RESTMO Water Flow Meter, Digital Control | 4 Measure Modes | Display Gallon/Liter Usage and Flow Rate | Ideal to Track Outdoor Garden Hose Watering and RV Water Tank Filling

Works well. I measured it's accuracy and it was spot on.

.......if you are going to attach a hosepipe to it, which you will probably want to do, you will need one of these.. Hot Tub Drain Valve Adaptor.... https://www.amazon.co.uk/dp/B0CYQJK4VT?ref=ppx_pop_mob_ap_share This is because the thread on the meter is not UK spec. It WILL leak without this part. There was no mention of this in the product listing otherwise it would have got 5 stars

Out of the box the unit looks quality built; unfortunately, it only reads in gallons; kind of inexplicable why the input connector is brass and the output male connector is plastic which did not squarely fit any of my either plastic or brass female ends; stripped the plastic thread a bit and the female end did not squarely fit though I torqued it down and used teflon tape to seal

I have been using the RESTMO Water Flow meter for over a year on my RV. Excellent for measuring water flow and total gallons when dumping and flushing tanks. Changed the battery once, easy to do. Has worked awesome. Great product will purchase again.

Seems to work great and be accurate. My 5th wheel has a 70 gallon fresh tank on it and it is nice to be able to know how much water is in the tanks. We have learned that we can get by with 45 gallons over 2 weekends instead of waiting 30+ minutes to fill the tank then draining half of it back out afterwards, just because we weren't sure. The display is easy to see in direct sun. I have had 0 issues threading it onto an water outlet that I have tried. No leaks at the connection. Durability seems like it will be good. I have gotten it wet several times and no issues at all. Seems to be very well designed.