Unlike most water timers, this simple water meter controls the volume of flow rather than the duration. Turn the dial to the desired amount and let the tap run; the meter automatically stops the flow once that quantity has been released. The paddle-drive mechanism operates without batteries, and a manual override lets you bypass the meter. Volume markings are shown in metric and Imperial (up to 5000 litres/1200 gallons).
To give you an estimate of how long it will take to release the pre-set volume, approximate time increments are also marked (based on a typical flow rate of 60 psi). The meter mounts on any standard threaded faucet and works with water pressure from 10 to 120 psi. A straightforward way to regulate water consumption.