The flywheel is damaged. Must install a garden hose on the outlet and make sure the water flow is 0.6GPM (2.5LPM) at least. Here are tips to test the counting performance: Make sure the counting unit (liter/gallon) is correct. The IPX6 waterproof grade ensures more stability for outdoor use. Rugged design with premium heavy duty ABS material, this water meter is weatherproof and durable, great to resist UV, sunshine, and rain. Stones or dirt block the flywheel. Garden Hose Nozzle Restmo Water Flow Meter For Outdoor Garden Hose Watering India | Ubuy Rv Water Hose 1 FLOW MODE 2 CONSUMPTION MODE 3 AVG MODE 4 TOTAL MODE Require us for a new replacement. Reset data when long press the button at other modes. The filter is clogged, if so, clean or replace the filter. 3. Water meter does not count correctly. Water meter counting has ±5% tolerance. Short press the button to change the mode from FLOW / CONSUMPTION / AVERAGE / TOTAL. The LCD screen goes to sleep automatically if there is no operation/water flow in 1 minute. 360° rotating inlet and 3/4 hose thread easily connects to garden hoses or hose nozzles without additional adapters. RESTMO Water Flow Meter with Brass Inlet Metal Thread, Measure Gallon/Liter Consumption and Flow Rate for Outdoor Garden Hose Watering, RV Water Tank Filling, Lawn Sprinkler and Nozzle Sprayer 4.5 out of 5 stars 2,359 Why Choose RESTMO Water Flow Meter? 1. Water meter is leaking.