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09-27-2018, 04:05 PM
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#1
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Junior Member
Join Date: Sep 2018
Location: Maine
Posts: 2
SUN #10904
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Holding tanks
What size are the holding tanks in my 05 25' sunline?
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09-27-2018, 10:12 PM
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#2
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Moderator
Join Date: Dec 2006
Location: Michigan
Posts: 6,155
SUN #123
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Hi Jon,
Holding tanks were all different depending on the floorplan, and there were a few that are about 25'. Do you know your model number?
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2007 T-286SR Cherry/Granola, #6236, original owner, current mileage: 9473.8 (as of 6/18/21)
1997 T-2653 Blue Denim, #5471
1979 12 1/2' MC, Beige & Avocado, #4639
Past Sunlines: '97 T-2653 #5089, '94 T-2251, '86 T-1550, '94 T-2363, '98 T-270SR
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09-28-2018, 03:56 AM
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#3
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Junior Member
Join Date: Sep 2018
Location: Maine
Posts: 2
SUN #10904
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I have a T-2553. Rear bed room, center bathroom forward kitchen (I think the same one that's on the home page for this site).
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09-28-2018, 06:21 AM
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#4
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Senior Member
Join Date: Jun 2011
Location: New Jersey
Posts: 544
SUN #2366
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40 gal. fresh, 35 gal. gray, 25 gal. black according to brochure.
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09-28-2018, 12:20 PM
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#5
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Junior Member
Join Date: Sep 2018
Location: Maine
Posts: 2
SUN #10904
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Thank you.
I saw in a deconstruction photo on this forum a clock hanging by the door. Did they come with the campers? I have the same clock by the door in my camper.
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10-01-2018, 06:58 PM
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#6
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Moderator
Join Date: Dec 2006
Location: Michigan
Posts: 6,155
SUN #123
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Quote:
Originally Posted by camper Jon
Thank you.
I saw in a deconstruction photo on this forum a clock hanging by the door. Did they come with the campers? I have the same clock by the door in my camper.
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For your year, yes. Clocks were pretty much standard from the early '90s through 2007.
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2007 T-286SR Cherry/Granola, #6236, original owner, current mileage: 9473.8 (as of 6/18/21)
1997 T-2653 Blue Denim, #5471
1979 12 1/2' MC, Beige & Avocado, #4639
Past Sunlines: '97 T-2653 #5089, '94 T-2251, '86 T-1550, '94 T-2363, '98 T-270SR
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10-04-2018, 10:57 AM
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#7
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Junior Member
Join Date: Sep 2018
Location: California
Posts: 5
SUN #10869
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General info on determining the size of a flat-sided tank...
Crawl underneath with a tape measure and get the height, width and depth...
For example in my old Fleetwood Class A the literature was contradictory - one brochure said that the fuel tank was 40 gallons, another said 60.
So I measured mine...
Numbers: 54 inches from front to back, 26 inches wide, and 13.5 inches tall...
54 times 26 times 13.5 equals 18,252 cubic inches...
There are 231 cubic inches per gallon... so my tank was roughly 82 gallons!
(Yes, in the calculations I was ignoring the thickness of the walls of the tank)
So both brochures were wrong!
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10-04-2018, 10:17 PM
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#8
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Moderator
Join Date: Nov 2006
Location: Ohio
Posts: 12,643
SUN #89
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On the Sunlines, the brochures used the wording fresh water "system capacity". It said my camper had 40 gallons. So I took that as meaning the physical tank was 40 gallons. Then one day I measured the outside of the tank, length, width and height and came up with cubic inches and divided by 231 cubic inches per gallon.
Well no way did I have a 40 gallon tank. What I thought I had is 6 gallons of water in the water heater, 2 gallons in the piping system and 32 gallons in the fresh tank by backing in from the 40 gallons as shown in the brochure. In reality I would have 32 gallons of usable water until the pump sucks dry but I have added 40 gallons of weight when I started. All depends on what one is wanting to know.
Then last year I dropped my fresh tank down and low and behold, on top of the tank is molded in, 38.5 US gallon??? Now I'm not sure how they figured this. If I add the 6 gallons of water heater, 2 gallons of piping and 38.5 gallons of max tank capacity as stamped in the tank, I would have 46.5 gallon system.
In my case, I made a bad assumption on the wording they listed in the brochure for the freshwater. They did preference the rating with "approximate". Do not know how much rounding up or down they use.
They use the same wording (system capacity) on the gray and the black tank. Those tanks are rounded and not as easy to back calculate. I have not tried yet either. For the black tank, there is only a short piece of pipe between the toilet and the tank, so that might be the tank size. For the gray, well there are a lot of 1 1/2" pipes that can fill up before water backs up in the shower. At this point short of filling 5 gallon bucket of water and pouring it down the drain to measure how many gallons I can put in, makes me really not know what the gray tank size really is.
Thanks
John
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Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC
Google Custom Search For Sunline Owners Club
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10-05-2018, 05:06 AM
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#9
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Senior Member
Join Date: Jun 2011
Location: New Jersey
Posts: 544
SUN #2366
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Great info, John. I was unaware that Sunline included pipe capacity in their tank numbers.
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