Excellent choice for smaller pools that do not receive regular usage Easily the least expensive type of filter, and by far the easiest to install Some benefits of cartridge filters include Cartridge filters are not cleaned through backwashing like the other filters, but through disassembling the filter and manually rinsing the waste buildup off of the cartridge. Cartridge units are made of finely pleated sheets which collect debris as water is pushed through. Like sand filters, a backwash valve and additional plumbing work is needed when converting from a cartridge filterĬartridge filters are the simplest type of pool filter, consisting only of a single or multiple cartridge units. This can require the purchase of special tools, and the grids can be torn during this process if not done carefully. The filter must be disassembled and the grids cleaned once per season. DE filters are typically the most expensive filter option This can add an additional cost to pool maintenance if the pool is used heavily and regular backwashing is required. DE filter media must be added to filter after each backwash. Grids can last several years if cared for properly Can go months without needing to be back washed or cleaned Greatest filtration ability, down to as little as 2-3 microns DE filters, like sand filters, are cleaned through a backwash process, which flushes all material, including the DE, off of the grids and through a waste pipe. Lateral units on a sand filter can crack with age, resulting in a spilling of media back into the pool.ĭE filters work by pushing water through a filter consisting of 7 grid units coated in a fine powder known as diatomaceous earth, or DE. Sand filters must be back washed much more frequently than a DE filter. When converting from a cartridge filter, a new multiport unit, as well as a new filter, must be installed, often requiring the plumbing to be adjusted, resulting in a very high cost to convert. Replacing the sand can be a very challenging physically, and may require the assistance of a hired professional with special equipment Silica sand has the lowest micron filtration ability compared to Cartridge and DE filters While the sand filter may be the easiest to maintain, they have definite drawbacks. Recycled glass media can be used in lieu of sand, which increases filtration ability from 20 microns to 3 microns. Filter sand can last up to 5 years before needing to be replaced. The easiest type of filter to clean – no filter disassembly is required to clean, and no loss of media occurs during backwash process. Silica sand, the most common media used in sand filters, can filter particles down to 20 microns. Sand filters are cleaned by a process known as “backwashing”, where the water flow is reversed by turning a multiport valve, and the dirt/waste particles are pushed to the top of the sand and then flushed out through a waste pipe. Sand filters work by pushing the water through a large body of sand located within the filter. Each of the three main types of pool filters has their own benefits and drawbacks. When building a new pool or replacing existing equipment, choosing a new pool filter may seem like a daunting task at first with so many options on the market.
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