Fresh water tank capacity

[Bob Denman]

Originally Posted by 71_340

That is incorrect! You can count the water above the ball valve. It is still considered fresh water until you flush it down and it becomes black water at that time. The caveat to tis is that you keep the inside of your toilet bowl "tidy".

That is my scientific input on this subject.

https://www.thorforums.com/forums/at...1&d=1623845639

[pneumatics]

How much water you can get in is dependent on how level the tank is and what direction, the position of the overfill port on the tank, the routing of the overfill drain hose or pipe, the temperature of the tank (it's plastic!), etc.

And those P3 meters have a stated accuracy of +/- 1/10 th of a gallon! This is 10% so the meter could read 50 gallons and you have 45 gallons or 55 gallons.

The manufacturer's of the plastic tanks have a +/- also on what the tank can hold, notice that most say NOMINAL which means it will vary.

[16ACE27]

Originally Posted by pneumatics

And those P3 meters have a stated accuracy of +/- 1/10 th of a gallon! This is 10% so the meter could read 50 gallons and you have 45 gallons or 55 gallons.

They are stated "Accurately Measures To 1/10th Of A Gallon" which means they have a digital resolution to 1/10th of a gallon. There is no stated meter accuracy so what you say may or may not be true. Since they operate by the "paddle wheel" method they are probably less accurate at low flow rates and more accurate at higher flow rates, but the reading is never scientifically accurate.

[Travelin' Texans]

Originally Posted by pneumatics

How much water you can get in is dependent on how level the tank is and what direction, the position of the overfill port on the tank, the routing of the overfill drain hose or pipe, the temperature of the tank (it's plastic!), etc.

And those P3 meters have a stated accuracy of +/- 1/10 th of a gallon! This is 10% so the meter could read 50 gallons and you have 45 gallons or 55 gallons.

The manufacturer's of the plastic tanks have a +/- also on what the tank can hold, notice that most say NOMINAL which means it will vary.

Similar to the coach tank sensors that are +/- 10 - 50 gallons.

[The Gritz Carlton]

If that tank is 2 gallons off, I'd park it until I got it fixed..that's dangerous. Slides not working, jacks dropping...keep running, but water tank off 2 gallons...park it...serious stuff.

[16ACE27]

Originally Posted by The Gritz Carlton

If that tank is 2 gallons off, I'd park it until I got it fixed..that's dangerous. Slides not working, jacks dropping...keep running, but water tank off 2 gallons...park it...serious stuff.

You forgot the "sarcasm font".

[Badmanrick]

That makes sense I forgot about the variance of the meter. It is after all an inexpensive meter.

[Jimbo56]

Originally Posted by The Gritz Carlton

If that tank is 2 gallons off, I'd park it until I got it fixed..that's dangerous. Slides not working, jacks dropping...keep running, but water tank off 2 gallons...park it...serious stuff.

Take it to a dealer and let it sit for a couple of months. That’ll fix it.

[Mwild]

After fresh water tank is filled turn on your water heater to get the extra 6 gallons in that tank. then you can add more water.