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Old 03-26-2015, 01:32 AM   #1
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'78 Argosy Minuet 7.3 rear bath black water and gray water systems

Does anyone have pictures of a similar setup to mine. I bought this trailer despite the fact that PO ripped out the plumbing and tanks from under the bathroom. I purchased a manual and have searched the inter web and cannot find info on how my system originally was configured, I'm not even sure if it had a gray water tank. Trailer only had a small rectangular tank beneath the toilet above the frame, but the rotted out belly beneath the bath drops down over 10 inches so I assume there used to be a tank strapped in this area. Any photos of this region or advice on how it is configured would be extremely helpful.
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Old 03-26-2015, 03:33 AM   #2
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The black tank sat on top of the floor, under the toilet, in a small "box". The grey tank went under the floor, between the frame rails.
The dump valve for the black tank was at the bottom of the tank, and was accessed through the bumper compartment.
The dump valve for the grey tank was mounted sideways at the tank, and the valve was accessed with a handle at the edge of the left banana wrap.
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Old 03-26-2015, 07:45 AM   #3
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1978 Argosy Minuet 6.0 Metre
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Quote:
Originally Posted by cutndried View Post
Does anyone have pictures of a similar setup to mine. I bought this trailer despite the fact that PO ripped out the plumbing and tanks from under the bathroom. I purchased a manual and have searched the inter web and cannot find info on how my system originally was configured, I'm not even sure if it had a gray water tank. Trailer only had a small rectangular tank beneath the toilet above the frame, but the rotted out belly beneath the bath drops down over 10 inches so I assume there used to be a tank strapped in this area. Any photos of this region or advice on how it is configured would be extremely helpful.

In both my Argosy's the small rectangular tank beneath the toilet above the frame, is the black tank. It is 10 gallons.
In my 74 28' the gray tank is below the floor hooked up to both bath and kitchen sinks and the tub. Also about 10 gallons.
In my 78 6.0 minuet the gray tank is above the floor in the bathroom closet. Hooked up to both sinks but not the tub. Have to let the tub run on the ground or use a portable tank.
I do plan on putting a gray tank under the floor so I can plumb the tub into it and remove the one in the closet for more space.
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Old 03-26-2015, 09:50 PM   #4
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Thanks Geocamper, I'm pretty sure the black tank should be above the floor and the grey tank below. Thanks for the help. The belly area were my gray tank should be is completely rotten from a bad leak left unattended. That compartment is 6 3/4" lower than the rest of the frame structure, I cut everything out below the 3" C channel frame rails which wasn't much, the PO had chopped most of it out. Do you know of any resource that can show me how the factory structured this compartment? I just finished fabricating all new frame outriggers today and am in the thick of welding it all up. Not sure how to frame out the gray tank area.
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Old 03-26-2015, 10:57 PM   #5
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You can probably put a gray tank below the floor, but it was likely above the floor originally as Geocamper says. As for putting the gray tank below the floor, the key is in finding a tank that will fit, figuring the necessary plumbing, welding in support straps to the outriggers and frame, putting the tank in and doing the plumbing. There's not a lot of room in the back after the black tank is in as it rests on the floor but extends below the floor with its valve completely below the floor. Since the toilet is pretty much in the middle of the trailer, it cuts into the space. Add in the length of valve and plumbing and you can see the problem here. I don't have pictures of the plumbing area in my Minuet, so I am going on memory from redoing the valves there.
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Old 03-27-2015, 01:52 AM   #6
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The gray water likely was below the floor because the frame has a very large compartment in the rear below the floor. It measures 68" overall from just behind the axles to the rear bumper. And about 53" between the frame rails. This compartment is almost 10" deep beneath the floor and tapering up to the bumper, this is a huge compartment with plenty of room for a tank but I'm unsure of how it is framed since most of it was rotted or removed. Also, I'm stumped as to where the rear stabilizer jacks should be installed, there's nothing to support them on either side of the tank bay and it appears that the tank bay is too low for stabilizers to be mounted in it.
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Old 03-27-2015, 09:13 AM   #7
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Yes my 28' had the tank below the floor in the area you are describing. My Minuet has that same area under the floor but had the tank above the floor in the cabinet. That is why I will put one under when I remodel so I can plumb the shower to it.

As far as support for the tank, in my 28', the tank had 1/2 inch foam on each side and the bottom and sat in a tin box. The box was supported by an angle iron frame that was just hanging off of the frame above.
The reason for the foam is there was 1-1/2 inch tube from the heating duct to the tank area to keep it from freezing.

As Argonaut suggested, find a tank that fits and plan your welding accordingly.

I have max'ed out my limit for adding pictures to a thread, but if you are on the WEB view vs the iPad view, there might be a picture in my profile. I believe I have a picture of the tank, but not of the frame area. If its not there, send me a pm with your email and I'll send what I have.
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Old 03-27-2015, 09:23 AM   #8
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I looked at my pictures. I do have a frame pic. Send me your email.
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Old 03-27-2015, 09:33 PM   #9
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There is no cross member in the area you describe behind the axle? That's a long run for a 3/4" floor to be unsupported.
Stabilizers attach to the frame. They can be bolted on or welded. You might look at this site for ideas:
HowTo Articles - Vintage Airstream
and
HowTo Articles - 4/5 - Vintage Airstream

He deals with older Airstreams, but there are good ideas there.
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Old 03-28-2015, 12:02 AM   #10
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Thanks again for all the help, the articles are very insightful. My frame is coming along nicely and it seems like it may not be necessary to try to install the new frame components in an identical layout as long as I plan accordingly. Thanks again to all!
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Old 08-12-2015, 05:41 AM   #11
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was the minuet plumbed so that the shower drained on the ground?
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Old 01-02-2016, 04:15 PM   #12
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1979 Argosy Minuet 7.3 Metre
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My 79 7.3 has the grey tank below the floor. The shower drains into it.
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Old 08-10-2017, 04:12 PM   #13
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1979 Argosy Minuet 7.3 Metre
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has anyone with the 7.3 remodeled their bath? i have some questions
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