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All Single Spring Seals

  • N22 PS replacement mechanical seal

    4518c Mechanical Seal (PS-4518)- 3/4″

    4518c Mechanical Seal (PS-4518)- 3/4″

    Item #N/A

    Single Spring Mechanical Seal 4518c | PS-4518 Equivalent

    4518c single spring mechanical seal, PS-4518 / 4518 equivalent. Fits 3/4″ shaft with 1.375″× 0.405″ cup seat, 1.197″ rotary OD, 1.375″ working length, and Type N-22 rotary head.

    Shaft size: 3/4″ • Seat: 1.375″ × 0.405″ cup • Rotary OD: 1.197″ • Working length: 1.375″

    Crimped rotary head type N-22. Utilized in centrifugal pumps, mixers, rotating equipment, and further apparatus.

    Interchange / replacements:

    • Equivalent to Pac-Seal T-21 (long working length) and Burgmann MG9

    • Can replace Type E and Type 1 in many applications (confirm dimensions)

    Design & construction:

    • Electro-polished 304 stainless steel metal parts

    • Elastomeric bellows for stable sealing and easy installation

    • Independent of shaft rotation

    Material options (select above):

    • CAR/CER/NIT — Carbon/Ceramic, Nitrile elastomers

    • CAR/CER/VIT — Carbon/Ceramic, Viton elastomers

    • SIC/SIC/VIT — Silicon Carbide/Silicon Carbide, Viton elastomers

    Have questions? Check out our Single Spring Seal Guide  or call us anytime—we’re here to help.

    Explore our full lineup of Single Spring Seals—PS replacements, pool/spa seals, and our SPS line.

    Looking for more? Shop Pump Repair Kits, Parts & Accessories, and  Gaskets.

    Please click “specifications” below for OEM numbers and Pump Nameplate Data
    Weight .35 lbs
    Dimensions 1.75 × 1.75 × 2 in
  • N22 PS replacement mechanical seal

    479c Mechanical Seal (PS-479) – 2″

    479c Mechanical Seal (PS-479) – 2″

    Item #N/A

    Single Spring Mechanical Seal 479c | PS-479 Equivalent

    479c single spring mechanical seal, PS-479 / 479 equivalent. Fits 2″ shaft with 2.750″× 0.500″ cup seat and Type N-22 rotary head.

    Shaft size: 2.000″ • Seat: 2.750″ × 0.500″ cup • Rotary OD: 2.587″ • Working length: 2.125″

    Crimped rotary head type N-22. Utilized in centrifugal pumps, mixers, rotating equipment, and further apparatus.

    Interchange / replacements:

    • Equivalent to Pac-Seal T-21 (long working length) and Burgmann MG9

    • Can replace Type E and Type 1 in many applications (confirm dimensions)

    Design & construction:

    • Electro-polished 304 stainless steel metal parts

    • Elastomeric bellows for stable sealing and easy installation

    • Independent of shaft rotation

    Material options (select above):

    • CAR/CER/NIT — Carbon/Ceramic, Nitrile elastomers

    • CAR/CER/VIT — Carbon/Ceramic, Viton elastomers

    • SIC/SIC/VIT — Silicon Carbide/Silicon Carbide, Viton elastomers

    Have questions? Check out our Single Spring Seal Guide  or call us anytime—we’re here to help.

    Explore our full lineup of Single Spring Seals—PS replacements, pool/spa seals, and our SPS line.

    Looking for more? Shop Pump Repair Kits, Parts & Accessories, and  Gaskets.

    Please click “specifications” below for OEM numbers and Pump Nameplate Data
    Weight .9 lbs
    Dimensions 3 × 3 × 2.75 in
  • Buy PS-4801

    4801 Mechanical Seal (PS-4801)— 2-1/2″

    4801 Mechanical Seal (PS-4801)— 2-1/2″

    Single Spring Mechanical Seal 4801 | PS-4801 Equivalent

    Direct-fit aftermarket G-Type replacement mechanical seal equal to industry standard 4801 / PS-4801. Built to the 2-1/2″ John Crane 2100 style for reliable, leak-tight pump performance

    Key specs: • Shaft size: 2-1/2″ (2.500″) single spring seal • Seat: 3.375″ × 0.562″ • Rotary OD: 3.268″ • Working length: 1.299″

    Material build: SIC / SIC / VIT — Silicon Carbide vs. Silicon Carbide faces; Viton elastomers
    (Many OEM builds use a carbon rotary—this version is upgraded to SiC/SiC for longer life.)

    Seat style

    • Notched O-ring seat — Hydromatic upper configuration

    Explore our full lineup of Single Spring Seals—PS replacements, pool/spa seals, and our SPS line.

    Looking for more? Shop Pump Repair Kits, Parts & Accessories, and Pre-Cut Gaskets.

    Please click “specifications” below for OEM numbers and Pump Nameplate Data
    Weight .5 lbs
    Dimensions 3.5 × 3.5 × 2 in
  • buy PS-514 Pump Seal

    514c Mechanical Seal (PS-514) – 1-5/8″

    514c Mechanical Seal (PS-514) – 1-5/8″

    Item #N/A

    Single Spring Mechanical Seal 514C — 1-5/8″ | PS-514 Equivalent

    514c single spring mechanical seal, PS-514 / 514 equivalent. Fits 1-5/8″ shaft with 2.37″× 0.500″ seat and Type N-33 tapered-spring rotary head.

    Typical applications: Centrifugal pumps, mixers, and other rotating equipment.

    Key specs: Shaft size: 1-5/8″ single spring seal • Seat: 2.37″ x 0.500″ • Rotary OD: 2.185″ • Working length: 1.375″

    Design & construction:
    Crimped rotary head (Type N-33)—equivalent to Pac-Seal T-21 (tapered spring) and Burgmann MG9, can replace seal type D & 2 type seal heads. Tapered spring for wide base to fit over impeller hub or other similar feature. Electro-polished 304 stainless steel metal parts. Elastomeric bellows. Non-directional (independent of shaft rotation).

    Materials available (choose from dropdown)

    • CAR/CER/NIT — Carbon vs. Ceramic faces, Nitrile elastomers

    • CAR/CER/VIT — Carbon vs. Ceramic faces, Viton elastomers

    • SIC/SIC/VIT — Silicon Carbide vs. Silicon Carbide faces, Viton elastomers

    Have questions? Check out our Single Spring Seal Guide  or call us anytime—we’re here to help.

    Explore our full lineup of Single Spring Seals—PS replacements, pool/spa seals, and our SPS line.

    Looking for more? Shop Pump Repair Kits, Parts & Accessories, and  Gaskets.

    Please click “specifications” below for OEM numbers and Pump Nameplate Data
    Weight .9 lbs
    Dimensions 2.5 × 2.5 × 2 in
  • ps-100 , ps-200 , ps-201 mechanical seal

    516 Mechanical Seal (PS-516) — 5/8″

    516 Mechanical Seal (PS-516) — 5/8″

    Mechanical Seal 516 — Type 166 / T-16 (5/8″) | PS-516 Equivalent

    Equal to industry standard 516 / PS-516.
    Direct-fit Type 166 / T-16 single-spring seal for pool/spa and small-pump applications—built with a machined carbon/ceramic face set and Buna-N elastomers for dependable everyday service.

    At-a-glance specs: 5/8″ shaft • 1.25″ × 0.406″ cup seat • Machined carbon/ceramic faces • Buna-N elastomers

    Why choose 516 (PS-516):

    • T-16 footprint for quick, drop-in replacement

    • Machined carbon face for smoother sealing vs. molded carbon

    • Reliable materials for standard pool/spa chemistry

    Upgrades / Variations (same footprint)

    •  200 — Basic (Buna)

    • 3867 — Premium + Viton

    • 200cv — Molded carbon

    • 200cvss — Silicon Carbide / Silicon Carbide / Viton

    Explore our full lineup of Single Spring Seals—PS replacements, pool/spa seals, and our SPS line.

    Looking for more? Shop Pump Repair Kits, Parts & Accessories, and Pre-Cut Gaskets.

    Have questions? Check out our Pool/Spa Small Pump Guide or call us anytime—we’re here to help.

    Please click “specifications” below for OEM numbers and Pump Nameplate Data
    Weight .25 lbs
    Dimensions 1.5 × 1.5 × 1.25 in
  • N22 PS replacement mechanical seal

    523c Mechanical Seal (PS-523) – 1-7/8″

    523c Mechanical Seal (PS-523) – 1-7/8″

    Item #N/A

    Single Spring Mechanical Seal 523c | PS-523 Equivalent

    523c single spring mechanical seal, PS-523 / 523 equivalent. Fits 1-7/8″ shaft with 2.625″× 0.500″ cup seat, and Type N-22 rotary head.

    Key specs: Shaft size: 1-7/8″ single spring seal • Seat: 2.625″ x 0.500″ • Rotary OD: 2.520″• Working length: 2.125″

    Crimped rotary head type N-22. Utilized in centrifugal pumps, mixers, rotating equipment, and further apparatus.

    Interchange / replacements:

    • Equivalent to Pac-Seal T-21 (long working length) and Burgmann MG9

    • Can replace Type E and Type 1 in many applications (confirm dimensions)

    Design & construction:

    • Electro-polished 304 stainless steel metal parts

    • Elastomeric bellows for stable sealing and easy installation

    • Independent of shaft rotation

    Material options (select above):

    • CAR/CER/NIT — Carbon/Ceramic, Nitrile elastomers

    • CAR/CER/VIT — Carbon/Ceramic, Viton elastomers

    • SIC/SIC/VIT — Silicon Carbide/Silicon Carbide, Viton elastomers

    Have questions? Check out our Single Spring Seal Guide  or call us anytime—we’re here to help.

    Explore our full lineup of Single Spring Seals—PS replacements, pool/spa seals, and our SPS line.

    Looking for more? Shop Pump Repair Kits, Parts & Accessories, and  Gaskets.

    Please click “specifications” below for OEM numbers and Pump Nameplate Data
    Weight .9 lbs
    Dimensions 2.75 × 2.75 × 2.75 in
  • N22 PS replacement mechanical seal

    537c Mechanical Seal (PS-537) – 2-1/8″

    537c Mechanical Seal (PS-537) – 2-1/8″

    Item #N/A

    Single Spring Mechanical Seal 537c | PS-537 Equivalent

    537c single spring mechanical seal, PS-537 / 537 equivalent. Fits 2-1/8″ shaft with 3.000″× 0.562″ cup seat, and Type N-22 rotary head.

    Key specs: Shaft size: 2-1/8″ single spring seal • Seat: 3.000″ x 0.562″ cup • Rotary OD: 2.776″ • Working length: 2.375″

    Crimped rotary head type N-22. Utilized in centrifugal pumps, mixers, rotating equipment, and further apparatus.

    Interchange / replacements:

    • Equivalent to Pac-Seal T-21 (long working length) and Burgmann MG9

    • Can replace Type E and Type 1 in many applications (confirm dimensions)

    Design & construction:

    • Electro-polished 304 stainless steel metal parts

    • Elastomeric bellows for stable sealing and easy installation

    • Independent of shaft rotation

    Material options (select above):

    • CAR/CER/NIT — Carbon/Ceramic, Nitrile elastomers

    • CAR/CER/VIT — Carbon/Ceramic, Viton elastomers

    • SIC/SIC/VIT — Silicon Carbide/Silicon Carbide, Viton elastomers

    Have questions? Check out our Single Spring Seal Guide  or call us anytime—we’re here to help.

    Explore our full lineup of Single Spring Seals—PS replacements, pool/spa seals, and our SPS line.

    Looking for more? Shop Pump Repair Kits, Parts & Accessories, and  Gaskets.

    Please click “specifications” below for OEM numbers and Pump Nameplate Data
    Weight .9 lbs
    Dimensions 3.25 × 3.25 × 3 in
  • PS-6261 mechanical seal

    6261 Mechanical Seal (PS-6261)— 1-1/4″

    6261 Mechanical Seal (PS-6261)— 1-1/4″

    Single Spring Mechanical Seal 6261 | PS-6261 Equivalent

    Direct-fit G-Type mechanical seal replacement equal to industry standard 6261 / PS-6261. Designed to the John Crane 2100 style for reliable, leak-tight performance in common pump service applications.

    Key specs: • Shaft size: 1-1/4″ (1.250″) single spring seal • Seat: 1.875″ x 0.437″ • Rotary OD: 1.811″ • Working length: 1.062″

    Material build: BUNA / CAR / CER — Buna-N elastomers; Carbon vs. Ceramic faces

    Compatible components: Often paired with sleeve/adapter components referenced as

    • Sta-Rite DHH-169 sleeve

    • Berkeley 13910 sleeve

    Explore our full lineup of Single Spring Seals—PS replacements, pool/spa seals, and our SPS line.

    Looking for more? Shop Pump Repair Kits, Parts & Accessories, and Pre-Cut Gaskets.

    Please click “specifications” below for OEM numbers and Pump Nameplate Data
    Weight .3 lbs
    Dimensions 2.25 × 2.25 × 1.75 in
  • 4240c mechanical seal is a direct-fit 5/ seal, the PS-4240 equivalent, cross-referenced to Goulds 10K10. ps-680c

    680c / 702c Mechanical Seal (PS-680 / PS-702) — 5/8″

    680c / 702c Mechanical Seal (PS-680 / PS-702) — 5/8″

    Item #N/A

    680c / 702c Mechanical Seal (PS-680 / PS-702) — 5/8″

    The 680c / 702c mechanical seal is a direct-fit 5/8″ shaft seal, the PS-680 and PS-702 equivalent. It is built to OEM-equivalent standards or higher with a Type 166 footprint and a quality molded carbon face for dependable pool, spa, and small-pump service. Available in multiple material builds — see the options below.

    Molded Carbon Face 
    This 680c / 702c uses a quality molded carbon face — a dependable build for pool, spa, and small-pump service, with smooth sealing and reliable life. For the premium machined carbon version, see our 4240c / Goulds 10K10 seal.

    Drop-in equivalent for common Type 16, G, A, 6, AV, 2100 styles.
    Built for pool/spa and small-pump service with a precision finish and OEM-friendly dimensions.

    At-a-glance specs: 5/8″ shaft • 1.187″ × 0.288″ cup seat (verify seat thickness) • Type 166 footprint

    Cross Reference: Replaces PS-702, PS-4462, PS-518, PS-701, PS-4284.

    Material options (select from dropdown)

    • CAR/CER/NIT — Standard build with machined carbon vs. ceramic, Nitrile elastomers.

    • CAR/CER/VIT — Same machined carbon/ceramic with Viton for higher chlorine, temperature, and chemicals.

    • SIC/SIC/VIT — Silicon Carbide vs. Silicon Carbide with Viton for maximum wear and heat resistance.

    • CAR/SIC/VIT — Direct replacement choice for PS-4284.

    Have questions? Check out our Single Spring Seal Guide  or call us anytime—we’re here to help.

    Explore our full lineup of Single Spring Seals—PS replacements, pool/spa seals, and our SPS line.

    Looking for more? Shop Pump Repair Kits, Parts & Accessories, and Pre-Cut Gaskets.

    Please click “specifications” below for OEM numbers and Pump Nameplate Data
    Weight .25 lbs
    Dimensions 1.5 × 1.5 × 1.25 in