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The EDDY Pump 4-Inch Subdredge is a compact, remote-operated dredging ROV engineered for precision material removal in confined, hazardous, or liner-sensitive environments. Delivering up to 1,000 GPM, handling solids up to 3 inches in diameter, and pumping 40–70% solids by volume, it achieves production rates of 75–150 cubic yards per hour. With fully remote control, real-time sensor feedback, operating depths up to 40 ft, and a pump head capacity of 160 ft, it offers unmatched safety and versatility for small- to mid-scale dredging operations.
Uncrewed Operation – Safely dredge hazardous or hard-to-access sites without exposing personnel. High Solids Handling – Moves up to 70% solids by volume, including sludge, slurry, tailings, and sand. Liner-Safe Mobility – Rubber tracks allow safe dredging over clay, poly, or concrete liners. Versatile Dredging Heads – Switch between cutterhead and non-clog pump heads for different material types. Compact & Precise – Smaller footprint enables operation beneath structures, docks, or inside lagoons. Real-Time Monitoring – Integrated sensors for pressure, depth, swing angle, and vessel orientation. Redundant Control Systems – Wireless handheld remote with ruggedized laptop backup. Global Remote Access – Internet-enabled monitoring and operation from virtually anywhere.
See the 4-Inch Subdredge – Remote Operated Submersible Dredge (ROV) in Action
Flow Capacity: 250 – 1,000 GPM Head Range: Up to 160 ft Production Rate: 75 – 150 cubic yards per hour Percent Solids by Volume: Up to 40–70% Max Speed: 1,800 RPM Ground Pressure: ~3.3 PSI Max Horsepower: 100 HP
Discharge Size: 4 in Suction Size: 6 in Maximum Solids Size: Up to 3 in Rotor Size: 12 in Pump Case Material: 28% Chrome Iron Fluid Types: Sludge, slurry, mine tailings, sand mixtures
Double Mechanical Seal: Tungsten Carbide Faces Pumping Ring: Maintains Excellent Flow Through Seal Run Dry Capability:Unlimited Barrier Fluid Cooled: 50/50 Water/ Propylene Glycol Pressurized: 25-35 Psi Tank Volume: 2.5 Gallons Tank Construction: 316 Stainless Steel
Hull Water Intrusion Sensor: With topside audible and visual alarm Depth & Hydraulic Pressure Sensors: Includes tank line and swing angle sensors Vessel Orientation Sensor: Magnetic heading, pitch, roll, and temperature monitoring Cameras & Lighting: Optional dual low-light cameras with LED lighting GPS Buoy Positioning: Constant-tension buoy enables operation up to 40 ft depth
Wireless Controller: Handheld remote with live redundant control Backup System: Ruggedized laptop with application-specific control software Safety Feature: Pneumatic lift bags for emergency retrieval Remote Operation Range: Up to 1,000 ft via umbilical with internet connectivity for global control
Pump Circuit Requirements: 32–35 GPM @ 5,000 PSI (80cc motor) from excavator auxiliary power or hydraulic power unit Cutterhead Circuit Requirements: 12–15 GPM @ 5,000 PSI Subdredge Circuit Requirements: 30–35 GPM @ 5,000 PSI
Acoustic imaging display for turbid water environments Additional lighting or camera systems Magnetometer-type flow meter for production monitoring with USBL acoustic positioning for precise tracking Rotating cutterhead for compacted or hardened materials
A pump curve indicates how the system performs across different flow and head conditions, helping confirm that the Subdredge is configured correctly for demanding slurry environments. For the 4 Inch Subdredge, selecting the appropriate curve ensures stable output, efficient transport of high-solids material, and reliable operation in confined or liner-sensitive areas where precision and consistent performance are essential.
Technical Drawings & Resources
| Specification | 4-Inch Subdredge | 6-Inch Subdredge | 8-Inch Subdredge | 10-Inch Subdredge | 12-Inch Subdredge |
|---|---|---|---|---|---|
| Min Flow (GPM) | 250 | 450 | 800 | 1200 | 2600 |
| Max Flow (GPM) | 1000 | 2500 | 4000 | 5000 | 7300 |
| Max Head (ft) | 160 | 200 | 200 | 200 | 180 |
| Discharge Size | 4 in | 6 in | 8 in | 10 in | 12 in |
| Suction Size | 6 in | 8 in | 10 in | 12 in | 14 in |
| Max Solids Handling | 3 in | 5 in | 7 in | 9 in | 11 in |
| Max Speed (RPM) | 1800 | 1800 | 1800 | 1800 | 900 |
| Solids by Volume | 40–70% | 40–70% | 40–70% | 40–70% | 40–70% |
| Production Rate (yd³/hr) | 75–150 | 150–200 | 250–300 | 300–350 | 500–600 |
| Max Horsepower (HP) | 125 | 250 | 500 | 500 | 1000 |
| Pump Circuit Requirements | 32–35 GPM @ 5000 PSI (80cc) | 75 GPM @ 4000 PSI (180cc) | 130–150 GPM @ 5000 PSI (500cc) | 120–160 GPM @ 5000 PSI (500cc) | 160–200 GPM @ 5000 PSI (750cc) |
| Cutterhead Circuit Requirements | 12–15 GPM @ 5000 PSI | 12–20 GPM @ 5000 PSI | 12–20 GPM @ 5000 PSI | 12–20 GPM @ 5000 PSI | 12–20 GPM @ 5000 PSI |
The 4-Inch Subdredge is ideal for handling abrasive slurries and mine tailings in ponds, basins, and containment areas. Its ability to pump 40–70% solids by volume and safely operate on lined surfaces makes it a reliable tool for material reclamation, tailings management, and sediment removal without damaging liners or infrastructure.
Wastewater treatment plants and industrial facilities often face sludge buildup in treatment lagoons and settling ponds. The Subdredge’s remote, uncrewed operation eliminates the need for confined-space entry, while its compact size enables precise desludging in tight areas. Real-time sensor data ensures accurate removal with minimal downtime and reduced operational risk.
Sand mining operations require efficient handling of abrasive mixtures and continuous removal of settled materials. The 4-Inch Subdredge excels in such conditions, handling solids up to 3 inches and maintaining consistent flow rates. Its non-clog pump head minimizes maintenance interruptions, keeping production on schedule.
Coal-fired power plants and other energy facilities must regularly remove fly ash, bottom ash, and other waste materials from ponds and holding basins. The Subdredge’s remote operation allows safe and efficient dredging in hazardous environments, protecting workers from exposure while meeting environmental compliance requirements.
The compact, liner-safe design of the 4-Inch Subdredge makes it ideal for dredging in restricted marine environments such as beneath docks, piers, ship hulls, and offshore platforms. Its remote control and real-time feedback enable precision sediment removal where conventional dredges cannot operate effectively.
For reservoirs, canals, lined channels, and dam basins, the 4-Inch Subdredge delivers high-precision dredging without compromising liner integrity. Its lightweight, track-mounted platform allows safe operation on delicate surfaces, extending the service life of critical water management infrastructure.
Contaminated ponds, lagoons, and waterways require controlled and precise sediment removal to prevent the release of pollutants. The Subdredge provides an unmanned, safe, and efficient solution that can transport high concentrations of contaminated materials, minimizing the number of passes and reducing overall project costs.
Maintaining navigable depths in port channels and harbor basins is critical for vessel traffic and operations. The 4-Inch Subdredge enables targeted dredging in confined, hard-to-reach areas — including beneath piers and along bulkheads — where larger dredges cannot operate, making it an excellent solution for routine maintenance dredging.
Case Study
A mid-sized municipal wastewater treatment facility was facing severe capacity reduction due to sludge buildup in one of its lined lagoons. Conventional dredging methods required draining the lagoon and deploying manual crews, which would have resulted in costly downtime and potential regulatory non-compliance due to treatment delays. Safety was also a concern due to the confined space and high gas levels within the lagoon.
The municipality deployed the 4-Inch Subdredge to perform remote, unmanned sludge removal while the lagoon remained in operation. Its liner-safe tracks ensured the pond’s protective layer was not damaged, and real-time sensor data allowed operators to precisely target high-accumulation zones without over-dredging. The unit pumped sludge with solids concentrations of up to 70% and solids up to 3 inches in size, significantly reducing the number of passes required.
The project was completed 40% faster than with previous mechanical methods, and operational downtime was reduced to near zero. The lagoon’s treatment capacity was fully restored, compliance deadlines were met, and safety risks were virtually eliminated due to remote operation.
If you need assistance with pump selection, sales or engineering support, call 619-404-1916.
The 4-Inch Subdredge is a remote-operated dredging ROV, designed specifically for hazardous, confined, or liner-sensitive environments where conventional dredges cannot operate efficiently or safely. Unlike traditional dredges that require on-board crews or diver assistance, this ROV is operated entirely from shore or a vessel, significantly improving safety, precision, and uptime while reducing labor costs.
The system is engineered to handle a wide range of abrasive and viscous materials, including sludge, slurry, mine tailings, sand mixtures, and industrial by-products like fly ash or bottom ash. It can pump solids up to 3 inches in diameter and transport 40–70% solids by volume, making it ideal for high-solids industrial and mining applications.
The 4-Inch Subdredge offers a flow capacity of 250 – 1,000 GPM and can move between 75 – 150 cubic yards of material per hour, depending on material density and site conditions. These production rates make it highly suitable for mid-sized projects, lagoon desludging, tailings pond maintenance, and precision dredging operations.
Yes. The unit uses rubber track technology designed to prevent punctures or tears in clay, poly, or concrete liners. This liner-safe feature makes it a preferred choice for operations in wastewater treatment lagoons, mining tailings ponds, and industrial containment basins where infrastructure integrity is critical.
With a buoy-supported umbilical system, the 4-Inch Subdredge can operate at depths of up to 40 ft in its standard configuration. It can be remotely controlled from distances of up to 1,000 ft, providing operators with the flexibility to dredge from safe locations and manage operations from shore-based control stations or support vessels.
The Subdredge can be powered hydraulically via the auxiliary power of an excavator or a dedicated hydraulic power unit (HPU). The pump circuit typically requires 32–35 GPM at 5,000 PSI, while the cutterhead circuit requires 12–15 GPM at 5,000 PSI. This allows seamless integration with existing heavy-equipment power systems or standalone HPU setups on-site.
Yes. The Subdredge comes equipped with real-time sensors for depth, pressure, swing angle, and vessel orientation. Optional features, such as RTK GPS, acoustic positioning, and internet-enabled remote control, allow operators to monitor and manage dredging operations from remote command centers — even off-site — enabling centralized control of multi-site projects.
The 4-Inch Subdredge prioritizes safety with several built-in features, including hull intrusion sensors with alarms, pneumatic lift bags for emergency retrieval, redundant control systems, and optional camera systems for real-time visual feedback. Because it removes personnel from hazardous dredging zones entirely, it dramatically reduces the risk of accidents and regulatory violations.
The Subdredge is designed for low maintenance and high reliability, with robust wear-resistant components such as a 28% chrome-iron pump casing and a double mechanical seal system with run-dry capability. Its non-clog pump design minimizes blockages, while modular components allow for quick servicing and minimal downtime — critical for industrial operations where uptime directly impacts ROI.
A range of customizable add-ons is available to tailor the system to your project’s needs. These include acoustic imaging for low-visibility dredging, flow meters for production tracking, RTK GPS with USBL positioning for precise dredge path control, rotating cutterheads for compacted materials, and additional lighting or camera systems for enhanced visibility and control in challenging conditions.
For assistance Call and let us help match your project with the right pump.
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