Sta-Rite Gaskets
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S05126 Volute GasketBerkeley & Sta-Rite
S05126 Volute GasketBerkeley & Sta-Rite
Item #SMSG 75
Berkeley / Sta-Rite S05126— Pre-Cut Gasket
The S05126 is a direct-fit volute gasket for Berkeley B-Series centrifugal pumps, cut from vegetable fibre to original specifications. The same part carries house numbers across the Pentair family — Berkeley S05126, Sta-Rite S05126, and Vak-Pak 9118.
Volute gaskets seal the joint between the pump case and the volute, and they are a one-use part. Reusing a compressed gasket after a rebuild is a slow leak waiting to happen, because the fibre has already taken its set and will not seal evenly a second time.
Lower your cost per gasket with quantity-based pricing—discounts are automatically applied at checkout as your order quantity increases. See the pricing table above.
Specs
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Berkeley Reference: S05126
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Sta-Rite Reference: S05126
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Inner Diameter: 9-1/8″ T
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Thickness: 1/32″
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Configuration: Volute, 8-hole
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Material: Vegetable fibre (vellumoid)
Applications
Fits Berkeley B-Series centrifugal pumps using the 9-1/8″ volute gasket, across the ZR and ZP model families. Also used in Sta-Rite and Vak-Pak pump assemblies under their own numbers. Confirm your gasket dimensions and hole count, or match your OEM number, before ordering. Not sure which gasket your pump takes? Call our seal specialists at 561-414-1046 — we’ll match it from your pump nameplate, no purchase required.
One teardown. Two wear parts.
The Berkeley S05126 volute gasket is the case gasket in the ZP-series Type B rebuild. Any time you’re in far enough to pull this gasket, the mechanical seal is already exposed — and a seal that has run against a worn sleeve will not re-seat. Doing the gasket alone means coming back for a second teardown.
Complete the rebuild:
• PS-185 Mechanical Seal — 1-1/4″ shaft, 1.875″ × 0.437″ seat, Type N-11 (Type C/21). Nitrile, Viton, and SiC/SiC options.• Berkeley Stainless Shaft Sleeve — the third wear item in this joint. Replace it with the seal, or the new faces wear early.Doing the full ZP-series job? Get the seal, sleeve, and this gasket together in the Berkeley ZP Series Pump Repair Kit — matched to the same service and shipped in one box.
Check your motor frame. This gasket is the same across the ZP range — the seal and sleeve are not. Frames 143JM to 215JM take the 1-1/4″ PS-185 and the S19310 sleeve. Frames 254JM and larger take the 1-3/4″ PS-446 and the S18869L sleeve. The model number alone won’t tell you which you have.
Not sure which seal size your pump takes? Call or text 561-414-1046 with your Berkeley model number and we’ll match the full set.
Explore our full lineup of Pre-cut Gaskets.
Looking for more? Check out our Pump Repair Kits , & Parts/Accessories
Have questions? Call us anytime-we’re here to help
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:
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Part: C21-10 Diffuser
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Also called: Diffuser gasket / seal ring
Compatibility:
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Motor range: ~1–2.5 HP diffuser applications
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Pump families: Sta-Rite / Berkeley / Pentair equivalents
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Also used on: Anthony centrifugal pool pumps (select models)
Why this part:
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Direct-fit profile for quick, reliable installs
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Consistent thickness for uniform sealing pressure
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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:
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Part: C21-2 Diffuser Ring
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Also called: D-Series Diffuser O-Ring / Gasket
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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
Sta-Rite / Pentair PW22-1Check Valve Flapper (Flapper Gasket)
Sta-Rite / Pentair PW22-1Check Valve Flapper (Flapper Gasket)
Item #SH-flapper
Sta-Rite / Pentair PW22-1 — Flapper Gasket
The replacement check valve flapper for Sta-Rite DPC Series pumps, Sta-Rite / Pentair part PW22-1. Commonly called a flapper gasket, and listed by the manufacturer as a check valve flapper — the same part under both names.
Lower your cost per gasket with quantity-based pricing—discounts are automatically applied at checkout as your order quantity increases. See the pricing table above.
Fits
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Brand: Sta-Rite / Pentair
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Part: PW22-1
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Series: DPC Series medium head centrifugal and self-priming utility pumps
Need Help?
Not sure this is your part? Send a photo of the old flapper and your pump model to info@sealhouseusa.com, or call or text 561-414-1046 — our specialists will confirm it. 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
Sta-Rite C20-103 Gasket
Sta-Rite C20-103 Gasket
Item #SMSG 12B
Sta-Rite C-20-103 — Pre-Cut Gasket (C20103 / C20123)
The Sta-Rite C-20-103 gasket is a high-quality replacement component designed for use in Sta-Rite pump systems. This gasket provides a reliable seal between mating surfaces, helping prevent leaks and maintain proper system performance.
Manufactured to meet original specifications, the C-20-103 gasket ensures a precise fit and dependable performance in demanding applications.
Lower your cost per gasket with quantity-based pricing—discounts are automatically applied at checkout as your order quantity increases. See the pricing table above.
Specs
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Dimensions: ID 3.125″ × OD 4.500″
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Material: 3/64″ vellumoid (vegetable fiber), brown (standard); Red Rubber
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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 C20-123 Gasket
Sta-Rite C20-123 Gasket
Item #SMSG 12BRR
Sta-Rite C-20-123 — Pre-Cut Gasket (C20103 / C20123)
The Sta-Rite C-20-123 gasket is a high-quality replacement gasket designed for use in Sta-Rite pump assemblies. This gasket helps provide a reliable seal between mating surfaces, preventing leaks and supporting proper pump performance during service or rebuilds.
This part is commonly referenced as C-20-123 or C20123
Manufactured for a clean fit and even compression, the C-20-123 gasket is designed for dependable performance in pump repair and maintenance applications.
Lower your cost per gasket with quantity-based pricing—discounts are automatically applied at checkout as your order quantity increases. See the pricing table above.
Specs
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Dimensions: ID 3.125″ × OD 4.500″
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Material: 3/64″ Red Rubber
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Cross-reference: Sta-Rite C-20-123 (C20123)
Explore our full lineup of Pre-cut Gaskets.
Looking for more? Check out our Mechanical Seals, Pump Repair Kits , & Parts/Accessories
Have questions? Call us anytime-we’re here to help
Sta-Rite C20-21 Gasket
Sta-Rite C20-21 Gasket
Item #SMSG 4
Sta-Rite C20-21 — Pre-Cut Gasket (C2021)
The Sta-Rite C20-21 gasket is a high-quality replacement gasket designed for use in Sta-Rite pump assemblies. This gasket helps provide a reliable seal between mating surfaces, preventing leaks and supporting proper pump performance during service or rebuilds.
This part is commonly referenced as C20-21 or C2021.
Manufactured for a clean fit and even compression, the C-20-21 gasket is designed for dependable performance in pump repair and maintenance applications.
Lower your cost per gasket with quantity-based pricing—discounts are automatically applied at checkout as your order quantity increases. See the pricing table above.
Specs
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Material: 3/64″ vellumoid (vegetable fiber), brown
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Dimensions: ID 6.375″ × OD 7.875″
Cross-reference
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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 C20-46 Gasket
Sta-Rite C20-46 Gasket
Item #SMSG 1
Sta-Rite C20-46 — Pre-Cut Gasket (C2046)
The Sta-Rite C20-46 gasket is a high-quality replacement gasket designed for use in Sta-Rite pump assemblies. This gasket helps provide a reliable seal between mating surfaces, preventing leaks and supporting proper pump performance during service or rebuilds.
This part is commonly referenced as C20-46 or C2046. Manufactured for a clean fit and even compression, the C20-46 gasket is designed for dependable performance in pump repair and maintenance applications.
Lower your cost per gasket with quantity-based pricing—discounts are automatically applied at checkout as your order quantity increases. See the pricing table above.
Specs
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Material: 3/64″ vellumoid (vegetable fiber), brown
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Dimensions: ID 7.937″ × OD 9.625″
Cross-reference
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Sta-Rite: C20-46 / C2046
Rebuilding a Sta-Rite D-series pump? The gasket 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 diffuser ring.
All four together in one part number:
Sta-Rite D-Series Pump Repair Kit — PS-3883 seal, C23-58 shaft sleeve, C21-2 diffuser ring and this 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 Mechanical Seals, Pump Repair Kits , & Parts/Accessories
Have questions? Call us anytime-we’re here to help
Sta-Rite C20-46N GasketRed Rubber
Sta-Rite C20-46N GasketRed Rubber
Item #smsg1RR
Sta-Rite C20-46N — Pre-Cut Red Rubber Gasket (C2046N)
A precision-cut replacement housing gasket for Sta-Rite pump assemblies, supplied in red rubber. Drops into the same housing as the C20-46 vellumoid gasket — 7.937″ inside diameter, 9.625″ outside — and is commonly searched as C2046N.
Red rubber or vellumoid?
Both seal the same joint and share the same ID and OD. The difference is how they get there.
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Red rubber (C20-46N) — resilient rather than crush-set. It conforms to flange faces that are pitted, scored or no longer true, and it survives being taken apart, so it usually comes out intact if you open the housing again. The choice for a pump that has been apart a few times
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Vellumoid (C-20-46) — the original-style 3/64″ brown fibre gasket. Crushes to the faces on assembly and seals hard. Fit once and replace at the next teardown.
At a Glance
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Material: Red rubber
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Inner diameter: 7.937″
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Outer diameter: 9.625″
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OEM reference: Sta-Rite C-20-46N
Need Help?
Not sure which material suits your housing? Call or text 561-414-1046, or email info@sealhouseusa.com — our specialists will advise. No purchase required.
Want the fibre gasket instead? The same footprint is available as the original-style 3/64″ brown vellumoid — it crushes to the flange faces rather than flexing, and it is what the D-series repair kit ships with.
Sta-Rite C-20-46 Gasket — vellumoid, same 7.937″ ID × 9.625″ OD
Rebuilding the whole pump? The gasket is one of four parts that come out at a standard seal service:
Sta-Rite D-Series Pump Repair Kit — PS-3883 seal, C23-58 shaft sleeve, C21-2 diffuser ring and C20-46 gasket
Not sure which material your housing needs? Call or text 561-414-1046 — no purchase required.
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