The filter grids will get clogged with algae and calcium deposits over time, so once or twice a year, you may need to deep clean them using muriatic acid diluted in water. Step 9: If necessary clean the grids with a muriatic acid solution Make sure to get in there and clean off all the DE, debris, and algae from the filter grids. Step 8: Wash each filter gridĮach filter grid should be removed from the manifold and washed using a garden hose. ![]() When it is dirty, you will see plenty of grime and debris on each filter grid. Remove the top of the filter and take out the manifold, which holds each of the filter grids. Some models will have bolts that need to be unscrewed with a wrench, while others have a single clamp that needs to be released. Once the water in the filter has drained, you need to take off the top of the filter. Step 6: Remove the clamps or bolts holding the filter cover Then open the air release valve and the drain plug, and drain any remaining water from the filter. ![]() Step 4: Turn the pump offĪfter the backwash is completed, turn your pump off once again. Continue backwashing until the wastewater is clear. Once the filter is turned off, change the mode of your filter to backwash using the multiport valve and start the pool pump. It is imperative to ensure that your pump is switched off before you turn the filter to backwash mode. Read my article on what to do when your DE filter pressure rises fast for more tips on common problems. The pressure gauge is located on the top of the machine and will read the internal pressure of the filter. When the pressure is 8-10 psi over the usual readings, it is likely time to clean the filter. Your pressure gauge will tell you when to clean your pool. Doing so will maximize the filter’s lifespan and keep your pool nice and clean. I recommend you clean your DE filter every 1-2 months.
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