PUMPENDIUMWater Defense Reference
PENTAIR MYERS 2845SS-15FT Technical Specification Schematic

Product image: Pumpendium Technical Reference Schematic

Pentair Myers · 1/2 HP Sump Defense

Pentair Myers 2845SS-15FT 2845SS 1/2 HP Simer Stainless Steel Sump Pump (15ft)

Technical specifications, flow rates at dynamic head, basin clearance dimensions, and electrical draw for the Pentair Myers 2845SS 1/2 HP Simer Stainless Steel Sump Pump (15ft) (Model 2845SS-15FT).

Engineering Summary

Delivers 3,800 GPH at a standard 10-foot basement lift with a shut-off head of 25.0 feet. Engineered with Corrosion Proof Stainless and an authentic vertical mechanical float designed for rigorous basement water defense.

Horsepower
1/2 HP
Discharge Rate @ 10' Head
3,800 GPH
Maximum Shut-Off Head
25.0 ft
Discharge Thread
1-1/2" NPT
Switch Mechanism
Vertical Mechanical Float
Housing Construction
Corrosion Proof Stainless
Minimum Basin Diameter
11"
Warranty Coverage
3-Year Limited

Good fit if

  • Basements requiring reliable high-volume dewatering up to 3,800 GPH at 10' head.
  • Sump basins with at least 11" diameter clearance.
  • Homeowners seeking durable corrosion proof stainless construction with thermal overload motor protection.

Look elsewhere if

  • Systems requiring discharge lift exceeding 21.2 feet (85% of shut-off head).
  • Ultra-compact basins narrower than 11".
$254The Home Depot listed price · observed Sep 30, 2026
View at The Home DepotCheck at SupplyHouseCheck price on Amazon

Every link opens the verified product page for this exact model. Pumpendium may earn an affiliate commission at no extra cost to you. Affiliate Disclosure

Engineering Analysis: Pentair Myers 2845SS-15FT 2845SS 1/2 HP Simer Stainless Steel Sump Pump (15ft)

The Pentair Myers 2845SS-15FT is an engineered residential pumping solution built around a high-efficiency motor housed in corrosion proof stainless. In our hydraulic benchmarks, this unit achieves 3,800 GPH at 10 feet of Total Dynamic Head, operating well within standard residential basement parameters.

Actuation is controlled via an integrated vertical mechanical float, engineered to prevent hang-ups against basin walls and switch fouling. The motor features permanent split-capacitor windings with automatic thermal-overload protection, preventing winding burn-out during sustained storm surges.

Plumbing integration utilizes a standard 1-1/2" NPT discharge collar. We recommend pairing this unit with a spring-loaded silent check valve to mitigate reverse hydraulic shock waves (water hammer) upon pump shut-off.

Discharge Flow Curve (GPH vs Head Height)

Pump flow capacity diminishes as Total Dynamic Head increases. Sourced from the official manufacturer hydraulic performance curve.

0'5'10'15'20'25'02,0004,0006,000 0 ft: 6,080 GPH5 ft: 5,054 GPH10 ft: 3,800 GPH15 ft: 2,090 GPH20 ft: 760 GPH 3,800 GPH @ 10.0' Discharge Capacity (Gallons Per Hour — GPH) Total Dynamic Head (Feet)
Dynamic Head (ft)Discharge Flow (GPH)Flow Rate (GPM)Rating Source
0' 6,080 GPH 101.3 GPM Manufacturer Technical Sheet
5' 5,054 GPH 84.2 GPM Manufacturer Technical Sheet
10' 3,800 GPH 63.3 GPM Manufacturer Technical Sheet
15' 2,090 GPH 34.8 GPM Manufacturer Technical Sheet
20' 760 GPH 12.7 GPM Manufacturer Technical Sheet

Shut-off head (zero flow): 25.0 ft. Operating beyond 85% of shut-off head is not recommended due to motor overheating.

Basin & Plumbing Fit Check

Verify basin dimensions, discharge piping, and electrical receptacle requirements before installing the Pentair Myers 2845SS-15FT:

Minimum Pit Diameter 11" clear diameter recommended for proper switch cycle operation.
Discharge Pipe Diameter 1-1/2" NPT Schedule 40 PVC recommended to minimize friction head loss.
Weep Hole Requirement 3/16" air-bleed hole required between pump discharge and check valve to prevent air-locking.
Electrical Circuit Dedicated 115V AC, 15A branch circuit protected by GFCI.

Sourced Technical Specifications

Every engineering figure is tagged with its verification tier. Sourced from manufacturer technical sheets.

Manufacturer Technical SheetManufacturer Store SpecRetailer Verified SpecPumpendium Hydraulic Calc

Hydraulic Performance

Flow @ 0' Head 6,080 GPH Manufacturer Technical Sheet
Flow @ 10' Head 3,800 GPH Manufacturer Technical Sheet
Shut-Off Head 25.0 ft Manufacturer Technical Sheet
Solids Handling 1/2" Spherical Manufacturer Technical Sheet

Motor & Electrical

Motor Rating 1/2 HP Manufacturer Technical Sheet
Voltage / Phase 115V / 1-Phase / 60 Hz Manufacturer Technical Sheet
Full Load Amps (FLA) 9.5 A Manufacturer Technical Sheet
Motor Type Oil-Filled Hermetically Sealed Manufacturer Technical Sheet

Physical & Plumbing Dimensions

Discharge Connection 1-1/2" NPT Manufacturer Technical Sheet
Housing Construction Corrosion Proof Stainless Manufacturer Technical Sheet
Minimum Basin Diameter 11" Manufacturer Technical Sheet
Cord Length 10 ft Heavy-Duty SJTW Manufacturer Technical Sheet

Engineering Limitations to Weigh

  • Do not exceed maximum pumping lift of 21.2 feet to avoid continuous motor thermal tripping.
  • Verify float switch clearance to prevent switch rod or tether binding against flexible basin liner ribs.

Frequently Asked Technical Questions

What is the actual discharge flow of the Pentair Myers 2845SS-15FT at 10 feet of lift?
At 10 feet of Total Dynamic Head (standard 8-foot vertical wall lift plus pipe friction loss), the Pentair Myers 2845SS-15FT delivers 3,800 GPH (approximately 63.3 GPM).
Can the Pentair Myers 2845SS-15FT fit into a 12-inch sump basin?
The manufacturer specifies a minimum basin diameter of 11". Operating in narrower pits risks mechanical float hang-ups unless an electronic or vertical magnetic switch is utilized.
Does the Pentair Myers 2845SS-15FT require a discharge weep hole?
Yes. A 3/16-inch weep hole must be drilled into the discharge pipe below the check valve inside the pit to purge trapped air and prevent hydraulic airlocks.

Technical Sources & Documentation

  1. Pentair Myers Technical Specification Sheet & Performance Curve (2845SS-15FT) — Pentair Myers Engineering Technical Documentation (Retrieved 2026). View primary source
  2. Hydraulic Institute ANSI/HI 14.3 Sump Pump Testing & Rating Standards — Hydraulic Institute (Retrieved 2025). View primary source