One municipality keeps detailed records on all repair and maintenance work orders and costs for its 53 pump stations, some submersible and some S&L Wet Well Mounted. A 12-year study of the data revealed nearly 56 percent lower operating expenses for the S&L stations compared to submersibles—a differential of nearly 30 labor hours and $2,750 per station per year!
The Unified Government of Wyandotte County and Kansas City, Kan. has kept detailed records of all repair and maintenance work orders for the 32 S&L Wet Well Mounted Pump Stations (WWMPS) and 21 submersible pump stations in its sewerage network for more than a decade. This includes all labor hours and costs, outside contractor expense, parts costs and total expenditures for these stations.
Total Cost Comparison Results
The results overwhelmingly favor the S&L Wet Well Mounted Pump Station approach with nearly 56% in total cost savings, an average of more than $2,700 per pump station per year (nearly $400,000 saved by the city over a 12-year period).
Preventative vs. Corrective Maintenance Hours
Contrary to popular belief, submersibles require a significant amount of preventative maintenance, as illustrated below.
Request the full study for complete data for all 53 pump stations surveyed in the comparison, including actual pumping conditions, efficiency ratings, pump station age, and all accumulated repair and maintenance costs per pump station.