Gaskets

6in Full Face Flange GasketRed Rubber 150#/125#, 1/8in Thick, 11in OD
6in Full Face Flange GasketRed Rubber 150#/125#, 1/8in Thick, 11in OD

Item #SH-FF-600
A 6 inch full face gasket in 1/8 in. red rubber, cut to ASME B16.21 for 150 lb flanges. Pipe size is a name, not a measurement — 6 in. pipe is 6-5/8 in. across the outside, which is why the bore reads 6-5/8 in. and the outer edge 11 in.
Measure across your flange face — if it reads 11 in., this is your gasket.

Fits pipe size — 6 in. nominal

Outside diameter — 11 in. (matches the flange face)

Bolt holes — 8, at 7/8 in.

Bolt circle — 9-1/2 in.

Bore — 6-5/8 in.

Thickness — 1/8 in.

Material — red rubber (SBR), 70 Shore A, -20°F to 180°F

Flange class — 150 lb steel or 125 lb cast iron
Fits 150 lb steel and 125 lb cast iron flanges — Class 125 and Class 150 share the same bolt pattern, so one gasket covers both. A Class 300 flange is wider on a different bolt circle and takes a different gasket. Red rubber (SBR) suits water, brine, air and low-pressure service; for oil, fuel, solvents or acids ask for Buna, Viton, EPDM or non-asbestos.

Where a 6 in. goes. Irrigation and fire mainlines, municipal and HVAC chilled-water lines, and the suction side of larger pumps — a pump with a 4 in. discharge usually takes a 6 in. suction, so the two sizes often go in together. Same 7/8 in. bolts as the 5 in., on a bolt circle an inch larger.
Flanging up a whole pump?The suction flange is normally a size or two bigger than the discharge, so a 6in rarely goes in on its own.

4in Full Face Flange Gasket — 9in OD, 8 bolt holes at 3/4in

5in Full Face Flange Gasket — 10in OD, 8 bolt holes at 7/8in

Need another size, a different thickness or Buna, Viton, EPDM or neoprene? We cut the full range 1-1/4in to 12in — call or text 561-414-1046 with your flange dimensions.
Weight .4 lbs

Dimensions 12 × 12 × .25 in
8in Full Face Flange GasketRed Rubber 150#/125#, 1/8in Thick, 13-1/2in OD
8in Full Face Flange GasketRed Rubber 150#/125#, 1/8in Thick, 13-1/2in OD

Item #SH-FF-800
An 8 inch full face gasket in 1/8 in. red rubber, cut to ASME B16.21 for 150 lb flanges. Pipe size is a name, not a measurement — 8 in. pipe is 8-5/8 in. across the outside, which is why the bore reads 8-5/8 in. and the outer edge 13-1/2 in.
Measure across your flange face — if it reads 13-1/2 in., this is your gasket.

Fits pipe size — 8 in. nominal

Outside diameter — 13-1/2 in. (matches the flange face)

Bolt holes — 8, at 7/8 in.

Bolt circle — 11-3/4 in.

Bore — 8-5/8 in.

Thickness — 1/8 in.

Material — red rubber (SBR), 70 Shore A, -20°F to 180°F

Flange class — 150 lb steel or 125 lb cast iron
Fits 150 lb steel and 125 lb cast iron flanges — Class 125 and Class 150 share the same bolt pattern, so one gasket covers both. A Class 300 flange is wider on a different bolt circle and takes a different gasket. Red rubber (SBR) suits water, brine, air and low-pressure service; for oil, fuel, solvents or acids ask for Buna, Viton, EPDM or non-asbestos.

Where an 8 in. goes. Large pump volutes, municipal water and wastewater mains, fire risers and chilled-water headers in bigger buildings. It is the last size in the range with eight bolts — the 10 in. and 12 in. step up to twelve, so if you are counting twelve holes on your flange you are above an 8 in.
Flanging up a whole pump?The suction flange is normally a size or two bigger than the discharge, so an 8in rarely goes in on its own.

6in Full Face Flange Gasket — 11in OD, 8 bolt holes at 7/8in

4in Full Face Flange Gasket — 9in OD, 8 bolt holes at 3/4in

Need another size, a different thickness or Buna, Viton, EPDM or neoprene? We cut the full range 1-1/4in to 12in — call or text 561-414-1046 with your flange dimensions.
Seal House USA provides aftermarket replacement parts. Any OEM names are used strictly for cross-reference. We are an independent supplier.
Weight .25 lbs

Dimensions 15 × 15 × .25 in
Aermotor 27749 Gasket
Aermotor 27749 Gasket

Item #SMSG 64
Aermotor 27749 — Pre-Cut Gasket

Aermotor 27749 gasket is a direct replacement sealing solution designed for reliable performance in pump applications. Pre-cut housing/volute gasket for Aermotor pump assemblies. Precision-cut to seat cleanly and compress evenly—helping prevent leaks during routine service or rebuilds.

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 7.750″ × OD 9.562″
Cross-reference
- Aermotor: 27749 (also searched as “Aeromotor 27749”
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 10 × 10 × 1 in
Berkeley 6 x 6-7/8 Gasket
Berkeley 6 x 6-7/8 Gasket

Item #SMSG 57
Berkeley 6″ × 6-7/8″ — Pre-Cut Gasket

Berkeley gasket 6×6-7/8 is a replacement gasket designed for reliable sealing in pump and water transfer applications. Pre-cut housing/volute gasket for Berkeley pump assemblies this gasket is 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 6.000″ × OD 6.875″
Cross-reference
- Berkeley gasket: 6 × 6-7/8 spec
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 11 × 11 × 1 in
Berkeley S04757 Volute Gasket
Berkeley S04757 Volute Gasket

Item #SMSG 74
Berkeley S04757 Volute Gasket — Pre-Cut (S-04757)

The Berkeley S04757 gasket is a pre-cut volute gasket for Berkeley centrifugal pump service, equivalent to Berkeley part number S-04757. Cut from vellumoid fiber to seat cleanly against the volute face and compress evenly, it holds a positive seal through routine rebuilds without cold-flowing or tearing on removal.

Specs
- Material: 3/64″ vellumoid (vegetable fiber), brown
- Dimensions: ID 6.625″ (6-5/8″) × OD 7.625″ (7-5/8″)
Cross-Reference: Berkeley S04757

Volute gaskets are a wear item — any time a Berkeley pump comes apart for an impeller, wear plate, or mechanical seal replacement, the volute gasket should be replaced rather than reused. A compressed fiber gasket that has already taken a set will not re-seal reliably, and a weeping volute joint on an irrigation or transfer pump is a slow leak that gets blamed on the shaft seal.

Rebuilding the whole wet end? Pair this gasket with the matching mechanical seal — call or text us with your Berkeley model number and we’ll match the full kit.

One teardown. Two wear parts.

The Berkeley S04757 volute gasket is the case gasket in the 1-1/4″ 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 1-1/4″ Type B job? Get the seal, sleeve, and this gasket together in the Berkeley TP Series Pump Repair Kit — matched to the same service and shipped in one box.

Running a 1-3/4″ seal size? Larger Type B models take a bigger seal in the same volute joint. Check your motor frame to confirm. The PS-446 is our 1-3/4″ single spring seal — and covers Berkeley B3TPMS among others. Check your nameplate before ordering.

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 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
Flint & Walling 125994 Gasket
Flint & Walling 125994 Gasket

Item #SMSG 30
Flint & Walling 125994 Gasket (FW 125994)

The Flint & Walling 125994 gasket (FW 125994) is a high-quality replacement gasket designed for use in Flint & Walling 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 125994 gasket ensures a precise fit and dependable performance in demanding environments.

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 5.125″ × OD 8.375″
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
Flint & Walling 132429 Gasket (FW 132429)
Flint & Walling 132429 Gasket (FW 132429)
Flint & Walling 132429 Gasket (FW 132429)

The Flint & Walling 132429 gasket (FW 132429) is a high-quality replacement gasket designed for use in Flint & Walling 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 132429 gasket ensures a precise fit and dependable performance in demanding environments.

*Typically sold with SP Diffuser Ring

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-reference
- Flint & Walling 132429 gasket
Dimensions
- Inside diameter (ID): 171.05 mm
- Cross-section: 3 mm wide × 4.5 mm tall (measured with the ring standing vertically on a flat surface)
Why choose this part:
- Precise, pre-cut profile for consistent sealing
- Smooth edges for easier alignment and reassembly
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 9 × 9 × 1 in
Flint & Walling 133261 Gasket (FW 133261)
Flint & Walling 133261 Gasket (FW 133261)
Flint & Walling 133261 Gasket (FW 133261)—Pre-Cut Gasket

The Flint & Walling 133261 gasket (FW 133261) is a high-quality replacement gasket designed for use in Flint & Walling 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 133261 gasket ensures a precise fit and dependable performance in demanding environments.

*Typically sold with SPJ Diffuser Ring

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-reference
- Fling & Walling 133261 gasket
Why choose this part:
- Direct-fit profile for quick, reliable installation
- Precision-cut for consistent thickness and sealing pressure
- Smooth edges for easier alignment and reassembly
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 10 × 10 × 1 in
Flint & Walling SP Diffuser Ring 132428
Flint & Walling SP Diffuser Ring 132428
Flint & Walling SP Diffuser Ring 132428 — Pre-Cut Gasket

The Flint & Walling diffuser ring 132428 is a high-quality replacement component designed for use in SP pump systems. This diffuser ring plays a key role in maintaining proper internal clearances and supporting efficient water flow within the pump.

Manufactured to meet original specifications, these diffuser rings ensure a precise fit and reliable 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.

Cross-references
- Flint & Walling SP Diffuser Ring: 132428 (typically sold with Flint & Walling 132429)
Photo note
- SPJ is shown on the left; SP is on the right.
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 9 × 9 × 1 in