✅ This item is normally regularly stocked. Shipping times may vary depending on availability. Please contact us to confirm stock and shipping times. You will receive tracking details once the item has shipped.
Description
Compact UL-Listed Duplex Pump Control Panel With Alternating Control and Override for Residential Sewage and Water Installations
When two pumps need to share the load, the SJE NEX Series duplex pump control panel handles it. The compact 10" x 8" x 4" NEMA 4X panel alternates two 120/208/240V single-phase pumps to equalize wear, runs override if either pump fails, and triggers an audible/visual alarm at high level.
Quick Specs
- Application: Duplex (two-pump alternating with override)
- Voltage: 120 / 208 / 240V single phase, 50/60 Hz
- Amperage: 0–12 amps or 9–20 amps (model-dependent)
- Enclosure: 10" x 8" x 4" NEMA 4X UV-stabilized thermoplastic
- Float Control Voltage: 12 VDC
- Alarm Horn: 85–90 dB
- Auxiliary Alarm Contacts: Form C, 5 amp, 120 VAC max
- Certification: UL / cUL Listed
- Warranty: 5-Year Limited
Key Features of the SJE NEX Series Duplex Pump Control Panel
- Alternating pump control equalizes wear across two pumps, so neither runs as the dedicated lead.
- Override control activates the second pump. If either pump fails, the system keeps moving liquid even with a single-pump fault.
- Universal 120/208/240V single-phase compatibility lets one panel cover three voltage configurations without separate SKUs.
- NEMA 4X UV-stabilized thermoplastic enclosure withstands moisture, dust, corrosion, and outdoor sun exposure for indoor or outdoor mounting.
- HOA (Hand-Off-Auto) switches per pump for manual test, bypass, or shutdown when troubleshooting float behavior.
- Standard alarm package: red 360° beacon, 85–90 dB horn, exterior test/silence push button auto-resets after high-level condition clears.
- Auxiliary alarm contacts (Form C, 5A at 120 VAC max) signal external monitoring devices for remote notification.
- Operates with three or four float switches (Stop, Lead, Lag, Alarm), three-float and four-float package options ship from the factory with 20-ft SJE SignalMaster control switches.
- Padlockable latch and integral mounting feet keep installation fast, and the enclosure secured against tampering.
- Optional Elapsed Time Meter (ETM) variants log individual pump run-time in hours for maintenance scheduling.
SJE NEX Duplex Pump Control Panel Specifications
| Specification | Details |
|---|---|
| Brand | SJE Rhombus |
| Series | NEX Series® |
| Application | Duplex — two-pump alternating with override |
| Pump Voltage | 120 / 208 / 240V single phase, 50/60 Hz |
| Control / Alarm Voltage | 120 / 208 / 240V single phase, 50/60 Hz |
| Pump Amperage | 0–12 amps or 9–20 amps |
| Float Control Voltage | 12 VDC |
| Float Configuration | Three or four floats (Stop, Lead, Lag, Alarm) |
| Enclosure Dimensions | 10" x 8" x 4" (25 x 20 x 10 cm) |
| Enclosure Type | Padlockable NEMA 4X, UV-stabilized thermoplastic |
| Mounting | Indoor or outdoor |
| Alarm Beacon | Red LED, 360° visual |
| Alarm Horn | 85–90 dB |
| Auxiliary Alarm Contacts | Form C, 5 amp, 120 VAC max |
| HOA Switches | Hand-Off-Auto, one per pump |
| Indicator Lights | Pump run, control/alarm power, float status |
| Circuit Protection | Thermal-magnetic breaker per pump + control/alarm fuses |
| Optional | Elapsed Time Meter (ETM) variants |
| Certification | UL / cUL Listed |
| Patent | U.S. Patent No. 10,251,284 |
| Warranty | 5-Year Limited |
Performance Overview
Stop and Lead floats run the lead pump on demand. If the level keeps rising, the Lag float starts the second pump. The Alarm float triggers visual and audible alerts.
Construction & Internal Components
| Component | Details |
|---|---|
| Enclosure | UV-stabilized thermoplastic, NEMA 4X, hinged door |
| Mounting | Integral mounting feet; padlockable latch |
| Pump Circuit Protection | Two thermal-magnetic circuit breakers (one per pump) |
| Power Relays | Two relays — alternate between pumps |
| Control Logic | PCB-based alternator with override on pump fail |
| Control / Alarm Protection | Separately fused control and alarm circuits |
| HOA Switches | Two PCB-mounted Hand-Off-Auto selectors |
| Indicators | Pump run (×2), power, float status, alarm beacon |
| Alarm System | LED beacon (360°), 85–90 dB horn, test/silence button, Form C contacts |
| Field Wiring | Terminal block; ground lug provided |
| Optional | Elapsed Time Meter — logs run-time per pump |
Applications
- Residential septic systems with two submersible effluent pumps
- Sewage and effluent pump installations needing redundancy and load balancing
- Two-pump lift stations in low-flow service areas where pump rotation is required
- Larger residential or light-commercial sumps with high-volume cycling
- Replacement controller for failed direct-wire two-pump installs needing alternation and override
Why Choose the SJE NEX Series Duplex Pump Control Panel?
The NEX Series duplex panel keeps two residential pumps cycling evenly, with override protection if one pump fails. The layout most installers and inspectors expect on duplex septic and sewage systems.
Pairs Well With
Single-pump installation? Take a look at the SJE NEX Series simplex pump control panel, same enclosure family and alarm package, sized for a single-pump system.
For high-water alerting on tanks not paired with a pump, browse the tank alarm systems collection.
Buy SJE NEX Series Duplex Pump Control Panels Online from Cleanflow
Cleanflow stocks the SJE NEX Series duplex pump control panel in panel-only, three-float, and four-float configurations, and ships across Canada and the USA. Add to cart, or contact the Cleanflow team to confirm amperage range and float configuration for your install.
What does a duplex pump control panel do?
A duplex panel runs two pumps from a single controller. It alternates which pump runs first to balance wear, brings in the second pump when the liquid level reaches the lag float, and triggers an alarm if the level keeps rising. If one pump fails, the override puts the working pump on duty.
How many float switches does the NEX Series duplex panel use?
Three or four. A three-float setup uses Stop, Lead/Lag (combined), and Alarm. A four-float setup uses Stop, Lead, Lag, and Alarm separately. Cleanflow's SKU options ship as panel-only, with three 20-ft SJE SignalMaster floats, or with four 20-ft floats.
What voltages does the NEX Series duplex panel support?
It handles 120V, 208V, and 240V single-phase power on the same panel. There is no need to spec a separate model per voltage. Both pump power and control/alarm power use the same 120/208/240V single-phase, 50/60 Hz feed.
What is override control, and when does it activate?
If either pump fails to run when called, the panel's override logic activates the working pump to keep liquid moving. The system was designed so that a single pump fault doesn't stop pumping useful for residential sewage, where a flooded basement is the alternative.
Can the panel be installed outdoors?
Yes. The NEMA 4X UV-stabilized thermoplastic enclosure is rated for indoor or outdoor mounting and resists corrosion, windblown dust, rain, and hose-directed water. Use proper conduit sealing to keep gas and moisture out.
What is the difference between this and the NEX Series simplex panel?
The simplex panel runs one pump. The duplex panel runs two pumps with alternating control and override. If you only have one pump, choose simplex; if you have two pumps and need redundancy or load balancing, choose duplex.
Does the panel come with an Elapsed Time Meter (ETM)?
ETM is optional. ETM-equipped variants log individual run-time per pump in hours, which is useful for predictive maintenance and pump-warranty tracking. Standard variants don't include ETMs. Confirm the part number when ordering.
What is the warranty?
SJE Rhombus backs the NEX Series duplex panel with a 5-Year Limited Warranty. Warranty is void if the panel is modified. Installation must follow the included instructions and applicable electrical codes (NFPA-70, provincial, and local) by a licensed electrician.
Manuals & Documentation
✅ This item is normally regularly stocked. Shipping times may vary depending on availability. Please contact us to confirm stock and shipping times. You will receive tracking details once the item has shipped.
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