Abstract: An apparatus for pushing a hose along a conduit includes a rotatable reel, a hose wound on the reel, and a driving arrangement for drawing the hose off the reel and for pushing the hose into and along a conduit. The apparatus can also include an arrangement attached to a leading end of the hose for permitting the leading end of the hose to roll along the interior surface of the conduit. Also, a guide can be positioned in the access opening to the conduit in order to permit the hose to move more easily through sharp turns.

Abstract: Coating with clinging foam the upper interior walls of a generally horizontal pipe. A high-pressure pump, connected to a source of water, delivers jetting water to a nozzle through a normally reeled hose. The nozzle has a body divided by a pressure-actuated valve into two chambers, the first one having a series of high-pressure jet exits. The valve is normally open and, when the high pressure is off, leads into a second chamber having a foam outlet. Two pump and metering devices and a compressor then deliver water, chemical and air mixed into a damp sloppy foam to the hose and then, after working at foam to the desired expansion ratio, to the nozzle. A skid supports the nozzle and has a series of skid rods regularly spaced around it so that at any time two of the skid rods engage the bottom part of the wall of the pipe to be coated and hold the nozzle well above the liquid flow in the pipe's bottom.

Abstract: Coating with clinging foam the upper interior walls of a generally horizontal pipe. A high-pressure pump delivers jetting water to a nozzle through a normally reeled hose. The nozzle has a body divided by a pressure-actuated valve into two chambers, the first one having a series of high-pressure jet exits. The valve is normally open and, when the high pressure is off, leads into a second chamber having a foam outlet. Two pump and metering devices and a compressor then deliver water, chemical and air mixed into a damp sloppy foam to the hose and thence to the nozzle. A skid supports the nozzle and has a series of skid rods regularly spaced around it. A gravity-operated device at the outlet is connected to the foam outlet from the nozzle's second chamber and causes expulsion of the foam toward the walls of said pipe lying along a predetermined upper sector only.