Jandy DEV48 User Manual (English)

Questions and Answers:

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Rachel BrownAug 9, 2025
How to fix low water flow in Jandy Swimming Pool Filter?
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  Timothy JohnsonAug 9, 2025
  Low water flow in your Jandy Swimming Pool Filter can stem from several issues. The filter system strainer baskets might be dirty; check and clean the skimmer and pump baskets. Air leaks on the suction side of the pump could be the cause; inspect all connections between the pool intake and pump. Restrictions or blockages in the suction or return lines should be checked for debris or partially closed valves. Additionally, ensure the pool water level is above the pump inlet line, and that the pump is primed by filling it with water at the basket and replacing the lid. If the pump impeller vanes are blocked or the pump is operating under speed due to low voltage, a technician or electrician is required.
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James ColeAug 14, 2025
Why Jandy Swimming Pool Filter has short filter cycles?
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  Jonathan WilliamsAug 14, 2025
  Short filter cycles in your Jandy Swimming Pool Filter can be caused by algae clogging the filter, so check the disinfectant content. Incorrect water chemistry, such as pH, total alkalinity, and TDS, can also be a factor. Ensure strainer baskets are being used and are not broken; replace them if necessary. Check the pump performance, as the pump output might exceed the design flow rate of the filter. Ineffective cleaning may also be to blame, so clean or replace the filter grids per instructions.
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riveraashleyAug 21, 2025
What to do if Jandy DEV48 Swimming Pool Filter has high pressure on start-up?
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  James BergerAug 21, 2025
  High pressure on start-up in your Jandy Swimming Pool Filter can be due to a small eyeball fitting in the Pool/Spa, which you should replace with a larger diameter fitting. A partially closed valve on the return line can also cause this; check and fully open all valves on the return line. The pump might be too large, so check the pump and filter selection. Dirty filter grids can also contribute; clean the filter grids per instructions.
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zherringAug 27, 2025
Why is the water not clear in my Jandy DEV48 Swimming Pool Filter?
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  Ronald ThompsonAug 27, 2025
  If the water in your Jandy Swimming Pool Filter isn't clear, it could be due to several reasons. The disinfectant level might be insufficient, so check and adjust it. The pool chemistry might be incorrect, requiring you to test and adjust it. Heavy use or dirt loads may necessitate adjusting the filter time or water chemistry. Insufficient running times can be resolved by increasing pump run time. A dirty filter needs backwashing according to instructions, and a hole in the filter element requires replacing the filter grids.
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garciajamesSep 1, 2025
Why does dirt return to pool from Jandy DEV48 Swimming Pool Filter?
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  patriciaandersonSep 1, 2025
  If dirt returns to the pool from your Jandy Swimming Pool Filter, it could be due to a hole in the filter grid fabric, requiring you to replace the filter grid per instructions. A worn o-ring seal inside the filter might also be the cause, so replace the o-ring. Alternatively, a cracked manifold could be the issue, in which case you should replace the manifold assembly.