G-Type / 2100
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3015 Mechanical Seal (PS-3015)— 1-3/8″
3015 Mechanical Seal (PS-3015)— 1-3/8″
Single Spring Mechanical Seal 3015 | PS-3015 Equivalent (G-Type / 2100)
Direct-fit aftermarket 3015 / PS-3015 mechanical pump seal built in the G-Type / John Crane 2100 style—a compact, unitized, single-spring elastomer bellows seal design widely used across pump applications. Ideal for repairs where you need OEM-style fit and reliable sealing performance.
Key specs: • Shaft size: 1-3/8″ (1.375″) single spring seal • Seat: 2.000″ x 0.437″ • Rotary OD: 1.929″ • Working length: 1.024″
Material build: VIT / SIC / SIC — Viton elastomers; Silicon Carbide vs. Silicon Carbide faces
Excellent chemical/temperature resistance and wear durability.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.
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3020 Mechanical Seal (PS-3020)— 2-1/8″
3020 Mechanical Seal (PS-3020)— 2-1/8″
Single Spring Mechanical Seal 3020 | PS-3020 Equivalent (G-Type / 2100)
Direct-fit aftermarket 3020 / PS-3020 mechanical pump seal built in the G-Type / John Crane 2100 style for reliable, leak-tight performance. This is a common single-spring seal used across industrial and HVAC/hydronic pump applications—match dimensions and OEM references before ordering.
Key specs: • Shaft size: 2-1/8″ (2.125″) single spring seal • Seat: 3.000″ x 0.562″ • Rotary OD: 2.717″ • Working length: 1.181″
Material build (standard)
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VIT / SIC / SIC — Viton elastomers; Silicon Carbide vs. Silicon Carbide faces
Excellent chemical/temperature resistance and wear durability.
Fitment
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O-ring seat design
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Listed as compatible with VSC-style pump 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.
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3021 / 3802 Mechanical Seal (PS-3021 ; PS-3802)— 3″
3021 / 3802 Mechanical Seal (PS-3021 ; PS-3802)— 3″
Single Spring Mechanical Seal 3021 / 3802 | PS-3021 PS-3802 Equivalent
Direct-fit aftermarket replacement G-Type mechanical seal equal to industry standard 3021 / 3802 and PS-3021 / PS-3802. Built to the John Crane 2100-style design for reliable, leak-tight performance in demanding pump service.
Key specs: • Shaft size: 3.000″ single spring seal • Seat: 3.875″ × 0.625″ • Rotary OD: 3.898″ • Working length: 2.062″
Material build
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VIT / SIC / SIC — Viton elastomers; Silicon Carbide vs. Silicon Carbide faces
Excellent chemical/temperature resistance and wear durability.
Cross-references
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3021 / 3802, PS-3021 / PS-3802
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Industry standard G-Type / John Crane 2100
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

3022-SC SEAT Mechanical Seal (PS-3022-SC Seat)— 2-3/8″
3022-SC SEAT Mechanical Seal (PS-3022-SC Seat)— 2-3/8″
Single Spring Mechanical Seal 3022 | PS-3022 Equivalent (G-Type / 2100)
Direct-fit aftermarket G-Type mechanical seal equal to industry standard 3022 / PS-3022. Designed in the John Crane 2100-style configuration for reliable, leak-tight performance in common pump services.
Key specs: • Shaft size: 2-3/8″ (2.375″) single spring seal • Seat: 3.250″ x 0.562″ • Rotary OD: 3.150 • Working length: 1.299″
OEM reference
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OEM number: 81974941
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Brand: Flowserve Corporation
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Nameplate data: VCS Mechanical Seal
Explore our full lineup of Single Spring Seals—PS replacements, pool/spa seals, and our SPS line.
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Please click “specifications” below for OEM numbers and Pump Nameplate Data

3170 Mechanical Seal (PS-3170)— 2″
3170 Mechanical Seal (PS-3170)— 2″
Single Spring Mechanical Seal 3170 | PS-3170 Equivalent (G-Type / 2100)
Direct-fit aftermarket replacement mechanical seal 3170 / PS-3170 built in the G-Type / John Crane 2100 & 2106 style for reliable, leak-tight performance. This seal is a common solution for 2.000″ shaft pump repairs where a floating mating ring (Type G) configuration is required.
Key specs: • Shaft size: 2.000″ single spring seal • Seat: 2.750″ x 0.500″ • Rotary OD: 2.598″ • Working length: 1.500″
Material build (standard):
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VIT / SIC / SIC — Viton (FKM) elastomers; Silicon Carbide vs. Silicon Carbide faces
Excellent chemical/temperature resistance and wear durability.
Key Features:
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Upgraded design: Replaces the original carbon rotary face with a silicon carbide rotary face for enhanced durability and abrasion resistance.
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Includes Viton #129 O-ring for sleeve
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Seal type: T-25 L-shape floating seal
Cross Reference:
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OEM Number: P5001890
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Brand: Bell & Gossett (a Xylem brand)
Explore our full lineup of Single Spring Seals—PS replacements, pool/spa seals, and our SPS line.
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Please click “specifications” below for OEM numbers and Pump Nameplate Data

360c Mechanical Seal (PS-360) — 1″Pentair EQ & Purex C Series Commercial Pool Pumps
360c Mechanical Seal (PS-360) — 1″Pentair EQ & Purex C Series Commercial Pool Pumps
Item #SH-360
A 1″ single-spring mechanical seal built to the PS-360 footprint, with the same 1.625″ seat and the same BCFJF configuration as the original. It drops into a Pentair EQ or Purex C Series commercial bronze pump using the factory 071725S service position — no shimming and no machining.
The carbon face is machined from solid stock rather than molded, which is the one place this seal is built above the standard PS-360 it replaces. A machined face runs flatter out of the box and holds that flatness longer against the ceramic, which is what keeps a commercial pump from weeping at the shaft after a season of run hours.
Fits: Pentair EQ Series and Purex® C Series commercial bronze pool pumps, all models (071725S), plus Berkeley (S-08742, S-09583), Ace Pump BCH-300, BCH-500, BCH-750 and BCH-1000 and models 100S, 133S, 150S and 175S, Carter (2S-5050, 2S-5089), A-C Pump / ITT (52-104-969-806) and Centrex (201-491, 201-493). Any 1″ shaft pump built to the US Seal PS-360 / Type 16 footprint.
Shaft size 1.000″ Seat / mating ring OD 1.625″ Seal type T-16 (Type 16) single spring, head figure A, seat figure 1 Material code BCFJF (Nitrile) · VCFJF (Viton) Faces Machined carbon vs. ceramic, or silicon carbide vs. silicon carbide Elastomer Nitrile (Buna) or Viton (FKM) Cross-references US Seal PS-360, PS-360V, PS-3874, PS-1909 OEM numbers Pentair 071725S · Berkeley S-08742, S-09583 · Ace Pump 42120F, GE-7-V · Carter 2S-5050, 2S-5089 · A-C Pump / ITT 52-104-969-806 · Centrex 201-491, 201-493 · AG Chemical GL-7V Brands Pentair, Purex, Berkeley, Ace Pump, Carter, A-C Pump (ITT), Centrex Nameplate data / pump models EQ Series, Purex C Series (commercial bronze, all models), Ace BCH-300 / BCH-500 / BCH-750 / BCH-1000, Ace 100S / 133S / 150S / 175S Which one do I need?
Option Faces & Rubber US Seal Equal Best For This Water 360c Machined carbon / ceramic / Nitrile PS-360 Standard chlorinated pool and fresh water The direct PS-360 replacement.
360CV Machined carbon / ceramic / Viton PS-3874 Salt, ozone, UV, high chlorine, hot water This is the build US Seal sell as the PS-3874.
360CVSS Silicon carbide / silicon carbide / Viton PS-1909 Grit, sand, ag chemical, abrasive service 60CVSS, silicon carbide against silicon carbide with Viton. Hard faces on both sides survive sand and dry-run contact that would groove a carbon face. Equal to PS-1909.

3793 Mechanical Seal (PS-3793)— 3-1/2″
3793 Mechanical Seal (PS-3793)— 3-1/2″
Direct-fit aftermarket replacement G-Type mechanical seal equal to industry standard 3793 / PS-3793, built in the John Crane 2100/2106 style for dependable, leak-tight performance. This seal is commonly used in larger pump applications where a 3-1/2″ shaft single spring unitized seal is required.
Key specs: • Shaft size: 3-1/2″ (3.500″) single spring seal • Seat: 4.375″ x 0.625″ • Rotary OD: 4.402″ • Working length: 2.189″
Materials & design notes:
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Material build: Carbon / Silicon Carbide / EPDM
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Design note: Center-mount O-ring seat (no notch)
OEM reference:
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OEM number: P5001895
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Brand: Bell & Gossett (A Xylem Brand)
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Common nameplate data: VSX / VSC including 14×16×17 and 12×14×17.5B configurations
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

3804 Mechanical Seal (PS-3804 / VG-3804)2-1/2″
3804 Mechanical Seal (PS-3804 / VG-3804)2-1/2″
Single Spring Mechanical Seal 3804 | VG-3804
Direct-fit aftermarket G-Type replacement mechanical seal equal to industry standard 3804 / PS-3804, designed in the John Crane 2100 style for dependable, leak-tight pump performance.
Key specs: • Shaft size: 2-1/2″ (2.500″) single spring seal • Seat: 3.375″ x 0.562″ • Rotary OD: 3.268″ • Working length: 1.811″
Material build: Carbon/Silicon Carbide/EPDM
OEM reference (helps match manuals/invoices)
This seal is commonly cross-referenced to:
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OEM number: P5001891
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Brand: Bell & Gossett (A Xylem Brand)
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Nameplate data: VSX Series – Standard Construction
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PS-3804 /VG-3804
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

3883 Mechanical Seal (PS-3883)— 1-1/4″
3883 Mechanical Seal (PS-3883)— 1-1/4″
Single Spring Mechanical Seal 3883 | PS-3883
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
Rebuilding a Sta-Rite D-series pump? The shaft sleeve, diffuser ring and housing gasket all come out with the seal — and a new seal running on a worn sleeve will not last.
All four parts in one part number:
Sta-Rite D-Series Pump Repair Kit — this PS-3883 seal, C23-58 shaft sleeve, C21-2 diffuser ring and C20-46 gasket
Not taking the kit? Check the sleeve before you fit a new seal — a scored sleeve will chew through it:
Sta-Rite C23-58 Shaft Sleeve (2358) — stainless steel, 1.000?”ID × 1.250″ OD, with O-ring
- Also in this rebuild — C21-2 Diffuser Ring
- C20-46 Housing Gasket (C2046)
Not sure what your rebuild needs? Call or text 561-414-1046 — no purchase required.
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