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Old 05-11-2019, 03:25 PM   #1
Senior Member
Join Date: Oct 2017
Location: Delaware
Posts: 240
accurate fresh water tank levels

I wanted to know almost exactly how much water was in my 40 gal. fresh water tank. From my home hose I timed filling up a 5 gal bucket. From my hose it took 75 seconds to fill the 5 gal bucket. So 8 buckets would fill my 40 gal tank taking exactly 10 minutes. If I fill the tank for just 5 minutes, I would know it half full or 20 gal. 2.5 minutes,,,10 gal in the tank. This is just my way of knowing whats in the tank. The sensors are way off base. Just some helpful info to know.
TT: 2018 Coachmen Catalina
243rbs(rear bath) legacy edition
TV: 2017 Ram 1500
Lee Pedrick is offline   Reply With Quote
Old 05-11-2019, 08:22 PM   #2
Senior Member
Join Date: Mar 2018
Posts: 204
Yep, the factory-installed tank sensors aren't what one would call 'accurate'.

Your system works well -- as long as you *always* fill from the same source (in your case, home), and always have the same flow rate (we'll assume you are running the spigot with unrestricted flow).

If you don't take longer trips where you use all of that water, and need more, then you're fine. But - if you do, then the better (?) solution would be an in-line meter - something like this (I own one):

For what I use it for, it works fine. Accuracy is rated to 1/10th gal (although if you want to be precise, 10% variance isn't exactly what you'd call 'accurate'). Certainly a lot better than something that measures in 25% increments (and for various reasons, isn't even *that* accurate).

For the person who wants to take on 'x gallons' at a time, so that they're carrying only 'what they need' (one example: towing through mountainous terrain), I don't know of a better all-around solution.

There are other, more accurate meters available, I'm sure - but for $16 and change, it does the job, no matter the source. IIRC, it was recommended via this site, so I'm pretty sure there are others here who have / use them.

Now, if you want to know how much water you have *left*, after using part of your tank, the Garnet SeeLevel meter generally gets high marks for 'most accurate'. It reads in 'percent remaining', in 1% increments. A little more expensive, and there's some installation required - but you'll gain accuracy over the grey and black tanks, and the battery, along with the fresh water.

The more expensive versions add LPG level, along with switches for the water heater & water pump.
Reprise is offline   Reply With Quote

fresh water, tank, water, water tank

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