Pool filters rely on adequate pressure to suck the water from the pool skimmer through the filter and back out the return jet. Occasionally pool owners will encounter the problem of a low pressure reading on the filter gauge. This gauge helps determine if the filter is operating normally or if something needs cleaning. Pool filter pressure is usually high when the filter is dirty. It's possible also for the pressure to be lower than normal. With a few simple remedies you can restore pressure to its normal range.
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Fill the water up to the proper level with a garden hose. Pool pressure is affected by low water levels. Raise the water level up to the halfway point of the pool skimmer height.
Clean out the skimmer basket of the pool. This is located on the side of the pool and connects to the filter via a hose. Open the skimmer, remove the basket and clean it free of dirt and debris.
Turn the filter off and open the pool pump. There's another basket inside the pool pump that's accessed by turning the top of the pump. This basket has the potential to become clogged during vacuuming because the pool's skimmer basket is removed during the process.
Inspect pool hoses for cracks and leaks. Replace the hoses as necessary. Filter pressure can become lowered due to cracked hoses.