100c Mechanical Seal (PS-100) — 5/8″ | Sta-Rite & Pentair Dura-Glas, Max-E-Glas Pool Pumps

ps-100 , ps-200 , ps-201 mechanical seal

100c Mechanical Seal (PS-100) — 5/8″ | Sta-Rite & Pentair Dura-Glas, Max-E-Glas Pool Pumps

Weight	.25 lbs
Dimensions	.75 × .75 × 1.25 in

Title	Quantity	Price Per Unit
Pool Pumps	1 - 24	0% $3.60
Pool Pumps	25 - 49	6% $3.38
Pool Pumps	50 - 99	12% $3.17
Pool Pumps	100 - 499	18% $2.95
Pool Pumps	500 +	24% $2.74

QTY	Price
100c Mechanical Seal (PS-100) — 5/8" \| Sta-Rite & Pentair Dura-Glas, Max-E-Glas Pool Pumps quantity	$3.60

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DESCRIPTION

Mechanical Seal 100c — Type 166 (5/8″)| PS-100 Equivalent

Equivalent to industry standard 100 / PS-100.
Direct-fit Type 166 mechanical seal for Sta-Rite/Pentair J Series pumps. Built with molded carbon / ceramic faces and Buna-N elastomers for reliable, everyday pool/spa service.

At-a-glance: 5/8″ shaft • 1.187″ × 0.343″ cup seat • Molded carbon/ceramic, Buna-N (Type 6W)

Fitment: J Series Shaft Seal — 5/8″ (Buna-N Type 6W replacement for Sta-Rite/Pentair J Series)

Cross-references (identical to)
U10993SS, 173510102, AS100, Anthony 04547, East Side P28322, Purex P28280, 071733, Sta-Rite U109-6A, U109093, U10993SS, 173510102, Sears 42G2377W, Swimquip P61

Technical Specifications:

Product Category: Parts

Poolweb Item #: U109-6B

Cross Reference #: APCAS100, U109-6A

Same seal, same size, same fit — what changes is the material and how it’s built. All five seals below are the PS-100 for a 5/8″ shaft, and all five fit the same pumps. They differ in two ways. The build: a molded carbon face or a premium carbon face machined from solid stock. The materials: a ceramic or silicon carbide seat, and Nitrile or Viton rubber. Pick the one that suits your water.

Seal	Material	Best For This Water
100c — this seal	Molded carbon face, ceramic seat, Nitrile rubber	Normal chlorine, normal temperature, clear water. The standard build for a home pool or spa.
100cv	Molded carbon face, ceramic seat, Viton rubber	Saltwater or higher chlorine, and warmer water. Viton holds up where standard Nitrile hardens and cracks.
957	Machined premium carbon face, ceramic seat, Nitrile rubber	Saltwater pools with a chlorine generator, commercial pools, or any pump that runs most of the day.
3866	Machined premium carbon face, ceramic seat, Viton rubber	High chlorine and hot water — heated spas, therapy pools, heavy commercial duty.
100cvss	Silicon carbide face and seat, Viton rubber	Sandy, dusty or gritty water, or any pump where seals keep failing early. The hardest faces we offer.

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 more OEM numbers and Pump Nameplate Data

SPECIFICATIONS
OEM numbers: 4547 , 712-7042-750 , 1S-5010 , P-28322 , 42G2377W , 0625-6BC , U9-469 , P28280 , C76-78A, C76-98A , 142-54049, 51294 ,C176-037 , U109-6, U109-6A , U109-93SS, 17351-0102S , 17-30009-005 , 330.009.005 , 1760371

Brands: ACE PUMP CORPORATION, AERMOTOR PUMPS (A PENTAIR Brand) , ANTHONY & SYLVAN CORPORATION , AURORA PUMPS (A PENTAIR Brand) , CARTER PUMPS, INC. , CHICAGO PUMP (Division of GRUNDFOS, INC.) , DETROIT HARVESTER COMPANY , EAST SIDE MFG. , ECONOMY PUMP , HOMART-SEARS , MEMPHIS PUMP & MFG. COMPANY, INC. ,NASH (Division of GARDNER DENVER) , PEERLESS PUMP COMPANY , PENTAIR WATER FILTRATION , PUREX HYDROTECH , RED JACKET , SKIDMORE PUMP , STA-RITE INDUSTRIES , TEEL PUMP , WEIL PUMP COMPANY, INC. (Part of WILO USA) , XYLEM INC. , PENTAIR POOL PRODUCTS

Nameplate Data: ACH-25, 33, 50, 75, 100; ACL-75 , ACO & BCH-25, 33, 50, 75 ; L Series™ SW-DW Jet Pump ; AJ Series, Dura-Glas® Pre 1998, U9-469 ; Dyna-Glas® and Dyna-Max® ; Max-E-Glass™ pre 1998 ; PLBC Series Pre 1995 ; PLBC Series 2P141, 2P894-2P899, 3P683-684-685, 3P-686-687-690-692-715-716, 1R311, 5P403, 5P404, ; IR303, 5P407

Cross references & alternative part numbers

This seal is commonly searched and referenced as:
- PS-100 mechanical seal
- 100 mechanical seal
- 100c mechanical seal
- Type 166 mechanical seal
- J Series pump shaft seal 5/8
- Sta-Rite / Pentair J Series mechanical seal
- U109-6A / U109093 / U10993SS
- Poolweb Item: U109-6B
- Cross Reference: APCAS100
Cross-references (different format):
U10993SS, 173510102, AS100, Anthony 04547, East Side P28322, Purex P28280, 071733, Sta-Rite U109-6A, U109093, Sears 42G2377W, Swimquip P61
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:
- Crimped rotary face with positive drive — securely held in place to prevent dislodgement during installation.
- Full metal retainer with positive drive — ensures strength and long-term durability.
- Full rubber bellows construction — provides complete sealing along both the shaft and face, rather than relying on a small O-ring or partial gasket.
- 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.

Disclaimer: Seal House USA provides aftermarket replacement parts. Any OEM names are used strictly for cross-reference. We are an independent supplier.