Holloway Aqaurius Twin Tanks and weighted drag wand.
Large retangular stainless steel solution tank with Stewart pump, a cylindrical waste tank with a large single vac motor on the removable top section, some wire reinforced vac hose that used to compress when the vac was put under load, all connected to basically a piece of bent metal with a whopping lump of brass to weigh the thing down and a rear roller to move the thing back & forward. They used to sit snugly side by side on their backs with the drag wand slipped up between them, in the back of an Escort van, along with a Columbus Dixon D1 rotary and a 10 litre sprayer.