3890c
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DESCRIPTION
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 / CeramicWhy choose 3890:
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T-16 footprint for quick, direct replacement
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General-duty build for clean water and standard chemistry
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Proven performance in pool/spa and small circulation pumps
Upgrade / Variation
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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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SPECIFICATIONS
OEM numbers: SPX3200SA, SPX4000 , P84-3
Brands: HAYWARD INDUSTRIES, INC. , JANDY® (A FLUIDRA Brand)
Nameplate: EcoStar®, NorthStar, Tri-Star , PB4-60Q
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PHYSICAL PROPERTIES
Seal House Type 166
Our Type 166 configuration combines the best design elements we’ve refined over the years to deliver superior reliability and performance.Key advantages include:
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Crimped rotary face with positive drive — securely held in place to prevent dislodgement during installation.
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Full metal retainer with positive drive — ensures strength and long-term durability.
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Full rubber bellows construction — provides complete sealing along both the shaft and face, rather than relying on a small O-ring or partial gasket.
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Molded carbon face (never plastic) — delivers extended service life.
Compatibility & upgrade:
The Type 166 is designed to replace most small seal types commonly used in pool and spa applications, including Type 16, G, A, 6, AV, 2100, and more. Even in its basic form, this seal is a significant upgrade over standard “pool” seals typically available on the market.
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