The four small cylinders shapes are drilled out. The air is brought in thru the handle. There is a long air space perpendicular behind the four cylinders with a brass plug in each side approximately 3/8 to 1/2 inch in diameter. The plug can be removed to clean excess cement out to keep the air passage way clean. A small steel or brass sleeve approximately 1/16” to 1/8”. It has been pressed or driven into the center of the four small cylinders at the backside and the bottom of the sprayer. The air flows thru the cylinders and pushes the cement out thru the four ¾” holes in the front.

The side view of the hopper spray handle is centered and comes into the backside of the hopper sprayer. Air comes into the sprayer thru this handle.

This hopper sprayer needs to be improved. I am requesting pricing on the bottom portion of this sprayer; I believe it to be cast aluminum. The back of the bucket or top back side of the bucket the same so the spray man can wear a harness with straps and he can clip the harness to the back of the hopper.