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 fecal impaction include: 1  Liquid stool (the stool is leaking around the impacted mass of feces and can be mistaken for diarrhea) 2  Abdominal pain, especially after meals. 3  A persistent urge to move the bowels. 4  Nausea and vomiting. 5  Headache. 6  Poor appetite, weight loss. 7  Malaise (a generally sick feeling)