the runs between the first and second rows is transferred generally horizontally along the top of the chamber to the third and fourth rows and such that they advance downwardly in the runs between such rollers a water trough 36 is positioned immediately below the fourth row 34 of rollers and adjacent the outlet slot 26 and a guide roller 38 is positioned within the water trough for guiding the advancing fabric from the lowermost roller 28 of the fourth row 34 into the water trough and then outwardly through the outlet slot 26 the water trough 36 includes an inlet pipe 40 for supplying water to the trough and a drain line 41 also an adjacent overflow trough 42 is positioned adjacent the water trough 36 and the overflow trough 42 includes a drain line 43 thus water may be continuously circulated into the water trough 36 and so that it spills into the overflow trough 42 and is then removed from the overflow trough by the drain line 43 the first and second opposite walls 11 12 of the steamer are composed of inner and oauter sheet metal layers with an insulating material disposed between the layers also the lower portion of the first wall 11.