1) Reducing the clearance between pump wear rings reduces internal fluid leakage, saving energy for a given process flow rate. 2) Published data shows significant energy savings from reduced wear ring clearance across a range of pump sizes and types. 3) Estimates indicate the cost of upgrading pumps with composite wear rings that allow for reduced clearance is paid back within 1-3 years through energy savings, with a greater payback for larger, higher power pumps.