I have some questions regarding my 2016 Grandby’s water tank, and I didn’t think I needed to start a new post as some post here have related issues. My Grandby has the side dinette and hot water option. My questions are how accurate is the water tank monitor and how much water in my tank is actually available via the pump and how many gallons is it really. Not 20 according to my rough measurements and calculation.
When the tank monitor showed one red light “E”, so I assumed it means empty, and I continued to get water until the pump does not shut off anymore. Then I added 14 gallons to the tank and the monitor showed four red lights.
So, good thing that I was bored and have some time and decided to take a look st my tank...
After removing about 30 screws, including one with square head to enable the cover over the tank to be removed...couldn’t FWC hire someone from IKEA to designing easier way?
Anyway, I measure my tank to be about 24x14x13, and these are approximate as I can’t get precise length due to access to one end, which translate to 18.9 gallons when cu inches total is divided by 231. I see the tank is full up about 2 inches below the top but the monitor shows it is full after adding 14 gallons from two 7 gallons containers and I could of added couple of gallons more...I usually fill up with hose until water spills out.
I am guessing the outlets at the bottom of the tank is not at the very bottom so there may be couple of gallons left in the tank which the pump can not pump out at level surface. I guess I should be able to test and verify all this by experimenting. Anyone have figure it out how best to manage the tank more precisely? I know now to not trust the monitor. A visual gauge through the front panel would be nice.