Filter Parts & Accessories

Filter Parts & Accessories

1915 products

  • -52% Off
    Piston Kit, Hayward RegenX RG450

    Piston Kit, Hayward RegenX RG450

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    Piston Kit, Hayward RegenX RG450

    Hayward Pool Products

    RGX45RA
    Sale Price Value: 0 Sale Price Number: 0 Website Price Value: 0 Website Price Number: 0 All Metafields: {"mpn":"RGX45RA","warranty":"12 Months"}
    $36.50
    $77.60 $36.50
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  • -51% Off
    Diffuser, Hayward RegenX RG450/C850, with Screws

    Diffuser, Hayward RegenX RG450/C850, with Screws

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    Diffuser, Hayward RegenX RG450/C850, with Screws

    Hayward Pool Products

    RGX45DA
    Sale Price Value: 0 Sale Price Number: 0 Website Price Value: 0 Website Price Number: 0 All Metafields: {"mpn":"RGX45DA","saleprice":"0","warranty":"12 Months"}
    $60.50
    $125.40 $60.50
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  • -56% Off
    Decal, Hayward Perflex 65/A/75/A

    Decal, Hayward Perflex 65/A/75/A

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    Decal, Hayward Perflex 65/A/75/A

    Hayward Pool Products

    ECX1230
    Sale Price Value: 0 Sale Price Number: 0 Website Price Value: 0 Website Price Number: 0 All Metafields: {"mpn":"ECX1230","saleprice":"0","warehouselocations":"Tucson, AZ","warranty":"12 Months"}
    $11.70
    $26.70 $11.70
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  • -35% Off
    Tank Body, Hayward Perflex EC65/75

    Tank Body, Hayward Perflex EC65/75

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    Tank Body, Hayward Perflex EC65/75

    Hayward Pool Products

    ECX11184AT
    Sale Price Value: 0 Sale Price Number: 0 Website Price Value: 0 Website Price Number: 0 All Metafields: {"bundle":"gid:\/\/shopify\/Metaobject\/110288175169","mpn":"ECX11184AT","warranty":"12 Months"}
    $513.40
    $794.20 $513.40
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  • -51% Off
    Tube Sheet, Hayward Perflex EC65/75, Bottom

    Tube Sheet, Hayward Perflex EC65/75, Bottom

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    Tube Sheet, Hayward Perflex EC65/75, Bottom

    Hayward Pool Products

    ECX1103
    Sale Price Value: 0 Sale Price Number: 0 Website Price Value: 0 Website Price Number: 0 All Metafields: {"bundle":"gid:\/\/shopify\/Metaobject\/110285586497","mpn":"ECX1103","saleprice":"0","warranty":"12 Months"}
    $53.60
    $110.40 $53.60
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  • -51% Off
    Tube Sheet, Hayward Perflex EC65/75, Top

    Tube Sheet, Hayward Perflex EC65/75, Top

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    Tube Sheet, Hayward Perflex EC65/75, Top

    Hayward Pool Products

    ECX1104
    Sale Price Value: 0 Sale Price Number: 0 Website Price Value: 0 Website Price Number: 0 All Metafields: {"bundle":"gid:\/\/shopify\/Metaobject\/110285553729","mpn":"ECX1104","warranty":"12 Months"}
    $49.20
    $100.90 $49.20
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  • -35% Off
    Flex Tube Nest, Hayward Perflex EC50

    Flex Tube Nest, Hayward Perflex EC50

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    Flex Tube Nest, Hayward Perflex EC50

    Hayward Pool Products

    ECX1036
    Sale Price Value: 0 Sale Price Number: 0 Website Price Value: 0 Website Price Number: 0 All Metafields: {"bundle":"gid:\/\/shopify\/Metaobject\/110285422657","mpn":"ECX1036","saleprice":"0","warehouselocations":"Memphis, TN","warranty":"12 Months"}
    $542.00
    $837.90 $542.00
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  • -37% Off
    Clamp Ring, Hayward Perflex EC50

    Clamp Ring, Hayward Perflex EC50

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    Clamp Ring, Hayward Perflex EC50

    Hayward Pool Products

    ECX5000C
    Sale Price Value: 0 Sale Price Number: 0 Website Price Value: 0 Website Price Number: 0 All Metafields: {"bundle":"gid:\/\/shopify\/Metaobject\/110285226049","mpn":"ECX5000C","warranty":"12 Months"}
    $244.90
    $391.90 $244.90
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  • -35% Off
    Tank Body, Hayward Perflex EC50A, w/Flow Diffuser

    Tank Body, Hayward Perflex EC50A, w/Flow Diffuser

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    Tank Body, Hayward Perflex EC50A, w/Flow Diffuser

    Hayward Pool Products

    ECX11344P
    Sale Price Value: 0 Sale Price Number: 0 Website Price Value: 0 Website Price Number: 0 All Metafields: {"bundle":"gid:\/\/shopify\/Metaobject\/110285193281","mpn":"ECX11344P","saleprice":"0","warehouselocations":"Tucson, AZ","warranty":"12 Months"}
    $389.80
    $603.20 $389.80
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  • -53% Off
    Tube Sheet, Hayward Perflex EC40/45/50

    Tube Sheet, Hayward Perflex EC40/45/50

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    Tube Sheet, Hayward Perflex EC40/45/50

    Hayward Pool Products

    ECX1004
    Sale Price Value: 0 Sale Price Number: 0 Website Price Value: 0 Website Price Number: 0 All Metafields: {"bundle":"gid:\/\/shopify\/Metaobject\/110284603457","mpn":"ECX1004","saleprice":"0","warehouselocations":"Tucson, AZ","warranty":"12 Months"}
    $43.50
    $93.30 $43.50
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  • -35% Off
    Flex Tube Nest, Hayward Perflex EC40AC

    Flex Tube Nest, Hayward Perflex EC40AC

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    Flex Tube Nest, Hayward Perflex EC40AC

    Hayward Pool Products

    ECX4035
    Sale Price Value: 0 Sale Price Number: 0 Website Price Value: 0 Website Price Number: 0 All Metafields: {"bundle":"gid:\/\/shopify\/Metaobject\/110284374081","mpn":"ECX4035","warranty":"12 Months"}
    $744.70
    $1,150.30 $744.70
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  • -35% Off
    Grid Assembly, Pentair PacFab FNS, 60 sqft

    Grid Assembly, Pentair PacFab FNS, 60 sqft

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    Grid Assembly, Pentair PacFab FNS, 60 sqft

    Pentair Pool Products

    195070
    Sale Price Value: 0 Sale Price Number: 0 Website Price Value: 0 Website Price Number: 0 All Metafields: {"bundle":"gid:\/\/shopify\/Metaobject\/110284144705","mpn":"195070","prop65":"This product can expose you to chemicals which is known to the State of California to cause cancer and reproductive harm.","saleprice":"0","warehouselocations":"Bloomfield, CT","warranty":"12 Months"}
    $943.00
    $1,459.60 $943.00
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  • -47% Off
    Manifold/Tie Rod Assembly, Pent Am Prod Warrior 88

    Manifold/Tie Rod Assembly, Pent Am Prod Warrior 88

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    Manifold/Tie Rod Assembly, Pent Am Prod Warrior 88

    Pentair Pool Products

    59022502
    Sale Price Value: 0 Sale Price Number: 0 Website Price Value: 0 Website Price Number: 0 All Metafields: {"bundle":"gid:\/\/shopify\/Metaobject\/110283587649","mpn":"59022502","prop65":"This product can expose you to chemicals which is known to the State of California to cause cancer and reproductive harm.","saleprice":"0","warehouselocations":"Memphis, TN","warranty":"12 Months"}
    $87.00
    $165.50 $87.00
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  • -54% Off
    Retaining Ring, Pentair PacFab ST

    Retaining Ring, Pentair PacFab ST

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    Retaining Ring, Pentair PacFab ST

    PacFab

    175020
    Sale Price Value: 0 Sale Price Number: 0 Website Price Value: 0 Website Price Number: 0 All Metafields: {"bundle":"gid:\/\/shopify\/Metaobject\/110282899521","mpn":"175020","saleprice":"0","warehouselocations":"Tucson, AZ","warranty":"12 Months"}
    $10.90
    $24.20 $10.90
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  • -35% Off
    Grid Assembly, Pentair PacFab ST35

    Grid Assembly, Pentair PacFab ST35

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    Grid Assembly, Pentair PacFab ST35

    Pentair Pool Products

    191953
    Sale Price Value: 0 Sale Price Number: 0 Website Price Value: 0 Website Price Number: 0 All Metafields: {"bundle":"gid:\/\/shopify\/Metaobject\/110282801217","mpn":"191953","prop65":"This product can expose you to chemicals which is known to the State of California to cause cancer and reproductive harm.","saleprice":"0","warranty":"12 Months"}
    $290.80
    $449.70 $290.80
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  • -53% Off
    Center Rod, Pentair PacFab ST80, 1/4" x 28"

    Center Rod, Pentair PacFab ST80, 1/4" x 28"

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    Center Rod, Pentair PacFab ST80, 1/4" x 28"

    Pentair Pool Products

    191513
    Sale Price Value: 0 Sale Price Number: 0 Website Price Value: 0 Website Price Number: 0 All Metafields: {"bundle":"gid:\/\/shopify\/Metaobject\/110282768449","mpn":"191513","prop65":"This product can expose you to chemicals which is known to the State of California to cause cancer and reproductive harm.","warranty":"12 Months"}
    $28.80
    $62.20 $28.80
    Sold out

In & Above Ground Swimming Pool Filter Parts & Accessories

Restore your pool filter to peak performance with the right replacement filter parts — O-rings, DE grids, multiport valves, drain caps, gaskets, and diffusers for all major filter brands. PST Pool Supplies stocks an extensive range of OEM and compatible filter components for Pentair, Hayward, Jacuzzi, Zodiac, Waterco, Waterway, Sta-Rite, and PacFab filters, with prices starting from just $17.

DE filter grids are one of the most commonly replaced filter components — the woven fabric degrades over time from chemical exposure and backwash pressure, leading to DE powder passing through into the pool. PST stocks full and partial DE grids for 24, 48, 60, and 72 square foot filter configurations compatible with Pentair, Hayward, Jacuzzi, and Zodiac DE filters. O-rings and gaskets are essential maintenance items for any filter: tank lid O-rings (Hayward S220, StarClear II; Pentair/PacFab/Sta-Rite; Waterco UltraMite/HRV; Waterway Clearwater) prevent leaks at the filter head and should be replaced whenever the filter is opened for service. Diffuser O-rings (Hayward Max-Flo, Pentair/PacFab/Sta-Rite) maintain flow efficiency inside the filter body. The Pentair PacFab DE filter multiport valve (2" threaded, 8-position) is a popular replacement for filters with worn or leaking MPVs. Also see our dedicated Jacuzzi filter parts collection for Jacuzzi-specific components. Filter installation diagrams are available at Pentair's official support portal and Hayward's technical resources page.

Identifying the correct filter part requires your filter's model number, typically found on a label on the tank body or on the filter head. O-ring sizes are model-specific — even filters in the same product family may use different O-ring cross-sections. When servicing a filter, replace all O-rings in the disassembly path rather than only the ones that are visibly damaged — this prevents a return visit shortly after for a secondary leak. Apply a thin coat of silicone lubricant (never petroleum-based products, which degrade rubber) to all O-rings before reassembly. If you're unsure which part you need, contact our team with your filter model and symptom and we'll identify the right part before you order.

Shop pool filter replacement parts and keep your filtration system running clean and leak-free all season long.

Frequently Asked Questions

How do I find the right O-ring for my pool filter?
Pool filter O-rings are model-specific — the correct O-ring is determined by your filter's exact model number, not just the brand or filter type. Start by locating your filter's model number on the label on the tank body or the filter head. Then look up the part number for the specific O-ring location you need (tank lid, tank body, diffuser, etc.) — these are listed in your filter's owner's manual or available in the manufacturer's online parts diagrams. Common tank lid O-rings in this collection include the Hayward S220 body O-ring (O-103), Hayward StarClear II lid (O-366), and Pentair/Sta-Rite tank body O-rings. If you can't find the manual, contact our team with your model number and we'll identify the correct part. Always replace O-rings as a set when servicing — a new O-ring next to an old, compressed one will result in a second leak shortly after.
How often should DE filter grids be replaced?
DE filter grids should be replaced when the fabric shows holes, tears, or significant fabric degradation that allows DE powder to pass through into the pool. Visually inspect grids every time you open the filter for seasonal cleaning — typically once per year. Grids in good condition can last 5–10 years with proper maintenance; grids in pools with heavy chemical use or frequent backwashing may need replacement sooner. Signs that DE grids need replacement: DE powder is visible in the pool after re-coating ("blowing DE"); pressure rises faster than normal after backwashing; or you can visibly see tears, holes, or ballooned fabric when grids are removed and rinsed. Replace the entire grid set at once — mismatched old and new grids create uneven flow distribution inside the filter.
My multiport valve is leaking — should I repair or replace it?
A leaking multiport valve (MPV) is usually caused by a worn spider gasket inside the valve, or by cracked valve body housing. The spider gasket — the star-shaped rubber seal that routes water between valve positions — degrades over time and causes water to bypass or leak between positions. Spider gaskets can be replaced individually for around $15–$30, making it a cost-effective repair if the valve body is otherwise in good condition. If the valve body is cracked, brittle, or the handle mechanism is damaged, full valve replacement is the better option. The Pentair PacFab DE filter multiport valve (2" threaded, 8-position) in this collection is a complete replacement unit for compatible filters. When replacing, verify thread size (1.5" or 2") and number of valve positions (6 or 8) match your existing setup.
What lubricant should I use on pool filter O-rings?
Always use 100% pure silicone lubricant (such as Magic Lube or similar pool-grade silicone grease) on pool filter O-rings. Apply a thin, even coat to the O-ring's outer surface before reinstalling — enough to make it appear shiny and slippery without excess buildup. Silicone lubricant prevents the O-ring from drying out and cracking and makes assembly easier without risking damage. Never use petroleum-based lubricants (Vaseline, WD-40, cooking oil) on rubber O-rings — petroleum products cause rapid rubber swelling and degradation, which will make the O-ring leak worse within a few days. Teflon-based plumbing grease is also acceptable for pool O-rings. Silicone lubricant is available in our pool adhesives and lubricants collection.