Non-Submersible Wastewater Pumps

Dry-pit installations offering superior maintenance access, higher efficiency, and longer service life for municipal and industrial wastewater applications.

Non-Submersible Pump Technology

Non-submersible wastewater pumps are installed in dry locations such as pump stations, equipment rooms, or above-ground installations. These pumps offer distinct advantages for large-scale applications where maintenance accessibility, energy efficiency, and long service life are priorities.

With separate motor and pump components, non-submersible pumps provide flexibility in configuration and typically achieve higher efficiency ratings than submersible alternatives. The dry installation environment protects motors from moisture and corrosive atmospheres while enabling easier inspection and maintenance procedures.

Superior Efficiency

Achieve 80-88% efficiency with optimized hydraulic designs and flexible motor configurations.

Easy Maintenance

Direct access to all components without lifting equipment or wet well entry.

Long Service Life

Motor protection from moisture and corrosive environments extends equipment lifespan.

High Capacity

Handle large flows up to 10,000+ GPM for major municipal and industrial applications.

Types of Non-Submersible Wastewater Pumps

Advantages of Non-Submersible Pumps

Performance Benefits

  • Higher Efficiency: 80-88% efficiency vs 75-82% for submersible pumps
  • Greater Capacity: Handle flows up to 10,000+ GPM
  • Better NPSH Characteristics: Optimized suction designs
  • Variable Speed Ready: Easy VFD integration for efficiency

Maintenance Advantages

  • Direct Access: No lifting equipment required for service
  • Visible Operation: Monitor bearings, alignment, and performance
  • Standard Components: Industry-standard motors and drives
  • Predictive Maintenance: Vibration analysis and condition monitoring

Operational Benefits

  • Motor Protection: Dry environment prevents moisture damage
  • Better Heat Dissipation: Air cooling for motor longevity
  • Flexible Configuration: Motor/pump combinations available
  • Emergency Access: Service possible during operation

When to Choose Non-Submersible Pumps

✅ Choose Non-Submersible When:

  • High efficiency requirements (>85%)
  • Large flow rates (>1,000 GPM)
  • Continuous duty operation
  • Easy maintenance access needed
  • Long-term reliability critical
  • Pump room space available
  • Multiple pump configurations required
  • High head applications (>150 ft)

❌ Consider Alternatives When:

  • Limited above-ground space
  • Low flow applications (<200 GPM)
  • Intermittent duty cycles
  • Initial cost is primary concern
  • Noise restrictions apply
  • Wet well installation preferred
  • Simple operation required
  • Freezing conditions possible

Installation Considerations

Foundation Requirements

  • Concrete foundation sized for pump and motor weight
  • Vibration isolation if required
  • Proper drainage around equipment
  • Level and aligned mounting surfaces

Building Requirements

  • Weather protection for outdoor installations
  • Adequate ventilation for motor cooling
  • Crane or lifting provisions for maintenance
  • Emergency access and egress

Piping Design

  • Suction piping design critical for performance
  • Avoid cavitation with proper NPSH design
  • Support all piping independently
  • Include isolation and check valves

Electrical Requirements

  • Motor starter and disconnect switches
  • Variable frequency drives if applicable
  • Control panels and instrumentation
  • Emergency shutdown systems