Best Dual-Flush Conversion Kits (and the Toilets They Actually Fit)

Sat, 12 Sep 2026 00:00:00 +0000

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The Danco HydroRight HYR460 is the best dual-flush conversion kit, because it turns an old 3.5-gallon toilet into a 1.6-gallon full flush / ~0.8-gallon half flush for about $33 — if your toilet fits it. And fit is the entire game: this kit works with 2-piece toilets with a 2-inch flush valve and a tank tall enough for the overflow tube; it will not fit 1-piece toilets or 3-inch flush valves. That compatibility guidance is the differentiator, because most of the frustration in this category is people buying a kit their toilet was never going to accept. The honest variant note: Danco also sells the HYR451T lever-style sibling, but its listing currently shows no featured offer, so we only recommend the HYR460 push-button version. Toilets are the single biggest indoor water user — nearly 30% of an average home’s indoor consumption — so this is one of the highest-leverage swaps you can make.[1] Start with is your toilet running? the leak test to rule out the silent leak that wastes more than any flush, then how to lower your water bill for the full plan. The direct buy is the Danco HydroRight HYR460 on Amazon .

Toilet on Utility Explained

Best Dual-Flush Conversion Kits (and the Toilets They Actually Fit)

Quick Answer