I posted an update with photos recently. Check the project out at
if you are interested.
You’ll see that the trailer has been carefully de-commissioned inside and out and the pan removed.
The frame was in good condition. Despite 30 years having passed, some of the 1” x 2” steel tubing running lengthways atop the frame was in the original blue-black factory condition.
Nevertheless, Phil sanded and sand blasted the rust that develops around plumbing and where seams in the body panels and belly let in moisture over time.
You can see that the frame, hubs and axles have been primed and painted and we are now ready to move ahead with the remodel.
The first order of business is to decide how to re-plumb the trailer with new holding tanks.
The 1976 Argosy 24D had a 10 gallon black above the floor and a 12 gallon grey below it, both at the rear.
A 10 gal. black is OK. What I don’t want is the tank above the floor, taking up space inside the bathroom.
A 12 gal. grey is unacceptable.
This is our chance to bring the tanks to contemporary Airstream standards or better.
There are four well-situated locations between frame rails and crosspieces were we could install new tanks.
At the rear, 32 x 48 x 8 inches.
Just before the axles 34 x 56 x 9 inches.
Between the axles 30 x 56 x 9 inches
Just after the axles 22 x 56 x 9 inches
These spaces are clear, without having to modify cross struts. The dimensions are outside, allowing for 1” foam insulation all around.
Through Wiltsie, I have access to the Coast Distributors catalog. They carry about 20 different sizes of polyethylene tanks with floors sloping toward 3” outlets.
A tank in a size that would fit the between the axles would give a 43 gallon capacity for instance.
The task will be to find tanks with the outlet in a location that will make convenient plumbing and dumping possible. In the unlikely case that we can’t find one among their stock, we will have to custom order.
Our choices seem to be these:
(a) Install a new black tank, below the floor at the rear, with as much capacity as will fit the space
Install a new grey water tank near the axles, re-plumbing the shower drain and both sinks to this location.
Or, maybe better,
(b) Install a new European style cassette toilet. No black tank is needed; you remove the “cassette” through an access hatch created in the Argosy body.
Keep the present 12-gallon grey at the rear. The shower and bath sink already drain to it. Nothing to change.
Install a SECOND grey, 40 gallons or more near the axles, exclusively for the kitchen sink.
We will try to drain both greys to the present dump valve. If not easily possible, we can have a separate dump at each of the two tanks.
Do you have any suggestions or comments to offer?
I would especially be interested to know if anyone has used, bought or seen a “cassette” toilet.