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Old 10-25-2024, 11:28 AM   #1
suny07
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2024 Montana 3132RL - Freshwater capacity

Hi,

I was under the impression we have 70 gal freshwater capacity.
As we use the Monti at the moment of the grid I was confused that I could not get more 6 gal jugs into the freshwater tank and bought a flow meter.

Attached results after filling my empty freshwater tank.

Am I missing something?
Best idea I have that the hot water tank is calculated into the 70 gal

Thanks for input

Mike
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Old 10-25-2024, 12:44 PM   #2
AZ Traveler
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The spec has changed from 66 to 70. The tank is 50 and the rest is in the water heater and lines. So only about 50 easily usable.
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Old 10-25-2024, 12:51 PM   #3
Mikendebbie
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The 2024 specs online say 70 GALLONS!
I scrolled thru past models just to compare…
2023 models - 70 gals
2022 2021 2020 - 66 gals
2019 and older were 66 gal
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Old 10-25-2024, 08:23 PM   #4
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I had the same revelation with my 2022 3131CK…fresh tank full at about 51-52 gallons. Learned that the water heater (12 gal) is included in the 70 calculation, but still find it hard to believe that the missing 6-7 gallons could. E on the water lines, but that’s what I understand. Frustrating as so many other similar RVs from other companies have far larger tanks all around.
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Old 10-25-2024, 08:35 PM   #5
MandK
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3 gallons of pink fills my water lines and then some. Never measured how many gallons of water to fill the tank.
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Old 10-26-2024, 02:52 AM   #6
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On my 2019 the spec sheet shows 66 gallons fresh water "capacity", which I learned was 12 gal in the water heater, 52 gal in the fresh tank and 2 gal in the lines. It is quite misleading and it seems most salespeople don't realize that either.
Your flow meter seems spot on with my experience.
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Old 10-26-2024, 06:11 AM   #7
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OK, cool, Thank You
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Old 10-30-2024, 01:16 PM   #8
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Same here flow meter fill fresh water 50-51, 12 gallon water heater & a couple gallons in the lines = 66 2019 3121RL
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Old 10-30-2024, 01:26 PM   #9
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Our 2022 3121RL also advertised 66 gallons. I could not get more than about 35 gallons of useable capacity from the fresh tank. I've measured 12 gallons in the water heater, but only about 1/2 half to 1 gallon in the water lines. It didn't add up. I ripped open the belly to find out why.

I was very disappointed at what I found: a 40 gallon fresh tank that was so poorly installed with a sagging belly so that almost 5 gallons of water was stagnant and couldn't be drained or sucked up by the water pump!

I then installed lateral braces to fix the sagging belly so I could use all 40 gallons. That's still disappointingly little capacity, so I decided to use the cavernous empty space in the belly to install a second 40 gallon water tank. We now have 80 gallons of fresh water plus 12 in the water heater, and I added a 0.7 gallon accumulator tank that reduces the cycling of the water pump with a side benefit of making it almost silent.

I've attached a picture where I tried to get perspective of how badly sagging the water tank was.
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