These hoses, made for us by the experts, are a combination of outer fabric reinforced shells with inner “rubber” walls that have a tremendous “memory”. This memory causes the hose to spring back to a round shape. As the hose returns to round the suction draws in the concrete for the next squeeze roller to push it through.
note: To add life to the pump line, it should be lubricated on the outside as needed using either silicone or Armorall Tire Foam.
