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Old 01-29-2014, 07:47 PM   #1
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1974 31' Sovereign
huntingdon , Pennsylvania
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main holding and auxiliary tank

is the main tank the black tank and the aux. the gray tank or is it all just black water for a 1974 soverign 31 ft centerbath? do you know what the sizes of the tanks may be? the bat is curbside and the outlet for the tanks is roadside

thanks
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Old 01-29-2014, 08:36 PM   #2
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Yes. The Main tank is the black tank and the Auxiliary tank is the gray tank.
Why can't they simply be labeled Back and Gray?
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Old 01-30-2014, 12:06 AM   #3
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It's obvious! It was labeled by an engineer. LOL
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Old 01-30-2014, 07:01 AM   #4
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Quote:
Originally Posted by TG Twinkie View Post
It's obvious! It was labeled by an engineer. LOL
I'm an engineer, and I don't think that's it. You have to look at history for the answer…

The "main" tank is used all the time; you're not allowed to let blackwater run on the ground anywhere. Full-time use makes it the main tank.

The "auxiliary" tank is only used when needed; some places still allow you to discharge graywater onto the ground, some don't. Part-time use makes it the auxiliary tank.

Fun facts to know and tell…
The terms "black water" and "gray water" weren't in common use back in the 70's when kokomoscalls's trailer was built. In fact, the terms "whitewater" for unused water, "graywater" for used water not containing human waste, and "blackwater" for used water containing human waste were coined in a patent application filed in January 1974 and granted in October 1975 for a home water filtration plant. Before that, blackwater and graywater were just called "wastewater" with no differentiation as to content. And it wasn't until several years later that the terms first used in the patent application found their way into common use for the marine and RV sanitation industry.

So it was not even possible for your tanks to be labeled "black and "gray" in 1974 before the terms were even coined.
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Old 01-30-2014, 09:11 AM   #5
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I see no one has mentioned anything about the likely size of those waste tanks. The answer would be "SMALL". On my '75 Argosy the black tank is about 15 gallons, and the greywater tank is about 12. The black tank is actually good for quite a while, but that grey tank is only enough for a few careful days with 2 people.
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Old 01-30-2014, 03:37 PM   #6
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My '74 Argosy has a 12 gallon GW tank, as stated above. It's OK for a day or so with careful use.
It is small. That is why I added a 21 gallon Auxillary GW tank. Leaving the old one in place.
I now have 30+ gallons of GW capacity. MUCH BETTER!
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Old 01-30-2014, 08:16 PM   #7
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My 74 manual lists the International center bath as having 17 gallon capacities for both main(black) and auxiliary(grey) tanks.....Phil.
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Old 02-05-2014, 07:38 AM   #8
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thanks for all your help..
are these tanks hard to replace if they leak / can they be replaced with larger also?
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Old 02-05-2014, 10:24 AM   #9
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Yes, you can probably replace with larger tanks. You would probably have to drop your belly pan (not fun but doable), and do some looking to figure out what you could do. New tanks can be expensive. That's why we built ours, but that's another story. There are other options for grey water, such as a Blue Boy that sits outside the trailer and can be towed to a dump station as needed. I wouldn't use it for black, but people do. You will go through a lot more grey water than black water capacity. It's all in how you camp (ie: use campground facilities for showering, etc.). I think '74 was the first year for grey water tanks.
Beautiful trailer on the outside. Got any interior pics? We LOVE pics.....

Kay
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Old 02-05-2014, 10:30 AM   #10
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thanks i will be adding some pics tomorrow
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Old 02-05-2014, 11:02 AM   #11
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pics

interior pics
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Old 02-05-2014, 11:04 AM   #12
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pics

exterior pics
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Old 03-20-2014, 07:44 PM   #13
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No Gray Water Tank, 1967 Caravel

I just discovered this being our first real attempt at RVing that our 17',
caravel 67 only has a black water tank, which is very small. My problem is when it's empty and I use the sinks for a very short time, maybe a minute or so the water comes up through the shower drain, center front.

I would like to ad a gray water tank and would like any suggestions on purchasing one, installing, and suppliers.

Thanks, Jay Moniot
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Old 03-20-2014, 08:49 PM   #14
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Quote:
Originally Posted by kokomoscalls View Post
interior pics
Over all, I would say your '74 looks in fabulous condition, like it has been
well-cared for!

The bathroom looks the roughest of the interior, and it ain't bad. Look it up in your owner's manual, you'll see you can use a very fine sandpaper to get some (most, if they aren't bad) marks out of the counter. The large '70s stick-on flowers were probably put on to hide something, but a heat gun or a hairdryer should get them off.

Did the PO (Previous Owner) tell you that the axles were replaced? They look just too good to be original.

Hard to be sure with the snow on the exterior, but it looks like you have the typical loss of the clear coat. I hope you get a chance to strip it, that's a job I am eager to do on my '74 Sov, and I'd love to see how it looks. Unfortunately can't do it myself.

Great trailer, hope you get it on the road this year!
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