aquaHALT 2X – Toilet

The aquaHALT 2X is an automatic toilet shut-off valve that runs on two AA batteries. When water reaches its floor sensor, it shuts off the water to the tank and beeps. The 2X is the original aquaHALT. It uses two 3/8″ water hoses, and you can tuck it away behind the toilet or leave it in view for easier access.

In the box: the aquaHALT unit, a leak detection sensor, a 3/8″ x 3/8″ water supply hose and two AA batteries. You’ll also need a small adjustable wrench and a small level. If your toilet has a 1/2″ hose connector, use an adapter. The sensor connects to the unit by a wire, and there’s no Wi-Fi, no app and no subscription. Assembled in the USA, U.S. Patent No. 10,895,068.

Installing it, in short: close the valve on the wall next to the toilet and flush to empty the tank. If water still gets through that valve when it’s closed, have a plumber replace it first. Move your existing hose from the wall valve to one side of the unit, then run the new hose from the other side to the wall valve, snug but not overtightened. Stick the unit to the wall with its adhesive pad, leaving the hoses enough slack not to kink. Set the sensor so it touches the floor, behind the toilet or at its base, where a level shows leaking water would run. Plug in the sensor, add the batteries and turn the water back on.

To test it, hold the power button for 3 seconds, press “open” to fill the tank, then put a little water under the sensor. It beeps and stops the water. Dry the sensor and press “open” again. It also sounds an alert when the batteries run low. Every step is in the aquaHALT 2X installation manual (PDF), and you can also watch the 2X installation video.