Sta-Rite Gaskets
-
Sta-Rite / Berkeley / Pentair Diffuser Ring C21-10
Sta-Rite / Berkeley / Pentair Diffuser Ring C21-10
Sta-Rite / Berkeley / Pentair Diffuser C21-10 — Gasket / Seal Ring
Pre-cut diffuser seal ring (C21-10) is a direct replacement component designed for use in Sta-Rite, Berkeley, and Pentair pump systems to maintain proper flow and performance. 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
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
Sta-Rite C-20-103
Sta-Rite C-20-103
Item #SMSG 12B; SMSG 12BRR
Sta-Rite C-20-103 — 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)
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
Sta-Rite C-20-123
Sta-Rite C-20-123
Item #SMSG 12B; SMSG 12BRR-1
Sta-Rite 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-20-123 (C20123)
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
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
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
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
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
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
-