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.
Fecal impaction may cause more than just back pain constipation. Sometimes, the impaction causes near-constant cramping and pain in the rectum. Plus, when attempting to make a bowel movement, a person may feel severe abdominal pains that make it all but impossible to successfully defecate.