withdrawal of saturated brine from the tank the outer circular conduit 36 and inner circular conduit 38 are positioned adjacent to the base 22 of the tank and the outer conduit is retained in appropriate position by means of a plurality of overlying z shaped clamp members 48 each of the circular conduits is provided with a plurality of apertures or nozzles 50 such as indicated in fig3 along the length thereof for discharging the liquid such as water preferably in a direction substantially horizontal with respect to the base of the tank the nozzles 50 are preferably disposed at opposite sides of the conduit so as to direct radially inwardly and radially outwardly jets of liquid into the granulated mass of salt compound certain of the nozzles along the inner surface of the inner circular conduit 38 are oriented at an angular inclination as best seen in fig5 so as to direct a portion of the liquid upwardly in the direction of the arrow indicated at 52 toward a stratum immediately above the upper surface of the manifold chamber 30 promoting the dissolution of salt compound thereabove and preventing the formation of a solidified salt strata or cap over the manifold chamber the velocity of the liquid discharged from the nozzles 50 also effects a partial fluidization of the salt particles in the vicinity adjacent to the sparger assembly and the manifold collector assembly tending to counteract any tendency of the granular.