516
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DESCRIPTION
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):
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T-16 footprint for quick, drop-in replacement
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Machined carbon face for smoother sealing vs. molded carbon
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Reliable materials for standard pool/spa chemistry
Upgrades / Variations (same footprint)
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200 — Basic (Buna)
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3867 — Premium + Viton
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200cv — Molded carbon
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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
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SPECIFICATIONS
OEM numbers: S20788, S20789, S20994 , DP0304 , W105-7A , 74297284 , SP1250XZ2C , 2120-0008 , 48273 , 14010242 , 0118, 101.000.110C , 118.000.102, 118.000.110 , S20788 , 70X102-M
Brands: BELL & GOSSETT (A XYLEM Brand) , BERKELEY PUMPS (A PENTAIR Brand) , CH&E MFG. COMPANY , FLOWSERVE CORPORATION , HAYWARD INDUSTRIES, INC. , HYPRO CORPORATION , MAGNUM PRODUCTS, LLC. , PACO , PRICE PUMP COMPANY , SCOT PUMP (A WILO USA Brand) , STA-RITE INDUSTRIES , TEEL PUMP , WEBER INDUSTRIES, INC.
Nameplate Data: 1P746-851-860-896-897-952-955-996, 1P998, 2P004-006-390, 2P091, 2P092 3P551-3P553, 3P577
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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/machined carbon face (never plastic) with upgrade options — 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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