AODD Pumps | Double Diahragm Pumps. Metex Corporation Limited is a leading manufacturer's representative and distributor of AODD Pumps (Air Operated Double Diaphragm Pumps) for a wide range of industrial markets â including chemical, mining, oil & gas, power generation, pulp and paper, and general industry.
The following may be symptoms of fecal impaction: 1  Being unable to have a bowel movement. 2  Having to push harder to have a bowel movement of small amounts of hard, dry stool. 3  Having fewer than the usual number of bowel movements.  Having pain in the back or abdomen.
Symptoms of a Bowel Obstruction. The first symptoms of a bowel obstruction are often pain, nausea or vomiting accompanied by difficulty or inability to pass gas or stool. A more comprehensive list of bowel obstruction symptoms include: Pain or tenderness around or just below the belly button. Stomach cramps that come and go. Swelling or bloating of the stomach (distention) Constipation and the inability to pass gas (sign of complete blockage) Diarrhea (if bowel is partially blocked)