Drywall taping and texture system using pump

A drywall taping and texture system for pumping drywall mastic material from a container filled with the drywall mastic material to a work surface, the system comprising:

• a pump housing immersed in the container filled with the drywall mastic material;
• an air compressor connected to the pump housing;
• a tool for applying the drywall mastic material to the work surface;
• a material line connected between the pump housing and the tool such that there is material flow communication therebetween;
• a control line connected between the pump housing and the tool such that there is air flow communication therebetween;
• an inflatable bladder mounted within the pump housing between upper and lower valves for controlling the flow of the drywall mastic material;
• an air release mechanism;
• and
• an airway connecting the air compressor, the control line, the bladder, and the air release mechanism, such that there is air flow communication therebetween;
• wherein when the air release mechanism closes, the bladder inflates and expands radially and vertically relative to the housing such that drywall mastic material in the pump housing is pumped through the upper valve, the material line, and the tool to the work surface,
• wherein when the air release mechanism opens, the bladder deflates and retracts radially and vertically relative to the housing such that drywall mastic material in the container is pumped through the lower valve into the pump housing.