Franklin Electric Duplex Grinder Pump System, 2 HP

The Franklin Electric Duplex Grinder Pump System is a packaged, automatic sewage pumping station built around two 2 HP IGP grinder pumps, a 36-inch-diameter fiberglass basin and a duplex control panel. It is designed for residential and light-commercial low-pressure sewer applications where dependable wastewater transfer and dual-pump operation are needed. Ken’s Distributing Company supplies the IGP-DPLX3648, IGP-DPLX3660 and IGP-DPLX3672 packages and can help confirm the right basin depth, electrical requirements, replacement components, price and availability.

At a glance: two 2 HP pumps; 230V single-phase power; 13.9 full-load amps per pump; 1-1/4-inch pump discharge; 4-inch basin inlet; 48-, 60- or 72-inch cataloged complete packages; four control floats; and separate access to IGP pumps and service components. Share your incoming sewer-pipe elevation, force-main size and length, required flow and total dynamic head for a correctly sized quotation. We reply within one business day.

For a single-pump station, or to compare basin sizes, see our Franklin packaged grinder systems.

Franklin Electric Duplex Grinder Pump System Specifications

The IGP duplex package uses two motor-driven grinding pumps in one wet well. Its automatic controls manage pump operation through level floats; the actual capacity depends on the operating point and control configuration. The manufacturer’s performance figures below describe an individual IGP pump, not a guaranteed combined flow from both pumps.

Duplex Grinder Pump Models and Ordering Numbers

All three manufacturer order numbers below are complete 36-inch-diameter fiberglass grinder-pump packages. The suffix identifies basin depth, not a different pump horsepower. The 48-inch package has a different discharge-centerline location from the taller units, so check the existing piping and incoming sewer elevation before ordering.

Choosing basin depth: Match the inlet invert elevation, working storage volume, pump-off level, high-water alarm elevation and local installation requirements. An 84-inch basin and deeper basin-only configurations are listed in Franklin Electric’s separate basin catalog, not as complete IGP-DPLX packages.

IGP Grinder Pump Performance Curve: GPM at Total Head

Use the following manufacturer IGP performance points when checking one pump against the system’s required total dynamic head. These values do not mean a duplex package always provides twice the listed flow: concurrent operation, shared discharge piping, head loss and the panel’s control logic determine system performance.

The IGP pump has a published shutoff head of approximately 130 feet. For sizing, calculate static lift plus force-main friction losses and check velocity, cycle frequency and available pump capacity at the actual operating point. For applications requiring more head, compare a high-head grinder pump and its specified control package rather than assuming a standard IGP duplex station meets the requirement.

What Comes with the Duplex Grinder Pump Package?

Two IGP Series Grinder Pumps

Each 2 HP grinder pump uses a high-starting-torque, 3,450 RPM motor and a cast-iron body with an epoxy-coated finish. A balanced brass impeller moves the sewage after hardened cutters reduce solids to a pumpable slurry. Two pumps provide operational flexibility in systems requiring alternating duty or supplementary pumping during increased inflow.

36-Inch Fiberglass Wet Well and Access Hardware

The fiberglass basin uses a 4-inch inlet grommet and a solid fiberglass cover. Stainless-steel guide rails, sealing flange and lifting chains support access to the pump equipment. Select the basin depth for actual site elevations and local wet-well storage requirements rather than floor count or number of bedrooms alone.

Duplex Control Panel, Four Floats and Check Valves

The package includes a duplex control panel with pump starting components, four control float switches, a float bracket, junction box and two cast-iron ball check valves. Level controls can support alternating duty and high-water response when configured correctly. Confirm alarm outputs, lead-lag settings and simultaneous-run requirements with the selected panel documentation.

Discharge Disconnect and Isolation Hardware

Discharge-pipe disconnects, ball check valves and a shutoff valve provide a serviceable discharge arrangement. These components help isolate the wet well and remove a pump for service, subject to the installed rail and valve arrangement.

Franklin Electric OEM System Components and Replacement Numbers

If the basin, controls or one grinder pump needs service, identify the existing package by its IGP-DPLX model and six-digit item number. Franklin Electric also publishes component references for the underlying IGP package. The entries below are manufacturer catalog references, not a guarantee that every item is sold separately or stocked today.

IGP Grinder Pump Service Accessories and Hardware

The following OEM parts are in Franklin Electric’s grinder-pump accessory catalog. They may support replacement or repair projects, but exact fit with an installed IGP-DPLX system must be checked before ordering.

For replacement IGP impellers, rotating cutters, stationary cutters, mechanical seals, power cords or repair kits, send the original pump nameplate and any component identifiers. Internal part numbers for these duplex assemblies are not in the manufacturer package catalog, so we confirm them from your nameplate before ordering.

When Should You Repair the Station or Replace the Complete Package?

• Replace one failed pump: When the basin and controls remain serviceable, confirm whether the existing IGP-M231-15 pump and discharge connection can be retained with an OEM replacement.
• Service the control equipment: Float-switch failures, damaged cable connections or control-panel faults may need component-level repair without replacing the fiberglass basin.
• Replace the entire duplex station: A damaged wet well, obsolete wiring, changed incoming sewer elevation or substantially different system duty may justify specifying a new package.
• Consider more discharge head: If measured system head exceeds the standard IGP’s performance range, compare the properly engineered higher-head package instead of replacing parts alone.

Duplex vs. Simplex Grinder Pump Systems

The right arrangement depends on wastewater inflow, total dynamic head, force-main design and the consequences of a service interruption. The duplex arrangement improves flexibility but does not replace proper pump sizing, high-water alarming or planned maintenance.

Applications for Duplex Grinder Pump Stations

• Residential low-pressure sewer systems: Homes or clustered properties where wastewater must be pumped to a higher or more distant sewer connection.
• Light-commercial sewage transfer: Offices, small commercial buildings and shared facilities requiring a wet well with two pumps.
• Multi-unit residential developments: Townhome and apartment applications where a single-pump station does not meet the specified operating arrangement.
• Homeowner associations and managed systems: Shared pump stations where monitoring, service access and planned pump alternation matter.
• Remote or elevated discharge locations: Sewage force mains where static lift and friction loss require careful operating-point selection.

Installation Information for Contractors and Facilities Teams

For a new duplex grinder pump installation, verify the basin excavation and backfill design, groundwater conditions, incoming sewer invert, four-inch inlet position, force-main head loss, ventilation, lifting access and suitable discharge piping. Electrical requirements include 230V single-phase power, 13.9 A full-load current per pump and a correctly sized panel and circuit for the intended operating sequence. Complete wiring and commissioning must follow the approved installation instructions and applicable local requirements.

Quote the complete system: Provide the intended package model or item number, site location, basin depth, proposed inlet invert, force-main length and diameter, static elevation change, number of connected fixtures or expected wastewater loading, and available electrical service. We will confirm pump selection, configuration, price and availability.

Quote replacement parts: Provide the IGP-DPLX assembly number, the installed IGP pump nameplate, a photograph or part reference, and whether you need a grinder pump, control panel, float switch, valve, basin, rail hardware or internal pump component. Ask for the manufacturer-correct part rather than assuming that components from another grinder series are interchangeable. Request price and availability from Ken’s Distributing Company, or call 303-699-7845. We serve customers across the United States and Canada.

Frequently Asked Questions About Franklin Electric Duplex Grinder Pumps

What comes with a Franklin Electric duplex grinder pump system?

The listed IGP-DPLX packages include two 2 HP grinder pumps, a 36-inch fiberglass wet well and cover, duplex pump controls, four floats, check valves, discharge disconnect hardware, guide rails and lifting chains. The manufacturer describes the system as pre-packaged, with installation and assembly required.

How do I choose between IGP-DPLX3648, IGP-DPLX3660 and IGP-DPLX3672?

They share the same published pump electrical ratings but have basin depths of 48, 60 and 72 inches. Select the package using the incoming sewer elevation and system storage requirements. The 48-inch unit also differs in its discharge centerline location.

Does the duplex system deliver 64 GPM because it has two 32 GPM pumps?

Not necessarily. The 32 GPM reference is a single IGP pump’s flow at 20 feet of head. Combined flow depends on whether both pumps operate, the shared force main and the resulting system head. Use a complete hydraulic calculation for simultaneous operation.

Can the second pump take over if the first one fails?

A properly configured duplex controller can make another pump available when wastewater level rises or duty is switched, but the actual response depends on the panel and fault. A duplex system is not a guarantee against all electrical, control or blockage failures.

What is the maximum head of the standard IGP grinder pump?

The published IGP curve has approximately 130 feet of shutoff head and delivers 20 GPM at 100 feet of head. Pump selection should use required flow at total dynamic head, not shutoff head alone.

What is the difference between IGP and high-head IGPH grinder pumps?

IGP is the standard grinder pump family used in the listed duplex packages. IGPH is a different high-head grinder pump family for applications requiring more head. Substitution requires confirmation of the pump, controls, discharge assembly and system duty.

Can I buy just an IGP replacement pump or control panel?

Franklin publishes individual IGP pump and duplex control-panel references, including 515864 for IGP-M231-15 and 515355 for the 1026540 panel. Supply your installed model and electrical information so Ken’s Distributing Company can check the correct replacement and availability.

Are deeper basins available?

Franklin’s basin catalog includes 84-, 96-, 108- and 120-inch basin-only item numbers. These are not additional complete IGP-DPLX pump-package order numbers on the standard manufacturer ordering table. Request a configuration review for deeper applications.

Related Franklin Electric Grinder Pumps, Controls and Parts

• Franklin Electric Simplex Grinder Pump System for single-pump packaged wastewater stations.
• Franklin Electric IGP Series Grinder Pump for individual pump models and replacement planning.
• Franklin Electric Duplex Grinder Pump Control Panels for alternating pump controls and alarm requirements.
• Franklin Electric High-Head IGP Series Grinder Pump for greater total dynamic head applications.
• Franklin Electric Grinder Pump Retrofit Kit for eligible existing wet-well conversions.
• Franklin Electric Replacement Parts for wider repair and service requests.