Kohler · Updated July 2026
Kohler Highline K-3999: price & specs
Kohler Highline K-3999. Every price and spec below is linked to its source and dated — no guesses.
Source: kohler.com verified ✓ corroborated verify in ledger
Price history
$354.11Is the Kohler Highline K-3999 a good buy?
At $354, the Kohler Highline K-3999 is #5 cheapest of the 10 toilets we track, where the median is $351. On the spec sheet, its flush volume gpf of 1.28 is at the median of the 10, and its rough in inches of 12 is at the median of the 10.
Specifications
| Price (US) | $354.11 — current on record (was $343.76) |
|---|---|
| Brand | Kohler |
| Released | — |
| Flush type | gravity |
| Flush volume gpf | 1.28 |
| Map score | — |
| Bowl shape | elongated |
| Bowl height inches | — |
| Rough in inches | 12 |
| Trapway diameter inches | — |
| Piece count | two-piece |
| Water sense certified | — |
| Seat included | No |
| Weight pounds | — |
Source: kohler.com (verified 2026-07-13) · corroborated by la.kohler.com. The official Kohler US product page (source) identifies this exact SKU as K-3999-0, "Highline Two-piece elongated comfort height toilet, 1.28 gpf," and lists its price as $343.76 (List $458.35) — confirming both model identity and the US price. Kohler's product-detail page (corroboration) supplies the verbatim technical specs for the same 3999 model: two-piece design, elongated bowl, 1.28 gpf, a 2-1/8" fully glazed trapway, a standard 12" rough-in, Class Five canister flush "harnessing gravity," and seat/supply line sold separately. Neither Kohler page states a MaP score, a numeric bowl-rim height, product weight, or an explicit WaterSense certification mark, so those fields are left null rather than guessed.
Is the Kohler Highline K-3999 worth it vs cheaper toilets?
Kohler Highline K-3999 against its closest cheaper and pricier toilets on the specs that matter — every value sourced. See all 10 ranked
| Product | Price | Flush type | Flush volume gpf | Bowl shape | Rough in inches | Piece count |
|---|---|---|---|---|---|---|
| Kohler Highline K-3999 this | $354.11 | gravity | 1.28 | elongated | 12 | two-piece |
| TOTO Drake CST776CEFG | $328.99 | gravity | 1.28 | elongated | 12 | two-piece |
| Kohler Santa Rosa K-3810 | $448.65 | gravity | 1.28 | elongated | 12 | one-piece |
Frequently asked questions
How much does the Kohler Highline K-3999 cost?
The Kohler Highline K-3999 has a US price of $354.11, as of 2026-07-26.
How does the Kohler Highline K-3999 compare on price?
At $354, the Kohler Highline K-3999 is #5 cheapest of the 10 toilets we track, where the median is $351.
Has the Kohler Highline K-3999's price dropped?
No — since 2026-07-25 the Kohler Highline K-3999 has risen 3%, from $343.76 to $354.11; the lowest we have recorded is $343.76 (2026-07-25).
What is the lowest price the Kohler Highline K-3999 has been?
The lowest we have recorded for the Kohler Highline K-3999 is $343.76 on 2026-07-25.
Is now a good time to buy the Kohler Highline K-3999?
The Kohler Highline K-3999 is currently $354.11; the lowest we have recorded is $343.76 (2026-07-25). Every price is dated, so you can judge it against its own history.
What are the Kohler Highline K-3999's key specs?
Kohler Highline K-3999 (Kohler): flushType gravity, flushVolumeGpf 1.28, bowlShape elongated, roughInInches 12, pieceCount two-piece. Full sourced spec sheet verified 2026-07-13.
Price of record: $354.11 at kohler.com, 2026-07-26. Other retailers may be lower — check the current price:
See Kohler Highline K-3999 on Amazon As an Amazon Associate we earn from qualifying purchases.Similar toilets
Nearest in price — swipe to browse. Every pick sourced and dated.
All toilets ranked · Open data & methodology · Queryable via MCP
Compare with
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Step up
- Kohler Santa Rosa K-3810 $448.65
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