Pre-cut Gaskets

Hayward SPX3000T Gasket (G-345-9)
Hayward SPX3000T Gasket (G-345-9)
Hayward SPX3000T Gasket (G-345-9)— Pre-Cut Gasket

The Hayward SPX3000T gasket (G-345-9) is a high-quality replacement component designed for use in Hayward pump systems. This gasket provides a reliable seal between mating surfaces, helping prevent leaks and maintain proper system performance.

This part is also commonly referenced as G-345-9, making it a compatible replacement across multiple Hayward pump configurations.

Manufactured to meet original specifications, the SPX3000T gasket ensures a precise fit and dependable performance in pool and water circulation 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.

Cross-references
- SPX3000T gasket
- G-345-9 equivalent
Why choose this part:
- Direct-fit profile for quick, reliable installs
- Precision-cut for consistent thickness and sealing pressure
- Suitable for routine maintenance or full pump overhauls
Explore our full lineup of Pre-cut Gaskets.

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Weight .1 lbs

Dimensions 9 × 9 × 1 in
P57410 Volute Gasket (BG P57410)
P57410 Volute Gasket (BG P57410)
Bell & Gossett (B&G) Volute Gasket – P57410

The P57410 volute gasket (BG P57410) is a high-quality replacement gasket designed for use in Bell & Gossett pump systems. This gasket provides a reliable seal between the volute and pump housing, helping prevent leaks and maintain proper system pressure.

Manufactured to meet original specifications, the P57410 gasket ensures a precise fit and dependable performance in demanding pump 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.

Common applications (verify fit)
- Bell & Gossett PD-35 and PD-37
- Series 60 “AA”
- 1522 series
- Some MF-60 applications (commonly referenced for 5-1/4″ and 6-1/4″ impeller versions)
- Often cross-referenced for select Series 90 “AA”, 1535, and 2522 applications (confirm with pump model/parts breakdown)
Explore our full lineup of Pre-cut Gaskets.

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Weight .1 lbs

Dimensions 9 × 9 × 1 in
S05126 Volute Gasket — Berkeley & Sta-Rite
S05126 Volute Gasket — Berkeley & 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
- Berkeley Reference: S05126
- Sta-Rite Reference: S05126
- Inner Diameter: 9-1/8″ T
- Thickness: 1/32″
- Configuration: Volute, 8-hole
- 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

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Weight .1 lbs

Dimensions 13 × 13 × 1 in
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
Weight .1 lbs

Dimensions 9 × 9 × 1 in
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
Weight .1 lbs

Dimensions 9 × 9 × 1 in
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
- 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.

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Weight .1 lbs

Dimensions 10 × 10 × 1 in
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
- Dimensions: ID 3.125″ × OD 4.500″
- Material: 3/64″ Red Rubber
- Cross-reference: Sta-Rite C-20-123 (C20123)
Explore our full lineup of Pre-cut Gaskets.

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Weight .1 lbs

Dimensions 11 × 11 × 1 in
Sta-Rite C20-21 Gasket
Sta-Rite C20-21 Gasket

Item #SMSG 4
Sta-Rite C-20-21 — Pre-Cut Gasket (C2021)

The Sta-Rite C-20-21 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 C-20-21 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
- 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.

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Weight .1 lbs

Dimensions 11 × 11 × 1 in
Sta-Rite C20-46 Gasket
Sta-Rite C20-46 Gasket

Item #SMSG 1
Sta-Rite C-20-46 — Pre-Cut Gasket (C2046)

The Sta-Rite C-20-46 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 C-20-46 or C2046. Manufactured for a clean fit and even compression, the C-20-46 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
- 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 Mechanical Seals, Pump Repair Kits , & Parts/Accessories

Have questions? Call us anytime-we’re here to help
Weight .1 lbs

Dimensions 11 × 11 × 1 in