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 impaction. The symptoms of impaction are similar to the symptoms of constipation. But other more serious symptoms can occur. These include. 1  Back pain due to the mass of poo pressing on the nerves in your lower back (sacral nerves). 2  A swollen tummy (abdomen). 3  High or low blood pressure. 4  A rapid heart rate. 5  Dizziness. 6  Sweating.