The Submersible Centrifugal Pump models ST61230 and ST61460 from Multiquip are engineered for high-capacity, heavy-duty dewatering and fluid transfer operations in construction, utilities, municipalities, and demanding commercial environments. Designed for maximum reliability, minimal maintenance, and robust power, these 6-inch pumps are ideal for moving large volumes of water with solids in demanding situations—such as site dewatering, sewer bypass, and flood control.

Product Overview: ST61230 and ST61460

Both the ST61230 and ST61460 deliver outstanding 674 GPM performance, utilizing a 6-inch discharge and a powerful 15 HP motor. The ST61230 operates at 230 volts (three-phase), while the ST61460 runs at 460 volts (three-phase). Both units feature a rugged stainless steel housing, high-chrome steel impeller, heat-treated stainless steel output shaft, and oil-filled double mechanical seals for outstanding lifespan and trouble-free operation.

Key Features and Benefits

• High Flow Performance: Delivers up to 674 gallons per minute (2,494 LPM) with a total head of 105 feet (32 m), making these pumps perfect for fast dewatering or large transfer jobs.

• 6" NPT Discharge: Moves significant volumes quickly; accommodates standard hoses and piping for versatile site setup.

• 15 HP, Three-Phase Motor: Reliable electric power with thermal/over-current protection; choose between 230V (ST61230) or 460V (ST61460) for best match to your power supply.

• Durable Stainless Steel Construction: Outer casing and suction strainer resist corrosion, abrasion, and impact for maximum field service life.

• Double Mechanical Oil-Filled Seals: Prevent water intrusion and maintain lubrication even during dry runs or extended operation.

• High Chrome Impeller: Dynamically balanced and built for abrasive resistance, delivering durability and minimal clogging.

• Solids Handling: Passes spherical solids up to 0.6" (15 mm), making it suitable for construction slurry, debris-laden water, and storm runoff.

• Heat-Resistant and Versatile: Pumps liquids up to 140°F (60°C) with a pH range of 4–10, providing excellent adaptability to different site conditions.

• 33-ft Molded Power Cord: Strain relief and waterproof design enable simple installation and safe site deployment.

• Easy Impeller Clean-Out: Simplifies on-site maintenance to keep productivity up and downtime low.

Technical Specifications

Real-World Applications

• Construction Site Dewatering: Removes water fast from foundations, excavations, trenches, and below-grade pours.

• Sewer & Bypass Emergency Operations: Handles debris-laden sewage, runoff, and groundwater with reliability and high throughput.

• Municipal & Utility Flood Control: Flooded underpasses, pumping stations, and stormwater vaults are cleared efficiently.

• Industrial & Utility Water Transfer: Moves large volumes in cooling systems, process industries, or water system repairs.

Installation, Safety, and Maintenance

• Control Box Required: Both ST61230 and ST61460 pumps require a control box for safe On/Off, overload, and float switch capability.

• Thermal and Voltage Protection: Built-in safety for both the pump and operator, automatically shutting down if overloads or temperature spikes occur.

• Easy Clean and Inspection: Access to impeller and strainer for on-site maintenance keeps pumps ready for service, minimizing repair times.

Comparison: ST61230 / ST61460 vs. Standard 6-inch Submersible Pumps

Why Choose the ST61 Series for Your Jobsite?

• Best-in-Class Durability: Stainless steel construction, advanced sealing, and impeller design make these pumps reliable and long-lived for repeated, harsh use.

• Power for Demanding Jobs: Moves hundreds of gallons per minute even against high static head, while handling solids and debris that defeat lesser pumps.

• Flexible, Mobile Installation: Compact 14" diameter fits confined spaces; long power cord eases deployment.

• Easy Service: Rapid access to impeller and seals keeps field crews productive and minimizes delays.

This comprehensive, SEO-optimized guide to the “Submersible Centrifugal Pump - ST61230 / ST61460” highlights all key specifications, unique selling points, and performance advantages for construction, utility, and municipal buyers. Rely on these Multiquip pumps for high-output, low-maintenance service and get the job done right. For fast quotes, accessories, and expert support, contact a Multiquip dealer or authorized pump specialist.The Submersible Centrifugal Pump models ST61230 and ST61460 are heavy-duty, industrial-grade pumps ideal for contractors, utility crews, and municipalities needing powerful and reliable water-moving capabilities. Designed by Multiquip, these 6-inch discharge pumps deliver outstanding performance in dewatering, flood response, sewer bypasses, and high-volume fluid transfer, all while offering a dependable low-maintenance design optimized for harsh work environments.

Overview: ST61230 / ST61460 Submersible Centrifugal Pump

Both models are engineered for demanding applications. The ST61230 runs on 230V three-phase power, while the ST61460 uses 460V three-phase input. Each pump features a 15 HP, 60 Hz motor producing an impressive 674 GPM flow at a maximum total head of 105 feet. Rugged in build and rich in professional features, these models solve the critical need for fast, reliable, and safe water removal in confined spaces or open areas.

Key Features and Benefits

• 15 HP High-Efficiency Motor: Provides serious pumping muscle for drainage, transfer, and bypass operations, and is rated for continuous duty at high output.

• 6-inch NPT Discharge: Moves water at 674 GPM—ideal for jobs needing quick response, aggressive dewatering, or efficient transfer to storm drains or holding ponds.

• Stainless Steel Housing & Strainer: Resists rust, abrasion, and impact; ideal for both clean water and debris-laden environments.

• Oil-Filled Double Mechanical Seals: Ensure the motor stays protected from water ingress and can safely run dry without damage.

• Dynamically Balanced High-Chrome Impeller: Engineered for efficiency and long life, passing solids up to 0.6 inches while resisting wear and clogging.

• Thermal/Voltage Overload Protection: Paired with a control box (CB1274 for 230V or CB1463 for 460V), these features prevent costly failures and enable safe shutdowns or float switch automation.

• Heat- and Chemical-Resistant: Capable of pumping fluids up to 140°F (60°C) in pH ranges of 4–10, accommodating hot jobsite or process water.

• 33' Power Cord with Strain Relief: Facilitates flexible installation at site boundaries, sumps, or below-grade vaults.

Technical Specifications (Both Models)

Durability & Maintenance

• Double Mechanical Seals: The oil-filled, dual-seal design guards against leaks and prolongs motor life, drastically reducing service intervals compared to standard pumps.

• Easy Impeller Clean-Out: Maintenance or service is simplified with easy access to the high-chrome impeller, even when debris or sediment is present.

• Abrasion Resistance: Key materials—chrome steel, 410/304 stainless—extend service life against gravel, silt, sand, and chemical intrusion.

Application Suitability

The ST61230 and ST61460 excel in:

• Construction/post-storm dewatering and rapid response

• Utility trench and vault drainage

• Sewer bypass and holding tank management

• Mining, tunneling, and ground water control

• Industrial process water and system cleaning applications

Their robust design and smart protections make them the preferred tool for both planned installations and urgent, first-response water-moving needs.

Control and Accessories

• Control Boxes: Required for safe, automated operation and protection—models CB1274 (230V) or CB1463 (460V) support stop/start, thermal, over-current, and float switch connections.

• Adapters, Hoses, and Floats: Easily paired with standard 6-inch accessories or float switches for complete site control and monitoring.

Competitive Comparison

Why Choose Multiquip ST61 Series?

• High reliability, minimal downtime: Stainless construction, premium seals, smart motor protection.

• Supreme flow and head: Outperforms lightweight or standard utility pumps in heavy-duty jobs.

• Easy setup and flexibility: Fits the needs of contractors, utilities, and public works from one storm to year-round service.