U-Flow-Water-Gauge-Arctic-Hayes-888000-p-The-Arctic-Hayes-U-Flow-Water-Gauge-has-an-innovative-design-The-clear-see-through-body-allows-the-gauge-to-be-easily-read-It-has-opposing-flow-rate-measures-on-each-side-of-the-body-so-you-can-measure-the-flow-rate-in-litres-or-gallons-per-minute-p-p-This-is-a-vital-piece-of-equipment-when-preparing-a-new-installation-Simple-to-read-and-easy-to-use-this-is-a-must-have-for-plumbers-Compatible-with-the-998731-stem-thermometer-for-water-temp