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Old 09-12-2013, 01:19 PM   #1
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Freshwater Tank Capacity

My Work & Play 16UL supposedly has a 110 gallon freshwater tank (the "yellow" weight sticker says to count 916 lbs. towards cargo weight when the freshwater tank is full) . I've got an accurate water meter that I use to flush out my black (25 gal.) & grey tanks (38 gal.). When I try to fill my freshwater tank it starts spitting back air & water back through the small vent hole (located next to the main water input) when my water meter only reads 65 gallons.

Is it normal for it to spit that early? Should I continue to fill until I get water actually flowing out of the water input hole?

I've attached pics of my freshwater tank. For those of you who have the 110 gallon tank, does this tank in this picture look similar to yours?

Thanks!
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Old 09-12-2013, 03:42 PM   #2
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I would suggest that you measure it and then calculate the volume from that.
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Old 09-12-2013, 04:02 PM   #3
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Fresh Water Capacity on an RV typically includes the water in your water heater. That said, 65 gallons is still low. On mine, the tank never get to more that 7/8 or so full, because the fill pipe and the vent are located on the side of the tank. and the plumbing runs almost completely horizantal (flat) to the fill port, so any more that I try to foce in, just runs right back out....
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Old 09-12-2013, 04:13 PM   #4
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Fill your tank sllllllooooooowly that's the key and your problem.
If you just turn your hose on and let it rip the air cannot escape faster than the water going in.
You can actually damage your tank by filling to fast.

Thank me later


Turbs
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Old 09-12-2013, 04:17 PM   #5
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Quote:
Originally Posted by BarryD0706 View Post
I would suggest that you measure it and then calculate the volume from that.
If it was actually just a case of length x width x height, I'd say this would be a good idea. However, did you happen to notice the 6 irregular-shaped, large "indents" on the bottom? Measuring all that and subtracting that volume would be a bit much--at least for me Thanks, though!
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Old 09-12-2013, 04:32 PM   #6
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Originally Posted by f1100turbo View Post
Fill your tank sllllllooooooowly that's the key and your problem.
If you just turn your hose on and let it rip the air cannot escape faster than the water going in.
You can actually damage your tank by filling to fast.

Thank me later


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Good point. However, I didn't just let 'er rip. I turned the flow rate down quite a bit when it started spitting air and water. That didn't help, so I stopped for the very reason you mentioned--I didn't want to risk damaging the tank. I looked at the water level (tank is somewhat translucent) and it appears the water level was just below the fill-hose which connects to the tank. The small vent is in the same area. It appears to me the tank is about 80% full with approx. 60 gallons of water. I'm guessing it's very possible there' nothing wrong with the tank and a freshwater tank with less capacity than advertised was installed inadvertently.
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Old 09-12-2013, 04:37 PM   #7
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100 gallon tank would be approximately 72"x18"x19"
If that helps.....
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Old 09-12-2013, 05:14 PM   #8
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I think that tank is nowhere near 18 or 19 deep, not even considering the indents...
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Old 09-12-2013, 05:20 PM   #9
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This might help finding the actual size to gallonage.
http://www.plastic-mart.com/category...FWpk7AodKnQAnQ
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Old 09-12-2013, 05:33 PM   #10
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Measure the tank and multiply length times width times height and multiply times .004329. THAT calculation will give you the gallon capacity of the tank.

1 cu.in. = .004329 gallons. For example, a tank 72" X 72" x 4" is about 90 gallons.

If you are really serious about it, measure and subtract the indents or just SWAG it.

It would also probably help to fill it if you figured out where the vent tube connects to the top of the tank and roll THAT side of the unit up onto 2 x 4s or something else to raise it a bit and get the inevitable bubble to the vent.

Also, a gallon of water = 8 pounds.

Tim
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