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Pre-cut Gaskets

  • buy c21-10 diffuser ring

    STA-RITE / BERKELEY / PENTAIR DIFFUSER C21-10

    STA-RITE / BERKELEY / PENTAIR DIFFUSER C21-10

    Sta-Rite / Berkeley / Pentair Diffuser C21-10 — Gasket / Seal Ring

    Pre-cut diffuser seal ring (C21-10) for Sta-Rite, Berkeley, and Pentair diffuser assemblies. Sized to seat cleanly on the diffuser for even compression and a leak-tight seal during service or rebuilds.

    Cross-reference / Names:

    • Part: C21-10 Diffuser

    • Also called: Diffuser gasket / seal ring

    Compatibility:

    • Motor range: ~1–2.5 HP diffuser applications

    • Pump families: Sta-Rite / Berkeley / Pentair equivalents

    • Also used on: Anthony centrifugal pool pumps (select models)

    Why this part:

    • Direct-fit profile for quick, reliable installs

    • Consistent thickness for uniform sealing pressure

    • Smooth edges for easier alignment and reassembly

    Explore our full lineup of Pre-cut Gaskets.   

    Looking for more? Check out our Shaft Seals, Pump Repair Kits , & Parts/Accessories 

    Have questions?- Call us anytime- we-re here to help 

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  • c21-2 diffuser ring

    STA-RITE / BERKELEY / PENTAIR DIFFUSER RING C21-2

    STA-RITE / BERKELEY / PENTAIR DIFFUSER RING C21-2

    Sta-Rite / Berkeley / Pentair Diffuser Ring C21-2

    Pre-cut diffuser ring gasket (C21-2) for Sta-Rite, Berkeley, and Pentair D-series / ED-series pumps. Sized to seat cleanly on the diffuser, providing uniform compression and a leak-tight seal after service or rebuilds.

    Cross-references & use:

    • Part: C21-2 Diffuser Ring

    • Also called: D-Series Diffuser O-Ring / Gasket

    • Pump families: Sta-Rite D & ED series (Berkeley/Pentair equivalents)

    Why choose this part:

    • Direct-fit profile for fast, reliable installs

    • Consistent thickness for even sealing pressure

    • Smooth edges for easier alignment during reassembly

    Explore our full lineup of Pre-cut Gaskets.   

    Looking for more? Check out our Shaft Seals, Pump Repair Kits , & Parts/Accessories 

    Have questions? Call us anytime-we’re here to help 

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  • Sta-Rite C-20-103

    Sta-Rite C-20-103 ; Sta-Rite C-20-123

    Sta-Rite C-20-103 ; Sta-Rite C-20-123

    Item #SMSG 12B; SMSG 12BRR

    Sta-Rite C-20-103 / C-20-123 — Pre-Cut Gasket (C20103 / C20123)

    Pre-cut housing/volute gasket for Sta-Rite pump assemblies. Precision-cut to seat cleanly and compress evenly—helping prevent leaks during routine service or rebuilds.

    Specs

    • Dimensions: ID 3.125″ × OD 4.500″

    • Material: 3/64″ vellumoid (vegetable fiber), brown (standard); Red Rubber

    • Cross-reference: Sta-Rite C-20-103 (C20103), Sta-Rite C-20-123 (C20123)

    Available versions (choose in material dropdown)

    1. Brown Vellumoid (Standard)  — C-20-103 / C20103 standard specification

    2. Red Rubber — C-20-123 / C20123 equivalent

    Explore our full lineup of Pre-cut Gaskets.   

    Looking for more? Check out our Shaft Seals, Pump Repair Kits , & Parts/Accessories 

    Have questions? Call us anytime-we’re here to help 

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  • buy sta-rite c-20-21 gasket

    Sta-Rite C-20-21

    Sta-Rite C-20-21

    Item #SMSG 4

    Sta-Rite C-20-21 — Pre-Cut Gasket (C2021)

    Pre-cut housing/volute gasket for Sta-Rite pump assemblies. Precision-cut to seat cleanly and compress evenly—helping prevent leaks during routine service or rebuilds.

    Specs

    • Material: 3/64″ vellumoid (vegetable fiber), brown

    • Dimensions: ID 6.375″ × OD 7.875″

    Cross-reference

    • Sta-Rite: C-20-21 / C2021

    Explore our full lineup of Pre-cut Gaskets.   

    Looking for more? Check out our Shaft Seals, Pump Repair Kits , & Parts/Accessories 

    Have questions? Call us anytime-we’re here to help 

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  • Sta-Rite C-20-46 Pre-Cut Gasket

    Sta-Rite c-20-46

    Sta-Rite c-20-46

    Item #SMSG 1

    Sta-Rite C-20-46 — Pre-Cut Gasket (C2046)

    Pre-cut housing/volute gasket for Sta-Rite pump assemblies. Precision-cut to seat cleanly and compress evenly—helping prevent leaks during routine service or rebuilds.

    Specs

    • Material: 3/64″ vellumoid (vegetable fiber), brown

    • Dimensions: ID 7.937″ × OD 9.625″

    Cross-reference

    • Sta-Rite: C-20-46 / C2046

    Explore our full lineup of Pre-cut Gaskets.   

    Looking for more? Check out our Shaft Seals, Pump Repair Kits , & Parts/Accessories 

    Have questions? Call us anytime-we’re here to help 

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  • Sta-Rite C-20-72 gasket

    Sta-Rite C-20-72

    Sta-Rite C-20-72

    Item #SMSG 10

    Sta-Rite C-20-72 — Pre-Cut Gasket (C2072)

    Pre-cut housing/volute gasket for Sta-Rite pump assemblies. Precision-cut to seat cleanly and compress evenly—helping prevent leaks during routine service or rebuilds.

    Specs

    • Material: 3/64″ vellumoid (vegetable fiber), brown

    • Dimensions: ID 4.750″ × OD 5.625″

    Cross-reference

    • Sta-Rite: C-20-72 / C2072

    Explore our full lineup of Pre-cut Gaskets.   

    Looking for more? Check out our Shaft Seals, Pump Repair Kits , & Parts/Accessories 

    Have questions? Call us anytime-we’re here to help 

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  • Sta-Rite C-20-86

    Sta-Rite C-20-86

    Sta-Rite C-20-86

    Item #SMSG 2

    Sta-Rite C-20-86 — Pre-Cut Gasket (C2086)

    Pre-cut housing/volute gasket for Sta-Rite pump assemblies. Precision-cut to seat cleanly and compress evenly—helping prevent leaks during routine service or rebuilds.

    Specs

    • Material: 3/64″ vellumoid (vegetable fiber), brown

    • Dimensions: ID 8.187″ × OD 9.750″

    Cross-reference

    • Sta-Rite: C-20-86 / C2086

    Explore our full lineup of Pre-cut Gaskets.   

    Looking for more? Check out our Shaft Seals, Pump Repair Kits , & Parts/Accessories 

    Have questions? Call us anytime- we’re here to help 

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  • sta-rite c-20-87 gasket

    Sta-Rite C-20-87

    Sta-Rite C-20-87

    Item #SMSG 70

    Sta-Rite C-20-87 — Pre-Cut Gasket (C2087)

    Pre-cut housing/volute gasket for Sta-Rite pump assemblies. Precision-cut to seat cleanly and compress evenly—helping prevent leaks during routine service or rebuilds.

    Specs

    • Material: 3/64″ vellumoid (vegetable fiber), brown

    • Dimensions: ID 9.312″ × OD 10.875″

    Cross-reference

    • Sta-Rite: C-20-87 / C2087

    Explore our full lineup of Pre-cut Gaskets.   

    Looking for more? Check out our Shaft Seals, Pump Repair Kits , & Parts/Accessories 

    Have questions? Call us anytime-we’re here to help 

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  • Buy Sta-Rite Gasket

    Sta-rite Gasket 5-3/8 x 7-3/8

    Sta-rite Gasket 5-3/8 x 7-3/8

    Item #SMSG 6

    Sta-Rite 5-3/8″ × 7-3/8″ — Pre-Cut Gasket

    Pre-cut housing/volute gasket for Sta-Rite pump assemblies. Precision-cut to seat cleanly and compress evenly—helping prevent leaks during routine service or rebuilds.

    Specs

    • Material: 3/64″ vellumoid (vegetable fiber), brown

    • Dimensions: ID 5.375″ × OD 7.375″ (listed as 5-3/8″ × 7-3/8″)

    Explore our full lineup of  Pre-cut Gaskets.   Looking for more? Check out our Shaft Seals, Pump Repair Kits , & Parts/Accessories 

    Have questions? Call us anytime- we’re here to help 

    View Product