Apparatus for wet treatment of cloth in endless rope form through a treating chamber in the presence of a treating liquid, with the cloth rope being circulated through a cloth return tube that communicates with the ends of the treating chamber. A front venturi introduces treating liquid into the cloth return tube to apply impetus to the cloth rope to draw it from the treating chamber and circulate it back through the cloth return tube into the other end of the treating chamber. An optional rear venturi introduces treating liquid at the entry of the cloth return tube into the treating chamber to pull the cloth from the cloth return tube and direct the cloth and treating liquid upwardly against a deflecting plate that is adjustbaly positioned in the treating chamber to intercept the cloth and treating liquid, with the deflecting plate opening the cloth to substantially the full width of the treating chamber and direct it upwardly and forwardly for forming into folds that compact to form a plug of the cloth rope that progresses through the treating chamber. The circulating treating liquid is maintained at a predetermined level in the treating chamber and the deflecting plate directs the cloth above the liquid level so that air is entrained in the folds of the cloth plug to facilitate reorienting of the cloth as it is formed into folds and, thereby, minimizes creasing. The cloth plug is formed with an exposed portion above the level of the treating liquid in the treating chamber which exposed portion is sprayed with circulating treating liquid from a plurality of openings spaced longitudinally along the top of the inside of the treating chamber. The circulating liquid being sprayed from the openings provides multiple treatment locations for the progressing cloth plug and wets the interior surface of the treating chamber to prevent condensation and dripping of condensate onto the exposed portions of the cloth plug.The front venturi is incorporated in a liquid injection nozzle assembly that is removably mounted in the cloth return tube and has nozzle segments that are removable and adjustable in spacing to allow for modification of the capacity of the venturi to suit necessary handling requirements for various weight and type fabrics being treated.