Chicago House Wrecking Company · Chicago House Wrecking Company · leaf 105
mount of air under pressure, to raise the pressureto the proper point. The air being elastic, will of course expand and force the water outof the tank at the least opportunity. By connecting a line of piping with this tank, which is usuallytaken out of the bottom of the tank and carrying it around… … Fig. 59. AP 21 Outfit Air Pressure. The great advantage of a system of this kind, is that you can raise the pressure to any point youdesire witliiu 100 lbs. The tanks which we furnish with our outfits are very heavy, strong and sub-stantially made in every way, the horizontal seams being double…
