Datasheet summary
ST.E.P. Plus 4" Multistage Submersible Pumps
PDF datasheet mirror for ST.E.P. Plus 4" Multistage Submersible Pumps (Pentair STA-RITE). Verify with OEM before design.
Summary
Product identification
- Product Line: ST.E.P. Plus D Series
- Type: 4" multi-stage submersible effluent pumps
- Document Reference: S11410WS
- Models: Available in 10, 20, and 30 GPM nominal flow rate versions.
Applications
- Clean and Gray Water for residential, commercial, and agricultural use.
Operating limits
- Minimum Draw-down: 4-1/2” (compared to 13-1/2” for a standard 4” NEMA submersible).
- Solids Handling: Allows for .080” solids.
Electrical
- Motor:
- Dry-wound, double ball-bearing, double-seal.
- Thermal overload protected.
- UL and CSA approved.
- Available in 115 or 230 volt versions.
- Cord: 300 Volt “SJOW” jacketed 10’ leads, 2-wire with ground.
- Energy Efficiency: Reduced amp draw, over 25% less amp draw (e.g., 9.5 amps vs. 12.7 amps for 115 volt models) compared to a standard 4” NEMA submersible.
Mechanical / hydraulic
- Pump Type: 4” multi-stage submersible effluent pump.
- Outer Diameter: 3.86" (98 mm).
- Discharge: 1-1/4” Fiberglass-reinforced thermoplastic.
- Shell: 300-grade stainless steel.
- Shaft and Coupling: 300-grade stainless steel, hexagonal 7/16” positive drive shaft.
- Intake: Fiberglass-reinforced thermoplastic.
- Intake Screen: Stainless steel.
- Impellers: Precision molded Acetal.
- Diffusers: Polycarbonate.
- Suction Caps: Polycarbonate with stainless steel wear ring.
- Discharge Bearing: Nylatron®.
- Shaft Bearing: Self-lubricating Nylatron® bearing, resistant to sand and abrasives.
- Depth Adjustment: Pump depth can be adjusted with standard 3” PVC pipe fitted to the bottom of the intake.
Key Features
- Proven Stage System: SignaSeal staging system with patented ceramic wear surface and "true" independent floating impellers for superior sand handling and thrust management.
- Dry-Run Capability: Industry exclusive dry-run capabilities.
- Cooler and Quieter Operation: Uses pumped liquid for motor cooling and noise dampening, eliminating the need for flow-inducer sleeves.
Ordering Information and Dimensions
| Catalog Number | HP | Max. Load Amps | Volts | Phase/Cycles | Cord Length | Pallet Quantity | Weight (Lbs.) | Pump Length |
|---|---|---|---|---|---|---|---|---|
| 10DOM05121 | 1/2 | 11.0 | 115 | 1/60 | 10’ | 40 | 17 | 21.6 |
| 10DOM05221 | 1/2 | 5.5 | 230 | 1/60 | 10’ | 40 | 17 | 21.6 |
| 20DOM05121+1 | 1/2 | 10.6 | 115 | 1/60 | 10’ | 40 | 17 | 22.3 |
| 20DOM05221+1 | 1/2 | 5.3 | 230 | 1/60 | 10’ | 40 | 17 | 22.3 |
| 30DOM05121 | 1/2 | 9.5 | 115 | 1/60 | 10’ | 40 | 19 | 20.6 |
| 30DOM05221 | 1/2 | 4.6 | 230 | 1/60 | 10’ | 40 | 19 | 20.6 |
| 20DOM07221 | 3/4 | 6.5 | 230 | 1/60 | 10’ | 40 | 19 | 24.9 |
| 30DOM07221 | 3/4 | 5.6 | 230 | 1/60 | 10’ | 40 | 18 | 22.3 |
| 30DOM10221 | 1 | 7 | 230 | 1/60 | 10’ | 40 | 22 | 24.6 |
Pump Performance (Total Head in Feet at various Capacities)
The following table provides selected performance points for different pump models.
| HP | Nominal Flow Rate (GPM) | Capacity (GPM) | Total Head (Feet) |
|---|---|---|---|
| 1/2 | 10 | 20 | 15.0 |
| 1/2 | 10 | 40 | 1.0 |
| 1/2 | 20 | 20 | 30.0 |
| 1/2 | 20 | 30 | 6.0 |
| 3/4 | 20 | 20 | 29.5 |
| 3/4 | 20 | 40 | 5.0 |
| 1/2 | 30 | 10 | 38.5 |
| 1/2 | 30 | 30 | 25.8 |
| 3/4 | 30 | 10 | 38.1 |
| 3/4 | 30 | 40 | 23.7 |
| 1 | 30 | 10 | 39.1 |
| 1 | 30 | 70 | 11.1 |
Note: For comprehensive performance data, including full curves and additional points, please refer to the official PDF datasheet.
Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions from the official OEM PDF. Contractual data must always match the specific OEM PDF revision used on the project.
Official datasheet (PDF)
Curated from selected public technical reference material for discovery and preliminary comparison. This summary is not a substitute for a current certified manufacturer datasheet. Verify revisions and design limits before use.