter together.

You can now start to clean the grids.   Remove them from the filter body and use a garden hose to rinse them clean.   After you have cleaned the filter and re-assembled the filter system you will want to retrace the steps you used to relieve the pressure on the filter.  Remember to close the backwach valve and the relief valve.  Then reconnect the pool pump to the electrical service.  After cleaning the filter you will want to restore the system to proper operation.  Make sure to check and adjust the pool chemistry.   Then start up the pump, again follow the manufacturer recommendations.  Finally, add the proper amount of DE to the filter system by following the directions provided with the filter.