201c
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DESCRIPTION
Mechanical Seal 201c — Type 166 (3/4″) | PS-201 Equivalent
Equal to industry standard 201. Direct-fit replacement for PS-201 single-spring seals in pool/spa and small-pump applications.
At-a-glance specs: 3/4″ shaft • 1.375″ × 0.406″ cup seat • Type 166 • Molded carbon/ceramic faces • Buna-N elastomers
Why choose 201 (PS-201)
Reliable everyday build for clean-water, standard-chemistry systems with quick, drop-in fit.Upgrades / Variations (same footprint)
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851 — Premium carbon face
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3868 — Premium + Viton
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201CV — Molded carbon
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201CVSS — Silicon Carbide / Silicon Carbide / Viton®
Have questions? Check out our Pool/Spa Small Pump 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.
Please click “specifications” below for OEM numbers and Pump Nameplate Data
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SPECIFICATIONS
OEM numbers: SJ-47 , MS-756B , 395005 , 5MCD5 , S05646 , S20791 , S20792 , S21962 , 17039 , 1S-5039 , 1661 , 47406 , 60985AA , 6513207 , 126544 , 126545 , 10150209 , 292-5040-00-3 , SPX1600Z2 , SPX1600Z2G , A-75911 , 10-120, 10-477 , 10-486 , 10-1390-04 , 10-1502-09 , 1661 , 72344 , 38592000000 , 6070-0 , 240170 , MS17 , 354001 , K101-1 , 91909719 , 13110 , 14017122 , 31- 812 , 071728 , 76-129, 76-189 , X7718 , 12-023 , 601 , 601A , 101.000.102 , U109-358SS , U109-372SS , 17351-0101 , 37407-0009 , 25062 , 5P411 , 5P412 , 1R313 , P-11201 , 152243-B , 15693, 56105
Brands: AERMOTOR PUMPS (A PENTAIR Brand) , AMERICAN PRODUCTS , A.Y. McDONALD MFG. COMPANY , BERKELEY PUMPS (A PENTAIR Brand) , BRADEN WINCH (A PACCAR COMPANY) , BURKS® PUMPS , CARTER PUMPS, INC. , CARVER PUMP COMPANY , C-B TOOL COMPANY , CRANE-DEMING (Division of CRANE PUMPS & SYSTEMS) , DOMESTIC PUMP , DOUGLAS MOTOR CORPORATION , EAST SIDE MFG. , ENPO PUMP COMPANY , EUROPLAST LTD. FAIRBANKS NIJHUIS , FLINT & WALLING (Division of ZOELLER PUMP COMPANY) , FRANKLIN ELECTRIC COMPANY, INC. , GECKO ALLIANCE,INC. , HALE PRODUCTS, INC. , HAYWARD INDUSTRIES, INC. , HOMELITE CORPORATION , JACUZZI , JAEGER , LANCASTER PUMP COMPANY , LUITWEILER CORPORATION , MARLOW (Division of ITT INDUSTRIES) , MEMPHIS PUMP & MFG. COMPANY, INC. , MIDLAND PRODUCTS (Division of CRANE PUMPS & SYSTEMS) , MONARCH PUMPS (Division of FRANKLIN ELECTRIC COMPANY, INC.) , PAC-FAB (PENTAIR POOL PRODUCTS, INC.) , PACO , PEABODY BARNES MFG. (Division of CRANE PUMPS & SYSTEMS) , PREMIER , PRICE PUMP COMPANY , PUREX HYDROTECH , RED JACKET , REXNORD INDUSTRIES, LLC. , RICE PUMP , RUTH BERRY PUMP COMPANY , SCOT PUMP (A WILO USA Brand) , STA-RITE INDUSTRIES , STERLING MACHINERY , SWIMQUIP , TAIT MFG. ,TEEL PUMP , TRUPAR, WAUKESHA ENGINE , WAYNE COMBUSTION SYSTEMS , WORTHINGTON
Nameplate Data: Americana® , Bronze-Noryl® ; New Style: C1-1/2TPLS , C2TPMS , C2-1/2TPMS , B1-1/2MQKS C2TPMS , C2.5TPMS , B1XQHS , B1-1/4MQS , B1-1/2MQS ; Model 1003 ; Fig. 4910, 4911, 3305, 3352, 4352 ; AC, AEC, AES, AS , 81, 82, 83, 605, 607, 609 ; Shallow Well 64, 65, 66, 67, 68 ; Deep Well ; Max-Flo®, Super Pump®, Super Pump II® ; 5RP, SF, Magnum, RC-Series ; Types S & SD Lancaster Dutchman 1182, 1183, 1192, 1193 ; GSX ; Argonaut®, Mardur® , Hydropump® ; Vertical Single and Multi Stage 152 152DM, 202D, 202DM, 302D 302DM and 502DM ; Series 120T, MKII 225/255, 300 325/355, 725/756 ; AH Series™, L Series™ ; DJ/JS/JT Series Pre 01/01 ; Dura-Glas II® Pre 1998, Dura-Jet Dyna-Glas / Dyna-Max, Dyna-Jet™ ; JW/JWPA Series Max-E-Glas™ II, Pre 1998 , XL VI/XL VII Series , 1.5PE, 3 & 4
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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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