Problems With Swimming Pool Filters

Filters ensure that any particles or debris are removed from the pool.Swimming-belt in swimming-pool. image by Saskia Massink from Fotolia.com

A swimming pool filter should efficiently and effectively remove any particles or debris that collect in the pool before the water is passed through the cleaning and purification systems, after which the water is returned to the pool. Three main types of swimming pool filters are available: cartridge filters, sand filters and diatomaceous earth filters. Whichever type of pool filter is used, regular maintenance is required to minimize the possibility of filtration problems.

Low Flow

Low flow is usually the result of too high or too low pressure. High pressure is often caused by a clogged, resulting from long periods of use with no maintenance. The problem is rectified by cleaning the filter or replacing it. Regular cleaning prevents the filter from becoming clogged. Low pressure also causes low flow. Low pressure is commonly the result of air leaks or blocked components of the pump.

Sand and diatomaceous earth filters require regular backwashing to operate at maximum efficiency. After performing a backwash, a small amount of filter media is sometimes present in the pool, which is common and is not a problem. If, however, there are copious amounts of filter media in the pool, especially laying at the bottom of the pool under the filter outlet, or filter media is continually injected into the pool, the filter is not working efficiently. Where a sand filter is used, the lateral or standpipe is probably cracked and will require replacement. Where a diatomaceous earth filter is causing filter media to deposit in the pool, the most common cause is a tear in the fabric lining of the filter, which contains the filter media. Sew the fabric together to patch the tear, or replace the filter media.

Leaks commonly occur as a result of a faulty valve or damaged seals around the valves. Identify the source of the leak, and clean and reseal the valves. If the filter is a split-tank style, leaks are common around the belly band. Remove the band, and clean the O-ring. After cleaning, apply lubricant, and replace the band. When replacing the belly band, ensure that the band securely attaches to both halves of the tank. Drain plugs are another source of leaks. Remove old sealant, and add new sealant if necessary. When replacing drain plugs, it is vital not to over tighten them as this may cause cracks or splits in the under drain assembly.