Pool Pump Parts

Pool Pump Parts

2652 products

  • #7 Union Assembly., 1-1/2"S Pump End, Bag Of 2

    #7 Union Assembly., 1-1/2"S Pump End, Bag Of 2

    #7 Union Assembly., 1-1/2"S Pump End, Bag Of 2

    Waterway Plastics

    SKU: PST-_400-4060-2B
    MPN: 400-4060-2B
    Sale Price Value: 0 Sale Price Number: 0 Website Price Value: 1560.0 Website Price Number: 1560.0 All Metafields: {"bundle":"gid:\/\/shopify\/Metaobject\/110253768769","discontinued":false,"mpn":"400-4060-2B","saleprice":"0","warehouselocations":"Memphis, TN | Tucson, AZ","warranty":"12 Months","websiteprice":"15.6"}
    $16.40
    $36.80 $16.40
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  • O-Ring, Speck 433/EasyFit, Drain Plug

    O-Ring, Speck 433/EasyFit, Drain Plug

    O-Ring, Speck 433/EasyFit, Drain Plug

    Speck Pumps

    SKU: PST-35-475-1154
    MPN: 2920141240
    Sale Price Value: 0 Sale Price Number: 0 Website Price Value: 890.0 Website Price Number: 890.0 All Metafields: {"bundle":"gid:\/\/shopify\/Metaobject\/110474723393","mpn":"2920141240","replacedby":"PST-90-423-7111?17800","saleprice":"0","warehouselocations":"Tucson, AZ","warranty":"12 Months","websiteprice":"8.9"}
    $9.30
    $19.00 $9.30
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  • Shaft Seal, AS-1521, 3/4" Shaft, Buna-N, PS-201

    Shaft Seal, AS-1521, 3/4" Shaft, Buna-N, PS-201

    Shaft Seal, AS-1521, 3/4" Shaft, Buna-N, PS-201

    Aladdin

    SKU: PST-35-423-1065
    MPN: AS-1521
    Sale Price Value: 0 Sale Price Number: 0 Website Price Value: 1450.0 Website Price Number: 1450.0 All Metafields: {"bundle":"gid:\/\/shopify\/Metaobject\/110469021761","mpn":"AS-1521","replacedby":"PST-35-423-1021?7235,PST-35-423-1025?7170","saleprice":"0","warehouselocations":"Murray, UT","warranty":"12 Months","websiteprice":"14.5"}
    $14.60
    $31.70 $14.60
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  • Gasket, Hayward Super Pump/Max-Flo, Diffuser

    Gasket, Hayward Super Pump/Max-Flo, Diffuser

    Gasket, Hayward Super Pump/Max-Flo, Diffuser

    Hayward Pool Products

    SKU: PST-35-150-2030
    MPN: SPX1600R
    Sale Price Value: 0 Sale Price Number: 0 Website Price Value: 1160.0 Website Price Number: 1160.0 All Metafields: {"bundle":"gid:\/\/shopify\/Metaobject\/110443757633","mpn":"SPX1600R","replacedby":"PST-90-423-1141?6471","saleprice":"0","warehouselocations":"Murray, UT","warranty":"12 Months","websiteprice":"11.6"}
    $12.40
    $30.50 $12.40
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  • Impeller, Waterco HydroStorm/Plus/Star, 1.5hp

    Impeller, Waterco HydroStorm/Plus/Star, 1.5hp

    Impeller, Waterco HydroStorm/Plus/Star, 1.5hp

    Waterco

    SKU: PST-35-252-1163
    MPN: 63401425
    Sale Price Value: 0 Sale Price Number: 0 Website Price Value: 6130.0 Website Price Number: 6130.0 All Metafields: {"bundle":"gid:\/\/shopify\/Metaobject\/110454341697","discontinued":false,"mpn":"63401425","replacedby":"PST-35-252-1162?9622","saleprice":"0","warehouselocations":"Memphis, TN | Tucson, AZ","warranty":"12 Months","websiteprice":"61.3"}
    $68.60
    $137.80 $68.60
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  • Square Ring, Hayward SP1800X/SP2800X, Trap Lid, O-76

    Square Ring, Hayward SP1800X/SP2800X, Trap Lid, O-76

    Square Ring, Hayward SP1800X/SP2800X, Trap Lid, O-76

    Hayward Pool Products

    SKU: PST-35-150-1309
    MPN: SPX0125T
    Sale Price Value: 0 Sale Price Number: 0 Website Price Value: 1500 Website Price Number: 1500 All Metafields: {"bundle":"gid:\/\/shopify\/Metaobject\/110442381377","mpn":"SPX0125T","replacedby":"PST-90-423-1076?23291","saleprice":"0","warehouselocations":"Bloomfield, CT | Murray, UT","warranty":"12 Months","websiteprice":"15"}
    $16.20
    $36.40 $16.20
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  • O-Ring, Hayward Matrix, Trap Lid

    O-Ring, Hayward Matrix, Trap Lid

    O-Ring, Hayward Matrix, Trap Lid

    Hayward Pool Products

    SKU: PST-35-150-3246
    MPN: SPX5500H
    Sale Price Value: 0 Sale Price Number: 0 Website Price Value: 1650.0 Website Price Number: 1650.0 All Metafields: {"bundle":"gid:\/\/shopify\/Metaobject\/110446280769","mpn":"SPX5500H","replacedby":"PST-90-423-5362?11155","saleprice":"0","warehouselocations":"Bloomfield, CT | Murray, UT","warranty":"12 Months","websiteprice":"16.5"}
    $17.80
    $39.70 $17.80
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  • O-Ring, Pentair StaRite ABG, Seal Plate, O-336

    O-Ring, Pentair StaRite ABG, Seal Plate, O-336

    O-Ring, Pentair StaRite ABG, Seal Plate, O-336

    StaRite

    SKU: PST-35-102-1642
    MPN: 35505-1438
    Sale Price Value: 0 Sale Price Number: 0 Website Price Value: 1560.0 Website Price Number: 1560.0 All Metafields: {"bundle":"gid:\/\/shopify\/Metaobject\/110419378241","mpn":"35505-1438","replacedby":"PST-90-423-5358?11348","saleprice":"0","warehouselocations":"Newnan, GA | Bloomfield, CT","warranty":"12 Months","websiteprice":"15.6"}
    $16.00
    $35.60 $16.00
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  • O-Ring, Waterway Supreme, Faceplate, O-4

    O-Ring, Waterway Supreme, Faceplate, O-4

    O-Ring, Waterway Supreme, Faceplate, O-4

    Waterway Plastics

    SKU: PST-35-270-1530
    MPN: 805-0330
    Sale Price Value: 0 Sale Price Number: 0 Website Price Value: 800 Website Price Number: 800 All Metafields: {"bundle":"gid:\/\/shopify\/Metaobject\/110457323585","mpn":"805-0330","replacedby":"PST-90-423-5330?10874","saleprice":"0","warehouselocations":"Bloomfield, CT","warranty":"12 Months","websiteprice":"8"}
    $9.90
    $19.20 $9.90
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  • Gasket, Pentair, Trap Body to Volute, 3-1/8"ID, 4-1/2"OD

    Gasket, Pentair, Trap Body to Volute, 3-1/8"ID, 4-1/2"OD

    Gasket, Pentair, Trap Body to Volute, 3-1/8"ID, 4-1/2"OD

    Pentair Pool Products

    SKU: PST-35-102-1380
    MPN: C20-123Z
    Sale Price Value: 0 Sale Price Number: 0 Website Price Value: 1570.0 Website Price Number: 1570.0 All Metafields: {"bundle":"gid:\/\/shopify\/Metaobject\/110418001985","mpn":"C20-123Z","replacedby":"PST-90-423-2098?17741,PST-90-423-2099?10984","saleprice":"0","warehouselocations":"Murray, UT","warranty":"12 Months","websiteprice":"15.7"}
    $16.80
    $37.90 $16.80
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  • Impeller, Gecko AquaFlo XP2, 3.0hp, 4-5/16"OD

    Impeller, Gecko AquaFlo XP2, 3.0hp, 4-5/16"OD

    Impeller, Gecko AquaFlo XP2, 3.0hp, 4-5/16"OD

    Aqua-Flo

    SKU: PST-35-402-2031
    MPN: 91694301
    Sale Price Value: 0 Sale Price Number: 0 Website Price Value: 2630.0 Website Price Number: 2630.0 All Metafields: {"bundle":"gid:\/\/shopify\/Metaobject\/110467874881","discontinued":false,"mpn":"91694301","saleprice":"0","warehouselocations":"Memphis, TN | Tucson, AZ","warranty":"12 Months","websiteprice":"26.3"}
    $32.30
    $71.10 $32.30
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  • Impeller, Gecko AquaFlo XP2E, 3.0ohp/4.othp

    Impeller, Gecko AquaFlo XP2E, 3.0ohp/4.othp

    Impeller, Gecko AquaFlo XP2E, 3.0ohp/4.othp

    Aqua-Flo

    SKU: PST-35-402-1435
    MPN: 91695310
    Sale Price Value: 0 Sale Price Number: 0 Website Price Value: 3170.0 Website Price Number: 3170.0 All Metafields: {"bundle":"gid:\/\/shopify\/Metaobject\/110466695233","mpn":"91695310","replacedby":"PST-35-402-2035?23026","saleprice":"0","warehouselocations":"Bloomfield, CT","warranty":"12 Months","websiteprice":"31.7"}
    $29.70
    $64.90 $29.70
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  • O-Ring, Pentair Sta-Rite IntelliPro, Seal Plate

    O-Ring, Pentair Sta-Rite IntelliPro, Seal Plate

    O-Ring, Pentair Sta-Rite IntelliPro, Seal Plate

    StaRite

    SKU: PST-35-102-1118
    MPN: U9-228AZ
    Sale Price Value: 0 Sale Price Number: 0 Website Price Value: 1610.0 Website Price Number: 1610.0 All Metafields: {"bundle":"gid:\/\/shopify\/Metaobject\/110415839297","mpn":"U9-228AZ","replacedby":"PST-90-423-5449?11949","saleprice":"0","warehouselocations":"Murray, UT","warranty":"12 Months","websiteprice":"16.1"}
    $17.10
    $38.90 $17.10
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  • Pump Housing/Strainer

    Pump Housing/Strainer

    Pump Housing/Strainer

    Hayward Pool Products

    SKU: PST-_SPX3120AA
    MPN: SPX3120AA
    Sale Price Value: 0 Sale Price Number: 0 Website Price Value: 36930.0 Website Price Number: 36930.0 All Metafields: {"mpn":"SPX3120AA","saleprice":"0","warehouselocations":"Idaho Falls, ID","warranty":"12 Months","websiteprice":"369.3"}
    $309.40
    $609.30 $309.40
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  • Basket, Pump, OEM Waterco SupaTuf/HydroStorm, Old Style

    Basket, Pump, OEM Waterco SupaTuf/HydroStorm, Old Style

    Basket, Pump, OEM Waterco SupaTuf/HydroStorm, Old Style

    Waterco

    SKU: PST-35-252-1185
    MPN: 634001
    Sale Price Value: 0 Sale Price Number: 0 Website Price Value: 2210.0 Website Price Number: 2210.0 All Metafields: {"bundle":"gid:\/\/shopify\/Metaobject\/110454571073","discontinued":false,"mpn":"634001","saleprice":"0","warehouselocations":"Memphis, TN | Tucson, AZ","warranty":"12 Months","websiteprice":"22.1"}
    $29.40
    $64.10 $29.40
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  • Screw, Pentair Purex Whisperflo/IntelliFlo, 1/4-20 x 1"

    Screw, Pentair Purex Whisperflo/IntelliFlo, 1/4-20 x 1"

    Screw, Pentair Purex Whisperflo/IntelliFlo, 1/4-20 x 1"

    Pentair Pool Products

    SKU: PST-35-102-3082
    MPN: 071652Z
    Sale Price Value: 0 Sale Price Number: 0 Website Price Value: 1040.0 Website Price Number: 1040.0 All Metafields: {"mpn":"071652Z","saleprice":"0","warehouselocations":"Murray, UT","websiteprice":"10.4"}
    $11.00
    $25.90 $11.00
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Replacement & Motor Parts for Swimming Pool Pumps

Repair your pool pump and restore full performance with pool pump replacement parts from Hayward, Pentair, Sta-Rite, Waterway, Speck, Waterco, and Gecko/AquaFlo. PST Pool Supplies stocks the OEM-compatible seals, gaskets, impellers, O-rings, and hardware that keep pool pumps running season after season, starting from $9.30.

The most frequently replaced pump components are: shaft seals (AS-1521 Buna-N 3/4" shaft, PS-201 compatible) — the mechanical face seal between the motor shaft and wet end that prevents water from entering the motor; a leaking shaft seal will destroy a motor in one season and is among the first things to inspect when you see water under the pump. Impellers — the rotating component that creates flow — are available for Waterco HydroStorm/Plus/Star 1.5 HP and Gecko AquaFlo XP2/XP2E 3.0–4.0 HP; a worn or debris-packed impeller is the most common cause of reduced pump flow. O-rings and square rings from the SP1800X/SP2800X trap lid (O-76), Hayward Matrix trap lid, Pentair Sta-Rite ABG seal plate (O-336), Waterway Supreme faceplate (O-4), Pentair IntelliPro seal plate, and Speck 433/EasyFit drain plug cover the most common pump seal points. Diffuser gaskets for the Hayward Super Pump and Max-Flo seal the diffuser-to-volute interface — a failed diffuser gasket causes the pump to lose prime. Union assemblies (1-1/2" S pump end, 2-pack) allow pumps to be disconnected from plumbing without cutting pipe. Pump housing/strainer bodies and Waterco SupaTuf/HydroStorm baskets complete the structural pump parts lineup. For complete pump replacements, see our pool pumps collection.

When diagnosing pool pump issues, the most common failure modes and their parts are: water under the pump → shaft seal replacement; loss of prime → pump lid O-ring or diffuser gasket; reduced flow → impeller replacement or cleaning; rattling noise → debris in impeller or loose impeller nut. Always identify your pump by the model nameplate on the motor — pump parts are highly model-specific, and an impeller or seal from the wrong pump variant will not fit. Cross-reference the existing part number stamped on the component against the OEM part number in your pump's service manual to confirm before ordering.

Shop pool pump replacement parts and get your pump back to full performance without the cost of a full pump replacement.

Frequently Asked Questions

How do I know if my pool pump shaft seal needs to be replaced?
The most definitive sign of a failing shaft seal is water dripping or pooling directly beneath the pump — specifically below the junction between the wet end (strainer housing) and the motor. The shaft seal is the mechanical face seal that prevents pool water from traveling along the motor shaft into the motor windings. A small weep of moisture at startup that dries after the pump pressurizes may be acceptable, but continuous dripping indicates a failed seal. Other signs: rust-stained concrete beneath the pump (from iron in pool water contacting the motor case), motor humming but not starting after sitting all winter (water in the motor from a leaking shaft seal can corrode bearings or cause windings to short). Shaft seals should be proactively replaced every 3–5 years regardless of visible leaking — the seal faces wear gradually and can fail suddenly. Always replace the shaft seal and impeller O-ring together as a set.
What is a pool pump diffuser gasket and when should I replace it?
The diffuser gasket is a flat rubber gasket that seals the joint between the pump's diffuser plate and the volute (strainer housing body). The diffuser redirects water flow from the impeller into the pump's outlet port — the gasket prevents air from being drawn into the pump housing at this joint. A failed or compressed diffuser gasket is a common cause of chronic loss of prime: the pump fills with water when filling from the hose but quickly loses prime once running, because air is being sucked in through the bad gasket faster than the impeller can maintain vacuum. To inspect, remove the pump strainer basket lid and basket, then look into the pump housing with a flashlight — the diffuser is the circular plate visible at the back. A deteriorated gasket will be visibly compressed, cracked, or missing sections. Replacement is a straightforward disassembly of the wet end — the gasket costs only a few dollars.
Can I replace the impeller without replacing the entire pump?
Yes — impeller replacement is a standard pump repair that restores flow performance without the cost of a complete pump replacement. The impeller is inside the wet end of the pump (the strainer housing side, not the motor side) and is threaded onto the motor shaft. Procedure: (1) Turn off pump at the breaker. (2) Close suction and return valves. (3) Remove the strainer lid, basket, and then the screws holding the strainer housing to the motor face plate. (4) Pull the strainer housing off the motor. (5) Hold the motor shaft from spinning (use a flat-head screwdriver in the motor fan slot on the back of the motor) while unscrewing the impeller counterclockwise. (6) Thread on the new impeller clockwise until snug — do not overtighten. (7) Reassemble in reverse. Important: always replace the shaft seal at the same time as the impeller — the motor has been disassembled and the shaft seal is inexpensive insurance. Verify the new impeller's HP rating matches your motor's HP for correct performance.
Are aftermarket pool pump parts as good as OEM parts?
For many pump wear parts, quality aftermarket parts are fully equivalent to OEM — particularly O-rings, gaskets, and baskets where the specifications (material, dimensions, durometer) can be exactly matched. Aladdin Equipment Company is a respected aftermarket manufacturer of pool pump seals, O-rings, and gaskets that meet or exceed OEM specifications and fit virtually all major pump brands. For shaft seals, use a reputable manufacturer's part — a low-quality shaft seal that fails prematurely will leak water into the motor and cause a much more expensive motor failure. For impellers, OEM or OEM-equivalent is important because impeller vane geometry, blade count, and diameter are precisely engineered for each pump's motor HP and hydraulic curve — an impeller not designed for your pump can cause cavitation, reduced flow, or motor overload. When in doubt, confirm the part number from the OEM service manual and cross-reference with the aftermarket catalog before purchasing.