Seal Specialists Available — Call or Text Anytime for Technical Support or Part Matching 561-414-1046

ENGINEERED TO FIT. BUILT TO LAST.

my cart
0 items

No products in the cart.

checkout
561.414.1046

680c / 4240c Mechanical Seal (PS-680 / PS-4240) – 5/8″

buy ps-680c ps-4240 seal

680c / 4240c Mechanical Seal (PS-680 / PS-4240) – 5/8″

SKU: N/A

Weight 1 lbs
Dimensions 8 × 6 × 4 in
QTY Price
Have a Question?
  • DESCRIPTION

    Mechanical Seal 680C / 4240C — Type 166 (5/8″)

    680c / 4240c single spring mechanical seal, PS-680 / PS-4240 equivalent. Fits 5/8″ shaft with 1.187″×0.288″/0.296″ cup seat and Type 166 footprint (Type 16 / G / A / 6 / AV / 2100 replacement styles).

    Drop-in equivalent for common Type 16, G, A, 6, AV, 2100 styles.
    Built for pool/spa and small-pump service with a precision finish and OEM-friendly dimensions.

    At-a-glance specs: 5/8″ shaft • 1.187″ × 0.288″ / 0.296″ cup seat (verify seat thickness) • Type 166 footprint

    Why choose 680C / 4240C:

    • Premium carbon face (not molded): Our Carbon/Ceramic builds use precision-machined, resin-impregnated carbon—not plastic/phenolic like PS-702 and similar equals—for smoother sealing and longer life.

    • Direct-fit crossovers: Replaces PS-702, PS-4240, PS-4462, PS-518, PS-701, PS-4284.

    Material options (select from dropdown)

    • CAR/CER/NIT — Standard build with machined carbon vs. ceramic, Nitrile elastomers.

    • CAR/CER/VIT — Same machined carbon/ceramic with Viton for higher chlorine, temperature, and chemicals.

    • SIC/SIC/VIT — Silicon Carbide vs. Silicon Carbide with Viton for maximum wear and heat resistance.

    • CAR/SIC/VIT — Direct replacement choice for PS-4284.

    Have questions? Check out our Single Spring Seal 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.

    Looking for more? Shop Pump Repair Kits, Parts & Accessories, and Pre-Cut Gaskets.

    Please click “specifications” below for OEM numbers and Pump Nameplate Data
  • SPECIFICATIONS

    OEM numbers:

    680: 19023

    4240: 10K10, 10K121

    4462: 10K2

    701: 725983062 , C76-134 , 42-607

    702: 704705062, 725981062 , 15110 ,

    518: 076-183

    Brands:

    680: METAL MASTER, WATTS WATER TECHNOLOGIES

    4240: GOULDS PUMPS

    4462: GOULDS PUMPS

    701: GOULDS PUMPS , RED JACKET , VIC CLEANING MACHINE , WHITE

    702: GOULDS PUMPS , METAL MASTER . WHEELER, C.H. ,

    518: RED JACKET

    Nameplate Data:

    680: 19023

    4240: 10K10, 10K121

    701: [[Balanced Flow BF-Figs.3628,3638,3642,3648,37283738,3742,3748,3788,3811]

    702: [Goulds pumps: Balanced Flow BF-03 Series G, LD, LS, M,O, XS0515, 20, 30, 50Jetomatic Fig. 3642,3672,3742 10K1,10K6,20831100] [Wheeler: Reuse Seat Housing]

    Part number variations
    PS-680 / PS680 / PS 680
    PS-4240 / PS4240 / PS 4240
    680c / 680 C / 680-c
    4240c / 4240 C / 4240-c
    PS-702 / PS702
    PS-701 / PS701
    PS-4462 / PS4462
    PS-518 / PS518
    PS-4284 / PS4284

    Size / measurement variations
    5/8″ mechanical seal / 0.625″ seal / 5 8 seal
    1.187″ seat / 1.187 seat OD
    1.187 × 0.288 seat
    1.187 × 0.296 seat
    “verify seat thickness”

    Style variations
    Type 166 seal / Type 166 pool pump seal
    Type 16 seal / T-16 seal
    G type / A type / Type 6 / AV seal
    2100 style small seal

  • 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.

Related products