Lower your water consumption and save space in your bathroom with the SinkPositive gray water system!

Supports good hygeine! Saves space in your bathroom! Conserves water! Installs in minutes!

As water prices continue to rise, Sink Positive offers a win for the environment and your wallet. It is a sink basin that fits on top of your toilet tank. It delivers a touch-free, clean hand wash with every flush. It’s simple to install, and even easier to use. It is a great reminder for everyone in the house to wash their hands every time. Kids just think its fun!

Made of high-quality, recyclable plastic, Sink Positive retrofits most current toilet tanks—including low flow models.

When you flush your toilet, clean water from the supply line that would normally refill your tank is instead routed through the Sink Positive faucet. You use the flow to wash your hands without having to touch the faucet. The soapy water drains into your toilet bowl, where it is used for the next flush. This process saves about two gallons of water per person per day.

We offer two models, the standard and the deluxe. Each model has the same base, with faucet designs that differ slightly. The standard model features our basic faucet, while the deluxe model adds an aerator to reduce splashing and improve water flow.

Set-up for each model is easy and takes 5 minutes or less, no plumber required.


  • CONSERVES WATER Fresh, clean water for your hands, grey water for the bowl. Saves up to 2 gallons of water per person per day.
  • SAVES MONEY Identifies costly leaks through visible drips and reduces utility bills by saving water—Sink Positive pays for itself. + MANAGE SMALL SPACES Create more space with the ultimate small space solution.
  • PROMOTES SANITATION The touch-free wash eliminates interaction with germs on faucet knobs and handles.
  • ENGAGES ALL AGES Convenient and immediate visual cue inspires hand washing of even the smallest hands.
  • INSTALLS IN MINUTES Setup takes 5 minutes or less. No plumbing skills, batteries or tool kits required.