Mechanical Seal 3867 (PS-3867) — 5/8″
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DESCRIPTION
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 (FKM) 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):
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Viton handles higher chlorine, heat, and chemicals better than Buna
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Machined carbon face for smoother sealing vs. molded carbon
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T-16 footprint for fast, drop-in replacement
Upgrades / Alternatives (same footprint)
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200 — Basic (Buna)
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516 — Premium carbon face (Buna)
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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
Cross references & alternative part numbers
OEM numbers: SPX2700XAV , A-8 , Series 1800 , 35B1175, 35B1178 , 306-1007 , 92500151 , 92500150 , 92500150 , 92500151 , 92500150 , SPX1250XZ2 , SPX2700SA , SPX1250XZ2 , SPX2700SA , SPX2700SAV ,10-0002-06 , 353253S , 354545 , 354545S , 354545 , 2920060603, 60603-200 , 2921606204 , 354545S , 17304-0100S , 6500-447 , 319-3010/B, 319-3090/B
Brands: Hayward industries inc., Arneson Products , Astral Pool , Baker-Hydro , Doughboy Industries , Gecko Alliance, Inc. , Jacuzzi® , Pentair Pool Products , Speck Pumps , Sta-Rite Industries , Sundance® Spas , Waterway Plastics ,
Nameplate Data: Pool Sweep , Sena , Circ-Master® Circ-Master® CP, HP, XP Dominator High Head/Med Head , Flo-Master® Flo-Master® CP,HP Flo-Master® XP2, XP2E Flo-Master® XP3 Pond-Flo , FMCP, FMHP, FMVP Booster Pump 5060 Booster Pump 6060 Cast Iron , MaxFlo II™, MaxFlo VS™ 500 Omni , A, J, JCM Series , Cygnet , K, KM Series L3 & L25 LCM, LCU Series, Vector LH,LPC,LPH,LR Splash Pak K Vector (LVL) Challenger® , Challenger® Centrifugal , Dynatron® , Dynamo® Aboveground , Optiflo® Aboveground , Pinnacle®, Superflo® , Waterfall Specialty Pump , A91, A91-11VSP, BADU® Pro Series ES90, ES90-II , Dura-Glas® – PE, PEA,P2R, P2RA , Max-E-Glas™ PE, PEA,P2R,P2RA , CSA Supreme, E Series Center Discharge EX2, HI FLO 2 Iron Might (2013-Present) Spa Flo, Spa Flo
Also known as / searched as
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PS-3867 mechanical seal
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3867 mechanical seal
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PS3867 seal / PS 3867 seal
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Type 166 mechanical seal 5/8
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T-16 mechanical seal
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pool pump mechanical seal 5/8
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spa pump mechanical seal 5/8
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machined carbon ceramic pump seal FKM
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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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