On our first trip out three years ago, when it came time for us to refill our fresh water tank, we waited until the fresh water overflow spilled over, letting us know the tank was full. That meant we guessed and babysat the process. And after voiding our black tank and flushing, we needed to add a few gallons of fresh water into the black tank.
One neighbor who came over to chat said count to 100. Another said he uses his watch and times one to two minutes. Both individuals meant well, but when water volume and pressure differ from park to park, campground to campground, trusting their methodology was unreliable.

Finding a better methodology
It didn’t take us long to look for a more precise method of filling the tanks. We’ve witnessed folks’ fresh water tank spilling water back out. After perusing online forums, it became apparent that plenty of folks are not aware that a simple water meter can make life easy and avoid possible backflow.

We bought the Save A Drop P3 Water Meter and have used it ever since. Now we refill our black water tank each time with exactly 3.8 gallons. You could do the same.
Read the edited article published on May 20, 2021 here: Stop guessing! This water meter won’t let you overfill your tanks – RV Travel
If you choose to order this meter, it has served us well for well over 2 years and counting.
Kate Doherty has been writing for more than 30 years in technical and general media. In her previous business, she and her spouse dealt with special projects within the military/government sector. Recently she published “Masquerade: A Logan Scott Novel” under the pen name Bryan Alexander, a thriller now available in eBook and paperback on Amazon. It’s a page-turner!