Pool/Small Pump Seals

201c
201c
Mechanical Seal 201c — Type 166 (3/4″) | PS-201 Equivalent

Equal to industry standard 201. Direct-fit replacement for PS-201 single-spring seals in pool/spa and small-pump applications.

At-a-glance specs: 3/4″ shaft • 1.375″ × 0.406″ cup seat • Type 166 • Molded carbon/ceramic faces • Buna-N elastomers

Why choose 201 (PS-201)
Reliable everyday build for clean-water, standard-chemistry systems with quick, drop-in fit.

Upgrades / Variations (same footprint)
- 851 — Premium carbon face
- 3868 — Premium + Viton
- 201CV — Molded carbon
- 201CVSS — Silicon Carbide / Silicon Carbide / Viton®
Have questions? Check out our Pool/Spa Small Pump 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.

Please click “specifications” below for OEM numbers and Pump Nameplate Data
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201cv
201cv
Mechanical Seal 201cv — Type 166 / T-16 (3/4″) | PS-201V-CMS Equivalent

Equal to industry standard 201cv / PS-201V-CMS.
Direct-fit Type 166 / T-16 single-spring seal for pool/spa and small-pump applications—built with molded carbon/ceramic faces and Viton® elastomers for added chemical and temperature resistance.

At-a-glance specs: 3/4″ shaft • 1.375″ × 0.406″ cup seat • Molded carbon/ceramic faces • Viton/FKM elastomers

Why choose this 201cv (PS-201v-cms):
- Viton handles higher chlorine, heat, and chemicals better than Buna
- Proven T-16 footprint for quick, drop-in replacement
Upgrades / Alternatives (same footprint)
- 201c — Basic (Buna)
- 851 — Premium carbon face (Buna)
- 3868 — Premium + Viton (machined carbon)
- 201cvss — 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
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201cvss
201cvss
Mechanical Seal 201CVSS — Type 166 / T-16 (3/4″) | PS-201V-SC-SC Equivalent

Equal to industry standard 201CVSS / PS-201V-SC-SC.
Direct-fit Type 166 / T-16 single-spring seal for pool/spa and small-pump applications—engineered with hard faces and chemical-resistant elastomers for longer service life.

At-a-glance spec: 3/4″ shaft • 1.375″ × 0.406″ cup seat • Silicon Carbide / Silicon Carbide faces • Viton/FKM elastomers

Why choose 201CVSS:
- SiC/SiC faces provide excellent wear and heat resistance
- Viton handles higher chlorine, heat, and chemicals better than Buna
- T-16 footprint for quick, drop-in replacement
Variations (same footprint)
- 201c — Basic (Buna)
- 851 — Premium carbon face (Buna)
- 3868— Premium + Viton
- 201cv — Molded carbon
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
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3865
3865
Mechanical Seal 3865 — T-6A (5/8″) | PS-3865 Equivalent

Equal to industry standard 3865 / PS-3865.
Direct-fit T-6A single-spring seal for pool/spa and small-pump applications—upgraded with Viton elastomers and a machined carbon/ceramic face set for longer service life.

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

Why choose 3865 (PS-3865):
- T-6A footprint for quick, drop-in replacement
- Viton handles higher chlorine, heat, and chemicals better than Buna
- Machined carbon face for smoother sealing and stability
Upgrades / Alternatives (same footprint):
- 1000 — Basic
- 961 — Premium carbon face (Buna)
- 1000cv — Molded carbon
- 1000cvss — 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 for OEM numbers and Nameplate Data
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3866
3866
Mechanical Seal 3866 — Type 166 / T-16 (5/8″) | PS-3866 Equivalent

Equal to industry standard 3866 / PS-3866.
Direct-fit Type 166 / T-16 single-spring seal for pool/spa and small-pump applications—upgraded with Viton® elastomers and a machined carbon/ceramic face set for longer service life.

At-a-glance specs: 5/8″ shaft • 1.187″ × 0.343″ cup seat • Machined carbon/ceramic faces • Viton® elastomers

Why choose 3866 (PS-3866):
- T-16 footprint for quick, drop-in replacement
- Viton® handles higher chlorine, heat, and chemicals better than Buna
- Machined carbon face for smoother sealing vs. molded carbon
Upgrades / Alternatives (same footprint):
- 100 — Basic (Buna)
- 957 — Premium carbon face (Buna)
- 100cv — Molded carbon
- 100cvss — 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
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3867
3867
Mechanical Seal 3867 — Type 166 / T-16 (5/8″) | PS-3867 Equivalent

Equal to industry standard 3867 / PS-3867.
Direct-fit Type 166 / T-16 single-spring seal for pool/spa and small-pump applications—upgraded with Viton® elastomers and a machined carbon/ceramic face set for longer service life.

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

Why choose 3867 (PS-3867):
- Viton® handles higher chlorine, heat, and chemicals better than Buna
- Machined carbon face for smoother sealing vs. molded carbon
- T-16 footprint for fast, drop-in replacement
Upgrades / Alternatives (same footprint)
- 200 — Basic (Buna)
- 516 — Premium carbon face (Buna)
- 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
View Product
3868
3868
Mechanical Seal 3868 — Type 166 / T-16 (3/4″) | PS-3868 Equivalent

Equal to industry standard 3868 / PS-3868.

Direct-fit Type 166 / T-16 single-spring seal for pool/spa and small-pump applications—upgraded with Viton® elastomers and a machined carbon/ceramic face set for longer service life.

At-a-glance specs: 3/4″ shaft • 1.375″ × 0.406″ cup seat • Machined carbon/ceramic faces • Viton® elastomers

Why choose 3868 (PS-3868):

Viton® handles higher chlorine, heat, and chemicals better than Buna

Machined carbon face for smoother sealing vs. molded carbon

T-16 footprint for quick, drop-in replacement

Upgrades / Alternatives (same footprint)

201c — Basic (Buna)

851 — Premium carbon face (Buna)

201cv — Molded carbon (Viton)

201cvss — 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
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3890c
3890c
Mechanical Seal 3890 — Type 166 / T-16 | PS-3890 Equivalent

Equal to industry standard 3890 / PS-3890 / 200CSP.
Direct-fit crimped Type 166 / T-16 single-spring seal for pool/spa and small-pump applications—built for reliable everyday service.

At-a-glance specs:
5/8″ shaft • Cup seat: 1.381″ / 1.375″ × 0.406″ • Materials: Nitrile / Carbon / Ceramic

Why choose 3890:
- T-16 footprint for quick, direct replacement
- General-duty build for clean water and standard chemistry
- Proven performance in pool/spa and small circulation pumps
Upgrade / Variation
- 3890cv — same fit with machined carbon face for enhanced durability
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
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3890cv
3890cv
Mechanical Seal 3890V — Type 166 / T-16 (5/8″) | PS-3890V-CMS Equivalent

Equal to industry standard 3890V / PS-3890V-CMS.
Direct-fit Type 166 / T-16 single-spring seal for pool/spa and small-pump applications—upgraded with Viton® elastomers and a machined carbon/ceramic face set for longer service life.

At-a-glance specs: 5/8″ shaft • 1.381″ / 1.375″ × 0.406″ cup seat • Machined carbon/ceramic faces • Viton® elastomers

Why choose 3890V:

Viton® handles higher chlorine, heat, and chemicals better than Buna

Machined carbon face for smoother sealing and stability

T-16 footprint for quick, drop-in replacement

Variation (same footprint)

3890c — Carbon/Ceramic face set

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
View Product

201c

201c

Mechanical Seal 201c — Type 166 (3/4″) | PS-201 Equivalent

Please click “specifications” below for OEM numbers and Pump Nameplate Data

201cv

201cv

Mechanical Seal 201cv — Type 166 / T-16 (3/4″) | PS-201V-CMS Equivalent

Please click “specifications” below for OEM numbers and Pump Nameplate Data

201cvss

201cvss

Mechanical Seal 201CVSS — Type 166 / T-16 (3/4″) | PS-201V-SC-SC Equivalent

Please click “specifications” below for OEM numbers and Pump Nameplate Data

3865

3865

Mechanical Seal 3865 — T-6A (5/8″) | PS-3865 Equivalent

Please click “specifications for OEM numbers and Nameplate Data

3866

3866

Mechanical Seal 3866 — Type 166 / T-16 (5/8″) | PS-3866 Equivalent

Please click “specifications” below for OEM numbers and Pump Nameplate Data

3867

3867

Mechanical Seal 3867 — Type 166 / T-16 (5/8″) | PS-3867 Equivalent

Please click “specifications” below for OEM numbers and Pump Nameplate Data

3868

3868

Mechanical Seal 3868 — Type 166 / T-16 (3/4″) | PS-3868 Equivalent

Please click “specifications” below for OEM numbers and Pump Nameplate Data

3890c

3890c

Mechanical Seal 3890 — Type 166 / T-16 | PS-3890 Equivalent

Please click “specifications” below for OEM numbers and Pump Nameplate Data

3890cv

3890cv

Mechanical Seal 3890V — Type 166 / T-16 (5/8″) | PS-3890V-CMS Equivalent