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Old 04-19-2013, 04:04 PM   #1
Join Date: Dec 2012
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Question Water tank capacity

After unsuccessfully researching the Internet to find out the capacity of my water holding tank I now pose the question to the "experts"! I have a 2002 36 ft Damon Intruder motor home. I am getting ready to sanitize my water tank and need to know its capacity so I know how much bleach to use.....anyone have any idea?

Linda and
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2002 Damon Intruder
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Old 04-19-2013, 04:11 PM   #2
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Measure your tank. Multiply length X width X height in inches to calculate the cubic inch capacity. Use this convertor to obtain gallons:

Cubic Inches to US Gallons (Liquid) conversion

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Old 04-19-2013, 04:16 PM   #3
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An easy way is to time how long it takes to fill up a 5 gallon bucket. Then fill up you empty RV tank and see how long it takes. Do the math (I always wanted to say that.).
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Old 04-19-2013, 04:25 PM   #4
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One way in the absence of a water flow meter, with an auxiliary water pump, you can pump and empty a 5 gal buckets of water into your water tank and count the gallons needed to fill the coach. OR manually pour 1 gallon jugs into your fill spout.
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Old 04-19-2013, 04:27 PM   #5
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Here's a previous thread where another member puts it at 100 , which I'm sure is close enough.

1996 Damon Ultrasport 3520B Questions

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Old 04-19-2013, 04:33 PM   #6
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My 1999, intruder has a label on the inside of the kitchen cabinet with that info. Look around in the various cabinets, and closes, it my have that info. I think mine is 100 gal
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Old 04-19-2013, 05:03 PM   #7
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Fill it. Measure gallons as you drain it.

Curious why it matters and what you would do if it is not enough.
Dave and Nola, RVM1
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Old 04-19-2013, 06:51 PM   #8
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Originally Posted by CampDaven View Post
Fill it. Measure gallons as you drain it.

Curious why it matters and what you would do if it is not enough.
He said he want to know capacity to know how much bleach to use to Sanitize the tank. Doing the filling or draining methods above will get you close enough.
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Old 04-19-2013, 07:21 PM   #9
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Here's the brochure for your Intruder. It states 100 gallons.


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tank, water

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