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418 products found
Waterco Opal Cartridge Element | 90sq. ft. 30 Micron | 701041
Waterco Opal Cartridge Element | 90sq. ft. 30 Micron | 701041
$97.57
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Waterco Multiport Valve for use with Sand Filters | Valve with Piping Kit | 2" Side Mount Valve & Filter Connections with Sweep Elbows 2290590P | 2290590
Waterco Multiport Valve for use with Sand Filters | Valve with Piping Kit | 2" Side Mount Valve & Filter Connections with Sweep Elbows 2290590P | 2290590
$203.22
★★★★★ (1)
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Hayward Pro Series Vari-Flo Control Backwash Valve | SP0715X62
Hayward Pro Series Vari-Flo Control Backwash Valve | SP0715X62
$283.70
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DiversiTech 3" UltraLite Lightweight Concrete Equipment Pad | 24"x36"X3" | UC2436-3
DiversiTech 3" UltraLite Lightweight Concrete Equipment Pad | 24"x36"X3" | UC2436-3
$118.05
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Waterway ProClean Plus Single Cartridge Filter | 75 Sq. Ft. 75 GPM | PCCF-075
Waterway ProClean Plus Single Cartridge Filter | 75 Sq. Ft. 75 GPM | PCCF-075
$341.73
★★★★★ (24)
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Waterco Trimline C50 Leaf Trapper | 3761053NA
Waterco Trimline C50 Leaf Trapper | 3761053NA
$232.40
★★★★★ (1)
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Hayward Pro Series Sand Filter 1.5" Top Mount Valve 18" Tank | W3S180T
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Hayward Pro Series Sand Filter 1.5" Top Mount Valve 18" Tank | W3S180T
$499.00
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★★★★★ (26)
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AquaStar PipeLine Filter | 27,000 Gallon Pool | PLF27000
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AquaStar PipeLine Filter | 27,000 Gallon Pool | PLF27000
$930.00
★★★★★ (6)
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Replacement Filter Cartridge for Jandy CS100 | R0462200 C-8410 XLS-828 PC-0821 PJANCS100 FC-0821
Replacement Filter Cartridge for Jandy CS100 | R0462200 C-8410 XLS-828 PC-0821 PJANCS100 FC-0821
$73.65
★★★★★ (9)
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Waterway 2" FPT Multiport Valve with Union Connections for D.E. Filters | WVD001
Waterway 2" FPT Multiport Valve with Union Connections for D.E. Filters | WVD001
$156.23
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Hayward Perflex with Clamp Modular Above Ground Pool DE Filter | 20 Sq Ft | W3EC40AC
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Hayward Perflex with Clamp Modular Above Ground Pool DE Filter | 20 Sq Ft | W3EC40AC
$569.00
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Diatomaceous Earth DE Powder 25lb Bag | DEC25
Diatomaceous Earth DE Powder 25lb Bag | DEC25
$137.15
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Replacement Cartridge for Sta-Rite System 3 100 Sq Ft Inner S7M120 (300 Sq Ft Filter ) | 25021-0200S
Replacement Cartridge for Sta-Rite System 3 100 Sq Ft Inner S7M120 (300 Sq Ft Filter ) | 25021-0200S
$206.17
★★★★★ (20)
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Sta-Rite System 3 Replacement Element 191 Sq Ft Inner Cartridge S8M150 (450 Sq Ft Filter) | 25021-0202S
Sta-Rite System 3 Replacement Element 191 Sq Ft Inner Cartridge S8M150 (450 Sq Ft Filter) | 25021-0202S
$352.87
★★★★★ (9)
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Jandy Neverlube Backwash Valve with Unions | 8034J
Jandy Neverlube Backwash Valve with Unions | 8034J
$281.23
★☆☆☆☆ (1)
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Fiber Clear Cellulose Powder Filter Media | Replaces Diatomaceous Earth | 3 lbs. | FCR-048B
Fiber Clear Cellulose Powder Filter Media | Replaces Diatomaceous Earth | 3 lbs. | FCR-048B
$41.52
★★★★★ (10)
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DiversiTech The Black Pad Plastic Equipment Pad 24"x36"x2" | EP2436-2
DiversiTech The Black Pad Plastic Equipment Pad 24"x36"x2" | EP2436-2
$73.93
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Pentair Sand Dollar SD60 22" Top Mount Sand Filter with Clamp Style 1.5" Multiport Backwash Valve | 2.3 Sq. Ft. | EC-145322
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Pentair Sand Dollar SD60 22" Top Mount Sand Filter with Clamp Style 1.5" Multiport Backwash Valve | 2.3 Sq. Ft. | EC-145322
$619.00
★★★★★ (25)
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Pentair Sta-Rite Slide Backwash Valve Sand & DE-SD Series Valve ABS | 2" Slip Valve with Unions | 263053
Pentair Sta-Rite Slide Backwash Valve Sand & DE-SD Series Valve ABS | 2" Slip Valve with Unions | 263053
$166.35
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Waterway 2" Socket Multiport Valve with Union Connections for D.E. Filters | WVD002
Waterway 2" Socket Multiport Valve with Union Connections for D.E. Filters | WVD002
$165.70
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D.E. Filters
DE Filter Backwash Valves (all brands)
Cartridge Filters (all brands)
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Pool Filters for Sale Online

The best selection of pool filters to remove unwanted impurities and debris from your pool’s water are at Pool Supply Unlimited. Our sand, cartridge, and diatomaceous earth (D.E.) pool filters from leading pool brands like Pentair give you plenty of options when deciding which pool filter is best for your swimming pool.
 
Pool Supply Unlimited also carries the necessary pool chemicals and pool supplies you need to keep your pool clean and sanitized, whether it’s open for the summer or all year long.

Different Types of Pool Filters

Pool filters pull the water through filtration media to catch and trap any dirt, sediment, and other elements before pushing the clean water back into the pool. The actual materials used to filter out the water and trap dirt and sediment will vary, as will the mechanics of the pool filters themselves.
 
In some cases, your pool type or location will require a specific type of filter, and in other cases, you'll just want to decide on what's best for your needs. For instance, what’s best for a single-family home may not be what’s best for a large commercial pool. To understand your choices when it comes to pool filters, it's good to first get a better understanding of how each filter type works.

Cartridge Filters

Cartridge pool filters work by passing water through a pleated cartridge, collecting unwanted dirt and debris while the newly cleaned water continues through to the pool. Cartridge pool filters can filter down to about 10 microns. Cleaning the internal cartridge is fairly simple, just take it out and rinse it off making sure to properly clean between the pleats before returning to the filter. Cartridge pool filters are recommended for public pools or pools in busy apartment complexes and hotels.

D.E Filters

Diatomaceous earth (D.E.) pool filters use diatomaceous earth to coat filter grids that collect dirt and sediment to give your pool the thorough cleaning it needs. D.E pool filters can filter down to about 5 microns, the lowest micron rating of any style pool filter, making them a great choice for the best water clarity. Like cartridges, the D.E. filter grids inside your D.E. pool filter will eventually need to be replaced.

Sand Filters

Because of their simple, effective, and relatively low maintenance needs, sand pool filters are one of the most popular swimming pool filter options available today. As pool water is routed through a sand-filled pressure vessel, dirt accumulates between sand particles. Sand pool filters are relatively low maintenance with sand only having to be replaced every few years, but do require “back-washing” to clean the filter. Sand pool filters are the least effective filter type, filtering about 20 microns at best.
 
Pool Supply Unlimited has cartridge pool filter and sand pool filter systems for above ground pools in a pool filter and pool pump combination.
 
No matter what your pool and spa filter needs, Pool Supply Unlimited has the best selection of pool and spa filters for you to choose from.

RELATED ARTICLES

Which Pool Filter is Best for My Swimming Pool?

Which Pool Filter is Best for My Swimming Pool?

As you probably know, pool filters are designed to aid in keeping pool water clean by trapping dirt, debris and other such elements. But there are a few different methods to pool filtration - each with their own advantages and shortcomings.

What Replacement Filter Cartridge Do I Need?

What Replacement Filter Cartridge Do I Need?

Not sure what model you need to replace that dirty cartridge in your filter? Here are some tips to take away the confusion and get the problem solved.

How To Add D.E. Powder To Your Pool

How To Add D.E. Powder To Your Pool

If you own a D.E. Filter or are planning on investing in one as the water filtration system for your swimming pool you will at some point or another need to add D.E. powder to your pool. This blog post provides a brief overview of what D.E powder is and how it works and a detailed step by step guide for safely adding D.E. powder to your pool.

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ABOUT THE STORE
Pool Supply Unlimited is an e-commerce company that loves water. We love to pump it, filter it, heat it, chlorinate it, light it up and stare at it while we're barbequing a fat, juicy steak. There are real pool professionals working here. Our guys have seen thousands of pools in their careers, no exaggeration. We are based in San Antonio, TX and can land most products to your door (within the 48 contiguous states) in less than a week.
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