Pool Fountain - Gold Medal Pools & Outdoor Living

5. Your Swimming Pool Diatomaceous Earth (DE) Filter!

D.E. Filter Diatomaceous Earth (DE) is a fossil material ground into a very fine white powder. DE filters contain internal elements inside them. 

 
The DE powder coats the internal element. Water passes through the DE coated element which strains dirt, algae and some forms of bacteria from the water. 
 
Filtration starts as soon as the filter has been pre-coated. As the filter removes dirt from the pool water, the accumulated dirt causes a resistance to flow. As a result, the gauge pressure will rise and the flow will decrease. When the pressure rises 8-10 psi above the pre-coat pressure, it is time to backwash (clean) the filter. Once your filter is running and there is a pressure reading, line up the green arrow with the current reading. (See Fig 3) When the pressure rises to or above the red or second arrow, it is time to clean your filter. Note: During initial clean-up of the pool, particularly with a new pool or a very dirty pool, it may be necessary to backwash more frequently due to the heavy initial dirt load in the water.
 
Once backwashing is complete new D.E. is added through the skimmer to re-coat the internal elements in the tank.  
 
This process is called “charging” the filter. The amount of D.E. used to charge your filter can be found in your filter owner’s manual and on the filter tank itself. 
 
When you find the pressure remains high and flow is still diminished after backwashing, it may be time to have the filter manually cleaned. Most filter manufacturers recommend a complete manual chemical cleaning of your D.E. elements 2 times yearly to maintain optimum performance and flow. 
 
You should refer to the cleaning instructions from your filter operating manual or call for service.
 
Back Wash Valve Operation FILTER POSITION
This is the process by which the water from the pool passes through the filter tank. As the water trickles passes through the media, the dirt and debris are trapped by the media, thus filtering the water. For normal filtration and vacuuming pool thru filter. The filter should be operated a minimum of 6 to 12 hours a day.
 
BACKWASH POSITION
This process is used to clean the debris that has accumulated, out of the media. The water is essentially moving in a reverse fashion. 
 
POOL OR SPA BOOST
Water is passed from the skimmer to the pump and then up to the valve, however, instead of passing through the filter, it passes through the valve head and then back into the pool. Re-circulate is used to circulate chemicals without filtering, this will simply circulate the water throughout the pool. 
 
WASTE POSITION
this function is used when one desires to draw water or vacuum debris from the pool (bypassing the tank) for vacuuming directly to waste, lowering water level or draining pool. For example, if there is a lot of debris accumulated on the floor of the pool, you would use this process to vacuum it from the pool, bypassing the filter tank.
 
 
d. Shut off the pump. (Must shut pump off before moving valve)
 
 
 
 
e. Set Filter Control valve to FILTER.
 
 
 
 
 
f.  Charge filter with fresh D.E. powder.
 
 
 
 
D.E. 48 FILTER REQUIRES 6.0 LBS. or ( 5 - ORANGE D.E. SCOOPS)
D.E. 60 FILTER REQUIRES 7.5 LBS. or ( 6 - ORANGE D.E. SCOOPS)
D.E. 72 FILTER REQUIRES 9.0 LBS. or ( 7 - ORANGE D.E. SCOOPS)
 
To charge filter with D.E., be sure backwash valve is in filter position, with pump running, 
 
 
 
add D.E. directly to skimmer closest to filtration system.  Add the exact amount of D.E. slowly, one container at a time.  The D.E. will be drawn into the filter, coating the elements. 
 
 
 
Once you have the DE powder in the filter, open the manual air relief valve on top of the filter. Once all of the air is released through the manual air relief valve and only water flows out close it. 
 
 
 
Your filter is now operating correctly, until pressure builds from dirt accumulation, and backwashing is required again.