All Single Spring Seals
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Single Spring Mechanical Seal 3883 | PS-3883 Equivalent (G-Type / 2100 Style)
Single Spring Mechanical Seal 3883 | PS-3883 Equivalent (G-Type / 2100 Style)
View ProductSingle Spring Mechanical Seal 3883 | PS-3883 Equivalent
Direct-fit aftermarket G-Type mechanical seal equal to industry standard 3883 / PS-3883, designed in the John Crane 2100 / 2106 style for reliable, leak-tight performance. Commonly found in applications referencing Sta-Rite/Pentair OEM numbers and specific pump models (example listing: STA-RITE DHJ3-170MS3).
Key specs: • Shaft size: : 1-1/4″ (1.250″) single spring seal • Seat: 1.875″ x .0437″ • Rotary OD: 1.811″ • Working length: 1.024″
OEM cross references shown/commonly used
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U9-433SS (Sta-Rite / Pentair reference)
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U109-220
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U90451SS (Viton material version reference)
***Please note: At Seal House, we have seen this seal in pumps where OEM manual states U109-220 or U90451SS. U90451SS is 3883 in viton material. Our standard replacement is 3883, for non chemical applications and temperatures below 220°F . For chemical service or temperatures above 220°F, you need 3883 with viton material, which is equivalent to OEM U90451SS. Please contact us for viton pricing and delivery
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
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Single Spring Mechanical Seal 3992 | PS-3992 Equivalent (G-Type / 2100)
Single Spring Mechanical Seal 3992 | PS-3992 Equivalent (G-Type / 2100)
View ProductSingle Spring Mechanical Seal 3992 | PS-3992 Equivalent
Direct-fit aftermarket replacement G-Type mechanical seal equal to industry standard 3992 / PS-3992, built in the John Crane 2100 / 2106 style for reliable, leak-tight performance in common pump services. Designed for use with a 1-1/2″ cup seat and matches configurations commonly used in 2100S 38mm rotary assemblies.
Key specs: • Shaft size: 1-1/2″ (1.500″) single spring seal • Seat (mating ring): 2.125″ x 0.437″• Rotary OD: 2.125″ • Working length: 1.181″
Material build: Carbon/Viton (FKM)— Viton elastomers with Carbon rotary face (typical PS-3992/VCFJF listings)
Compatible components
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Designed for use with 1-1/2″ cup seat. Matches configurations used in 2100S 38MM rotary assemblies.
Please click “specifications” below for OEM numbers and Pump Nameplate Data
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.
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Single Spring Mechanical Seal 4357 | PS-4357 Equivalent (G-Type / 2100)
Single Spring Mechanical Seal 4357 | PS-4357 Equivalent (G-Type / 2100)
View ProductSingle Spring Mechanical Seal 4357 | PS-4357 Equivalent
Direct-fit G-Type replacement equal to industry standard 4357 / PS-4357. Designed to the John Crane 2100 style for reliable, leak-tight performance. Configured with an EPDM/Carbon/Silicon Carbide face combination, ideal for demanding pump applications.
This seal is supplied with a #129 L-shaped O-ring (75 duro) for proper sleeve fit. Unlike some OEM designs that use an offset/center-mount seat O-ring, this PS-style seal uses a bottom-mount seat O-ring layout for easier installation and direct compatibility.
Key specs: • Shaft size: 2.000″ single spring seal • Seat: 2.75″ x 0.500″ • Rotary OD: 2.598″ • Working length: 1.500″
Material build: Carbon/Silicon Carbide/EPDM (Carbon, Silicon Carbide faces, EPDM elastomers)
Fitment &Applications:
Compatible with a variety of pump models including:-
VSX-VSC 8.125 (4 x 6 x 10.5B RHR, 10 HP)
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VSX-VSH 10.5 (6 x 8 x 10.5 RHR, 75 HP)
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VSX-VSC 9.375 (5 x 6 x 10.5B)
Cross Reference:
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OEM Part Number: P5001889
Please click “specifications” below for OEM numbers and Pump Nameplate Data
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.
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Single Spring Mechanical Seal 4490 | PS-4490 Equivalent (G-Type / 2100)
Single Spring Mechanical Seal 4490 | PS-4490 Equivalent (G-Type / 2100)
View ProductSingle Spring Mechanical Seal 4490 | PS-4490 Equivalent
Direct-fit G-Type mechanical seal replacement equal to industry standard 4490 and PS-4490. Built to the John Crane 2100 style for reliable, leak-tight performance in commercial HVAC/hydronic pump service.
Key specs: • Shaft size: 2-1/2″ (2.500″) single spring seal • Seat: 3.375″ × 0.562″ • Rotary OD: 3.268″ • Working length: 1.811″
Standard material build: SIC / SIC / VIT — Silicon Carbide vs. Silicon Carbide faces; Viton/FKM elastomers (Many OEM builds use a carbon rotary—this version is upgraded to SiC/SiC for longer life.)
Fitment / notes
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VSX 8×6 series; OEM reference: P5001086 , P5001891
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Sleeve uses #140 O-ring
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
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Single Spring Mechanical Seal 4801 | PS-4801 Equivalent (G-Type / 2100)
Single Spring Mechanical Seal 4801 | PS-4801 Equivalent (G-Type / 2100)
View ProductSingle 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
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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
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Single Spring Mechanical Seal 6261 | PS-6261 Equivalent (G-Type / 2100)
Single Spring Mechanical Seal 6261 | PS-6261 Equivalent (G-Type / 2100)
View ProductSingle 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
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Sta-Rite DHH-169 sleeve
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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
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SPS-205
SPS-205
Item #N/A
View ProductSingle Spring Mechanical Seal SPS-205 | PS-205 Equivalent
Equal to industry standard number 205 / PS-205
Typical applications: Centrifugal pumps, mixers, and other rotating equipment.
Key specs: Shaft size: 1-3/4″ single spring seal • Seat: 2.500″ x 0.500″ • Rotary OD: 2.402″ • Working length: 2.000″
Design & construction:
Rotary head Type E/1. Electro-polished 316 stainless steel metal parts. Elastomeric bellows. Non-directional (independent of shaft rotation).Materials available (choose from dropdown)
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CAR/CER/NIT — Carbon vs. Ceramic faces, Nitrile elastomers
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CAR/CER/VIT — Carbon vs. Ceramic faces, Viton/FKM elastomers
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SIC/SIC/VIT — Silicon Carbide vs. Silicon Carbide faces, Viton/FKM elastomers
Please click “specifications” below for OEM numbers and Pump Nameplate Data
Both PS replacements? Which should I choose? Check out more on our Seal House Seal Guide
Seal Model Product Line Replaces Features & Focus 205C N Line PS-514 Easy installation & broad compatibility SPS-205 SPS Line PS-514 Premium build for longevity & like for like replacement.
SPS Line
Same Fit. Lasting Reliability.
Our SPS single-spring seals are like-for-like replacements for industry-standard E/1, D/2, and C/21 heads—delivering the same fit and function with upgraded materials designed for extended service life.
What sets SPS apart:
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Heavier elastomer bellows for improved structural integrity and stability under pressure
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Resin-impregnated, abrasion-resistant carbon faces — double-density carbon designed for enhanced hardness and durability
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316/304 stainless steel components for superior corrosion protection across E/1, D/2, and C/21 head styles
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Precision-finished rotary heads with a brushed appearance for a high-quality machined look and consistent sealing performance
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Built to exacting standards for dependable performance across a wide range of pump applications
Engineered to rigorous standards, SPS seals provide a durable, dependable alternative to common aftermarket or OEM options—compare them against your current line and see the difference.
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.
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SPS-278
SPS-278
Item #N/A
View ProductSingle Spring Mechanical Seal SPS-278 | PS-278 cup Equivalent
Equal to: industry standard number 278 / PS-278 cup
Typical applications: Centrifugal pumps, mixers, and other rotating equipment.
Key specs: Shaft size: 2-3/8″ single spring seal • Seat: 3.250″ x .562″ cup • Rotary OD: 3.083″ • Working length: 2.500″
Design & construction:
Rotary head Type E/1. Electro-polished 316 stainless steel metal parts. Elastomeric bellows. Non-directional (independent of shaft rotation).Materials available (choose from dropdown)
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CAR/CER/NIT — Carbon vs. Ceramic faces, Nitrile elastomers
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CAR/CER/VIT — Carbon vs. Ceramic faces, Viton/FKM elastomers
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SIC/SIC/VIT — Silicon Carbide vs. Silicon Carbide faces, Viton/FKM elastomers
Please click “specifications” below for OEM numbers and Pump Nameplate Data
SPS Line
Same Fit. Lasting Reliability.
Our SPS single-spring seals are like-for-like replacements for industry-standard E/1, D/2, and C/21 heads—delivering the same fit and function with upgraded materials designed for extended service life.
What sets SPS apart:
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Heavier elastomer bellows for improved structural integrity and stability under pressure
-
Resin-impregnated, abrasion-resistant carbon faces — double-density carbon designed for enhanced hardness and durability
-
316/304 stainless steel components for superior corrosion protection across E/1, D/2, and C/21 head styles
-
Precision-finished rotary heads with a brushed appearance for a high-quality machined look and consistent sealing performance
-
Built to exacting standards for dependable performance across a wide range of pump applications
Engineered to rigorous standards, SPS seals provide a durable, dependable alternative to common aftermarket or OEM options—compare them against your current line and see the difference.
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.
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SPS-279
SPS-279
Item #N/A
View ProductSingle Spring Mechanical Seal SPS-279 | PS-279 cup Equivalent
Equal to: industry standard number 279 / PS-279 cup
Typical applications: Centrifugal pumps, mixers, and other rotating equipment.
Key specs: Shaft size: 2-1/2″ single spring seal • Seat: 3.375″ x .562″ cup • Rotary OD: 3.210″ • Working length: 2.500″
Design & construction:
Rotary head Type E/1. Electro-polished 316 stainless steel metal parts. Elastomeric bellows. Non-directional (independent of shaft rotation).Materials available (choose from dropdown)
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CAR/CER/NIT — Carbon vs. Ceramic faces, Nitrile elastomers
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CAR/CER/VIT — Carbon vs. Ceramic faces, Viton/FKM elastomers
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SIC/SIC/VIT — Silicon Carbide vs. Silicon Carbide faces, Viton/FKM elastomers
Please click “specifications” below for OEM numbers and Pump Nameplate Data
SPS Line
Same Fit. Lasting Reliability.
Our SPS single-spring seals are like-for-like replacements for industry-standard E/1, D/2, and C/21 heads—delivering the same fit and function with upgraded materials designed for extended service life.
What sets SPS apart:
-
Heavier elastomer bellows for improved structural integrity and stability under pressure
-
Resin-impregnated, abrasion-resistant carbon faces — double-density carbon designed for enhanced hardness and durability
-
316/304 stainless steel components for superior corrosion protection across E/1, D/2, and C/21 head styles
-
Precision-finished rotary heads with a brushed appearance for a high-quality machined look and consistent sealing performance
-
Built to exacting standards for dependable performance across a wide range of pump applications
Engineered to rigorous standards, SPS seals provide a durable, dependable alternative to common aftermarket or OEM options—compare them against your current line and see the difference.
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.
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