Waterdrop Instant Hot Water Dispenser, Reverse Osmosis System, K6

The Waterdrop K6 combines a 600 GPD under-sink reverse osmosis system with an instant-hot smart faucet, dispensing both purified cold water and near-boiling water at the sink. Tea, coffee, and cooking prep skip the kettle entirely.

Five filtration stages centered on a 0.0001-micron RO membrane reduce lead, chlorine, fluoride, arsenic, nitrates, PFAS, VOCs, and dissolved solids. The tankless design keeps the cabinet open and avoids storage-tank stagnation.

The composite filter is rated for 12 months or roughly 1,100 gallons, with a quick twist-out replacement.

Shipping rates are calculated at checkout based on weight and destination. Most orders ship within 1-3 business days directly from the manufacturer's warehouse; ground delivery typically takes 3-8 business days.

See our Shipping Policy for full rate and delivery details. Questions? Contact contact@reinwaterusa.com.

All under-sink water filtration systems sold by Rein Water USA include manufacturer warranty. Crystal Quest systems carry a limited warranty — see product listing for terms. Brondell systems include a 1-year limited warranty on parts and labor, excluding consumable filters.

To make a warranty claim, contact contact@reinwaterusa.com with your order number and proof of purchase.