An innovative design of flow cup, exclusive to Arctic Hayes. A clear, see-through design allows gauges to be easily read. With opposing flow-rate measures on each side of the body, so you can measure the flow rate in litres or gallons per minute. 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. • New innovative design • Simple and easy to use • Compatible with the 998731 stem thermometer for water temperature testing • Measure in metric or imperial (L/GAL) • Robust, heat resistant • Flow measure range; 1-5 GAL & 4-22 L