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561.414.1046

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

c21-2 diffuser ring

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

Weight .1 lbs
Dimensions 9 × 9 × 1 in
Quantity Price Per Unit
1 - 2 $9.95
3 - 5 $7.46
6 - 9 $6.97
10 + $6.47
QTY Price

$9.95
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  • DESCRIPTION

    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)

    Rebuilding a Sta-Rite D-series pump? The diffuser ring is one of four parts that come out at a standard seal service — you will also need the mechanical seal, the shaft sleeve and the housing gasket.

    All four together in one part number:

    Sta-Rite D-Series Pump Repair Kit — PS-3883 seal, C23-58 shaft sleeve, this C21-2 diffuser ring and C20-46 gasket

    Not sure what your rebuild needs? Call or text 561-414-1046 — no purchase required.

    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 

  • SPECIFICATIONS
    Cross Reference / Alternative Part Numbers & Common Search Terms

    Part number variations
    Sta-Rite C21-2 diffuser ring
    Starite C21-2 diffuser ring
    Berkeley C21-2 diffuser ring
    Berkley C21-2 diffuser ring
    Pentair C21-2 diffuser ring
    C21-2 diffuser ring
    C212 diffuser ring
    C21 2 diffuser ring

    Size / measurement variations
    pump diffuser ring replacement
    water pump diffuser ring
    centrifugal pump diffuser ring

    Style variations
    diffuser ring
    pump diffuser ring
    water pump diffuser ring
    centrifugal pump component

    Material variations
    plastic diffuser ring
    pump internal component
    pump replacement part

Disclaimer: Seal House USA provides aftermarket replacement parts. Any OEM names are used strictly for cross-reference. We are an independent supplier.

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