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    Kohler K-3978 Replacement Parts

    There are 18 repair parts listed below for:

    • Manufacturer/Brand: Kohler
    • Model #: Kohler K-3978
    • Description: 1.6 GPF Two-Piece Elongated Toilet with 12" Rough In from the Wellworth Collection

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    • 1. Confirm you have chosen the correct model number.
    • 2. Browse the available parts below.
    • 3. Choose quantity, finish if needed and add to cart.
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    Need to fix your Kohler K-3978? At Build.com, all of our replacement parts list below are 100% genuine Kohler products. Use these parts to repair your fixture and restore it to its original condition. Use our repair parts diagrams to find the exact part for your K-3978. We help make repairing your fixture easy when you shop with us.

    The Kohler K-3978 has 18 repair items that are compatable with the following Kohler SKUs: K-3978-47, K-3978-96, K-3978-7, K-3978-NY, K-3978-95, K-3978-G9, K-3978-0 .

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    Order K-3978 Replacement Parts

    Qty Product Description Parts Diagram Part Reference #
    Kohler 1013092 Part

    Kohler 1013092**

    Product Features:

    • Bolt cap accessory pack only
    • Part numbers (1013092-0) and (1013092-96) have been replaced by (GP1013092)


    View Diagram Page: 1 1013092**
    Kohler 1057941 Part

    Kohler 1057941

    Locknut Assembly, Shank, Two-Piece (Replaces the 84678).

    Finish: N/A

    Price: $1.00

    View Diagram Page: 1 1057941
    Kohler 1138565 Part

    Kohler 1138565**

    Replacement Cover, Tank, Toilet

    Finish: Dune

    Price: $26.20

    View Diagram Page: 1 1138565**
    Kohler 1145365 Part

    Kohler 1145365

    Replacement Flush Valve Kit, 1.6 GPF

    Finish: N/A

    Price: $14.80

    View Diagram Page: 1 1145365
    Kohler 32572 Part

    Kohler 32572 WASHER- .330 ID X 7/8 OD

    Finish: N/A

    Price: $1.00

    View Diagram Page: 1 32572
    Kohler 42397 Part

    Kohler 42397 SUPPLY NUT

    Finish: N/A

    Price: $1.50

    View Diagram Page: 1 42397
    Kohler 42398 Part

    Kohler 42398


    Finish: N/A

    Price: $1.00

    View Diagram Page: 1 42398
    Kohler 50752 Part

    Kohler 50752 WASHER

    Finish: N/A

    Price: $1.00

    View Diagram Page: 1 50752
    Kohler 51533 Part

    Kohler 51533 NUT- .312-18UNC-2B

    Finish: N/A

    Price: $1.00

    View Diagram Page: 1 51533
    Kohler 51624 Part

    Kohler 51624 CLOSET TANK BOLT

    Finish: N/A

    Price: $2.10

    View Diagram Page: 1 51624
    Kohler 78132 Part

    Kohler 78132


    Finish: N/A

    Price: $1.00

    View Diagram Page: 1 78132
    Kohler 83143 Part

    Kohler 83143

    Seal Diaphragm

    Finish: N/A

    Price: $3.90

    View Diagram Page: 1 83143
    Kohler 85307 Part

    Kohler 85307 WASHER- SHANK

    Finish: N/A

    Price: $1.00

    View Diagram Page: 1 85307
    Kohler GP1059291 Part

    Kohler GP1059291

    Seal Kit

    Finish: N/A

    Price: $6.90

    View Diagram Page: 1 GP1059291
    Kohler GP1083167 Part

    Kohler GP1083167

    Product Features:

    • Adjustalbe fill valve kit only
    • This part number (GP1083167) replaces part number (1085759)

    Finish: N/A

    Price: $14.99

    View Diagram Page: 1 GP1083167
    Kohler K-4198 Part

    Kohler K-4198

    Product Features:

    • Elongated bowl gives a modern and comfortable look and feel extending out an extra 1-1/2" compared to a round configuration
    • Covered under Kohler's 1-year limited warranty
    • Made from porcelain for that clean and classic look
    • Floor mounted installation for the standard, contemporary bathroom
    • Seat is not included - must be purchased separately

    Product Specifications:

    • Overall Height: 14-1/2" (measured from the bottom of the base to the highest point on bowl)
    • Overall Length: 28-3/4" (measured from the back of the bowl to the front of the rim)
    • Overall Width: 15-1/2" (measured from the furthest point on the left to the furthest on the right)
    • Water Area: 11-1/4" x 8-1/4" (inner rim dimensions length X width)
    • Trapway (Discharged Passageway) Size:  2-1/8"
    • Distance Between Toilet Seat Installation Holes: 5-1/2"

    About Kohler:

    Gracious living is characterized by qualities of charm, good taste, generosity of spirit and the enhancement of nature. It is Kohler’s mission that you can improve your sense of gracious living with every experience you have with a Kohler product or service.

    With everything that Kohler does it lives on the leading edge of design and technology, while maintaining a constant level of quality regardless of price. Kohler sets the standard of excellence in its field, and yet is constantly striving to improve.

    From sustainable products in the kitchen and bath, to engines for lawn tractors and generators, to power systems that protect data centers and urban landscapes all over the world; this is what the Kohler Company is all about.


    View Diagram Page: 1 K-4198
    Kohler K-4468 Part

    Kohler K-4468

    1.6 GPF Tank from the Wellworth Collection

    Exceptional Performance. Exceptional Value. Wellworth toilets have been an American benchmark for innovation and performance since 1936. With a new design in 2011, the Wellworth toilet brings and elegant flare that complements a wide range of bathroom designs.

    • 12" (30.5 cm) rough-in
    • Class Five - provides tremendous bulk waste flushing performance and best-in-class bowl cleanliness
    • 3-bolt Installation - Three pre-installed tank bolts save installation time
    • Canister flush valve provides smooth flushing actuation with consistent water usage, flush after flush
    • 1.6 gpf
    • Polished chrome trip lever


    View Diagram Page: 1 K-4468
    Kohler K-9379 Part

    Kohler K-9379

    Wellworth Reversible Trip Lever

    Bring graceful lines and a streamlined design to your bathroom with Wellworth accessories, which incorporate a contemporary sensibility. This sturdy metal trip lever is designed for use with Wellworth and Highline two-piece toilets and works in either left- or right-hand configurations.

    Kohler K-9379 Features:

    • KOHLER finishes resist corrosion and tarnishing, exceeding industry durability standards two times
    • Metal construction for durability and reliability
    • For use with the Highline Collection two-piece toilets
    • Can be used for left-hand and right-hand tank configurations
    • Modern design fits newer Wellworth toilets


    View Diagram Page: 1 K-9379
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