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
Is the Kohler Highline K-3999 a good buy?
At $344, 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) | $343.76 US price from the official Kohler.com product page for the white K-3999-0: shown as "$343.76" with "$458.35 List". priceUsd uses the $343.76 Kohler.com retail price; the list/MSRP figure is $458.35. Both figures appear verbatim on the source page. |
|---|---|
| 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 | $343.76 | gravity | 1.28 | elongated | 12 | two-piece |
| Swiss Madison St. Tropez SM-1T254 | $311.2 | dual-flush | 1.6 | elongated | 12 | one-piece |
| Woodbridge T-0019 | $359 | dual-flush | 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 $343.76 (US price from the official Kohler.com product page for the white K-3999-0: shown as "$343.76" with "$458.35 List". priceUsd uses the $343.76 Kohler.com retail price; the list/MSRP figure is $458.35. Both figures appear verbatim on the source page.), as of 2026-07-13.
How does the Kohler Highline K-3999 compare on price?
At $344, the Kohler Highline K-3999 is #5 cheapest of the 10 toilets we track, where the median is $351.
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.
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