WHAT ARE THE ADVANTAGES AND DISADVANTAGES OF PERISTALTIC VERSUS DIAPHRAGM PUMP (APPROX 2 IN SIZE)TO MOVE CEMENT/SAND SLURRY? PERISTALTIC PUMP MANUFACTURERS CLAIM LOWER MAINTENANCE AND VULNERABILITY OF DIAGPHRAGM BALL VALVE - YET OPERATION WITH ABRASIVES WEARS HOSE. DIAPHRAGM MANUFACTURERS...