Kohler 4-inch Flush Valve Toilets (Champion 4 et al.)

Kohler offers 26 4-inch flush valve toilets models in the lineup we track. This page is the Kohler-specific cut of the broader 4-inch Flush Valve Toilets (Champion 4 et al.) toilets category — same product class, narrowed to the Kohler catalog only.

About Kohler

<p>Kohler's water filters lineup is one of the most-shopped in the category — and there are concrete reasons it stays that way year after year. This page is the complete index of every Kohler water filters model we currently track, with verified specifications, current Amazon pricing, aggregated ratings, and head-to-head comparison links against the strongest competitors in each price tier. Before you start filtering, the next several minutes will give you the context you need to make a confident pick.</p> <h2 id="brand-overview">About Kohler in water filters</h2> <p>On warranty length, buil...

For the complete Kohler lineup across all sub-types and capacities, see the Kohler Toilets hub.

Kohler 4-inch Flush Valve Toilets (Champion 4 et al.) models we track

• Kohler Cimarron Comfort Height Elongated Toilet (K-3589-0) — Kohler Toilets — verified specs and current Amazon pricing.
• Kohler Highline Classic Two-Piece Elongated 1.28 GPF Toilet (K-3949) — Kohler Highline — the volume value-tier Kohler two-piece. Class Five flush, comfort height, 1.28 GPF.
• Kohler Memoirs Stately One-Piece Elongated 1.28 GPF Toilet (K-3933) — Kohler Memoirs Stately — classic-styled designer one-piece with AquaPiston flush.
• Kohler Wellworth Classic Two-Piece Round 1.28 GPF Toilet (K-3987) — Kohler Wellworth — landlord-rebuild-grade Kohler two-piece. Class Five flush, broadly stocked.
• Kohler Maxton One-Piece Elongated Skirted Trapway Toilet (K-31621) — Kohler Maxton — modern one-piece with skirted trapway and AquaPiston canister flush.
• Kohler Santa Rosa Comfort Height One-Piece Elongated 1.28 GPF Toilet (K-3810) — Kohler Santa Rosa — value-tier Kohler one-piece with AquaPiston canister flush. Compact elongated, comfort height.
• Kohler Veil Smart Integrated Bidet Toilet with Tankless Flush (K-5401-0) — Kohler Veil Smart — premium tankless smart toilet with integrated bidet wash, heated seat, and Reach flush technology.
• Kohler Numi 2.0 Intelligent Toilet with Alexa, Bluetooth Speakers (K-4026-0) — Kohler Numi 2.0 — the broadest-feature US luxury smart toilet. Alexa, Bluetooth speakers, mood lighting, foot-warmer, every smart feature.

Other 4-inch Flush Valve toilets brands

If you're cross-shopping 4-inch flush valve toilets beyond Kohler, the following brands also ship in this category:

• TOTO 4-inch Flush Valve
• American Standard 4-inch Flush Valve
• Niagara 4-inch Flush Valve
• Eljer 4-inch Flush Valve
• Swiss Madison 4-inch Flush Valve
• Woodbridge 4-inch Flush Valve
• Delta 4-inch Flush Valve
• DeerValley 4-inch Flush Valve

About 4-inch Flush Valve Toilets (Champion 4 et al.) toilets

A 4-inch flush valve is the largest flush valve sold in US residential toilets. The standard residential flush valve is 2-inch or 3-inch; 4-inch is the rare premium specification, found primarily on the American Standard Champion 4 line. The larger valve moves water from the tank to the bowl at much higher velocity than a 2"-3" valve, which means stronger flush performance at the same GPF.

Flush velocity = (tank water volume × valve diameter) / time. A bigger valve = more velocity per gallon of water. For a 1.28 GPF toilet:

• 2-inch flush valve: flow rate ~30 seconds per gallon
• 3-inch flush valve: flow rate ~15 seconds per gallon
• 4-inch flush valve: flow rate ~7 seconds per gallon

The 4-inch valve dumps the entire 1....

For the complete 4-inch flush valve buyer's guide (all brands, full comparison framework), see the 4-inch Flush Valve Toilets (Champion 4 et al.) category hub.

Other Kohler filters

Explore Kohler from other angles:

• Kohler Portable Toilets
• Kohler Bidet Toilets
• Kohler Comfort Height
• Kohler Composting Toilets
• All Kohler Toilets