Back in 1985 the company I joined used Holloway Aquarius twin tanks and a drag wand.
The solution tank stood about 3 1/2 feet tall, was square and made of stainless steel. It had a Stuart pump if I remember correctly, and had a kettle element for a heater. The waste tank was similar in size, round and again stainless steel with a single 2 stage vac sitting in a housing on the top (looked like a glorified oil-drum on wheels). The drag wand had a roller at the back and a ruddy great lump of brass on the front to weigh it down. The tanks used to lie on their backs side by side, with the wand in between them in the back of an escort van, there wasn't a lot of room then for anything else except a Gloria pre-spray and a few spotters.