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.
Signs and Symptoms of an Impacted Colon. Because pressure is being placed on your abdomen, impaction can cause a loss of appetite. You will gain weight because the waste accumulates in your body and it has nowhere to go. When and if you decide to use a colon cleanser, you might lose several pounds.