Views: 0 Author: Site Editor Publish Time: 2026-01-23 Origin: Site
Company: ITECH Co., Ltd.
Contact:
Leo: +8615027760800
Steven: +8615031104888
Richard Liu: +8615954483680
Email: info@itechdredge.com
As global urbanization accelerates, the demand for efficient wastewater management has never been greater. Municipalities, industries, and residential areas all depend on submersible sewage pumps to handle the continuous inflow of wastewater, sludge, and solid waste.
A submersible sewage pump is engineered to operate completely underwater, moving sewage or dirty water from pits, tanks, or drainage systems to treatment facilities. Compared with conventional surface pumps, it offers quiet operation, minimal space usage, and superior clog resistance, making it indispensable in modern infrastructure and flood control projects.
A submersible sewage pump is a centrifugal pump designed to transport wastewater containing solids and fibrous materials. Unlike surface pumps, the entire unit — motor and pump — is submerged in the liquid, allowing efficient suction and quiet operation without priming.
| Component | Function |
|---|---|
| Electric Motor | Drives the impeller under sealed waterproof housing |
| Impeller | Moves fluid by centrifugal force |
| Pump Casing | Guides flow and converts velocity into pressure |
| Mechanical Seals | Prevent leakage between motor and pump chamber |
| Float Switch | Controls automatic start/stop depending on water level |
| Cable Gland | Protects electrical connection from moisture ingress |
The pump operates by centrifugal force. When the motor runs, it rotates the impeller, creating a low-pressure zone at the center. Wastewater enters this zone and is thrown outward into the discharge pipe, resulting in a continuous flow.
Because the pump and motor share a sealed chamber, there’s no air entrainment, which improves hydraulic efficiency and priming reliability.
Though both operate underwater, they are engineered for different tasks.
| Feature | Submersible Sewage Pump | Submersible Drainage Pump |
|---|---|---|
| Solid Handling Capacity | Up to 100 mm solids | Usually <10 mm solids |
| Impeller Type | Vortex, channel, or cutter | Open or semi-open |
| Motor Power | 0.75–30 kW | 0.3–10 kW |
| Material Construction | Cast iron or stainless steel | Aluminum or light steel |
| Main Use | Sewage, sludge, wastewater | Clean or slightly dirty water |
| Maintenance Frequency | Moderate | Low |
Key Takeaway:
If your fluid contains fibers, sludge, or human/industrial waste, you need a submersible sewage pump, not a simple drainage pump.
To fit different working conditions, submersible sewage pumps come in several types:
Free passage impeller, less clogging
Ideal for fibrous wastewater and large solids
High efficiency with single or double channels
Used in municipal pumping stations
Equipped with cutting blades to chop solid materials
Common in slaughterhouses, food processing, and textile wastewater
Breaks waste into fine particles before pumping
Suitable for residential and small commercial sewage systems
Installed directly in sumps or tanks — no need for pump houses or extensive piping.
The liquid layer naturally insulates noise, ensuring quiet function in residential zones.
Eliminates suction lift limitations; the pump is always primed and ready to start.
Fully sealed motor and double mechanical seals prevent water ingress and electrical hazards.
Float or sensor control allows unattended operation and energy savings.
Handles a wide range of liquids — from domestic wastewater to industrial effluents and stormwater.
| Application Area | Description | Recommended Type |
|---|---|---|
| Municipal Sewage Systems | Pumping wastewater to treatment plants | Channel or vortex impeller |
| Flood Control Stations | Removing accumulated stormwater | High-flow submersible pump |
| Industrial Wastewater | Handling greasy or chemical wastewater | Cutter or grinder pump |
| Residential Complexes | Transferring domestic sewage | Grinder pump |
| Construction Sites | Dewatering muddy foundations | Vortex impeller pump |
| Agriculture & Farms | Wastewater recycling and manure pumping | Cutter-type pump |
| Model | Power (kW) | Flow (m³/h) | Head (m) | Outlet (mm) | Solids Max (mm) |
|---|---|---|---|---|---|
| ITECH-SP65 | 1.5 | 30 | 10 | 65 | 25 |
| ITECH-SP100 | 3 | 60 | 15 | 100 | 50 |
| ITECH-SP150 | 7.5 | 120 | 20 | 150 | 65 |
| ITECH-SP200 | 15 | 250 | 25 | 200 | 80 |
| ITECH-SP250 | 22 | 400 | 30 | 250 | 100 |
Custom designs with stainless steel or explosion-proof motors are available for industrial and hazardous environments.
| Capacity | Application | Material | Price Range (USD) |
|---|---|---|---|
| Small (1.5–3 kW) | Domestic sewage / small tanks | Cast iron | $250 – $500 |
| Medium (5–10 kW) | Industrial wastewater | Stainless steel | $800 – $1,500 |
| Large (15–30 kW) | Municipal or flood control | Cast iron / ductile iron | $2,000 – $4,500 |
| Customized (Explosion-proof) | Oil & gas, mining | Alloy steel | $4,000 – $7,000 |
Actual prices vary based on motor protection level, solid-handling design, and material grade.
Choosing the correct model depends on liquid type, flow requirements, and installation conditions.
Solid size and composition
pH level and temperature
Oil or fiber content
Required head (lift height)
Flow rate (discharge capacity)
Duty cycle (continuous or intermittent)
Cast iron for general sewage
Stainless steel for corrosive or chemical wastewater
Ductile iron for heavy-duty municipal use
Wet installation: pump submerged permanently
Dry installation: motor sealed in separate chamber with cooling jacket
ITECH offers automatic float control and intelligent monitoring for motor temperature, leakage, and vibration.
Spring marks the onset of high rainfall in many regions, causing sewage systems to experience heavy inflow. During this period, submersible sewage pumps play a crucial role in preventing urban flooding and backflow.
Moderate temperatures help maintain motor efficiency
Pre-flood season maintenance prevents clogging during storms
Reduced sediment load compared to summer months
Ideal time for inspection and capacity testing
Regular spring operation ensures uninterrupted performance throughout the rainy season.
Proper maintenance extends pump life and reduces downtime.
| Problem | Cause | Solution |
|---|---|---|
| Pump not starting | Float switch stuck or motor overload | Check switch, reset protection |
| Low flow rate | Impeller clogged | Clean impeller and suction port |
| Excessive vibration | Worn bearing or unbalanced impeller | Replace bearing, inspect shaft |
| Overheating | Poor cooling or excessive solids | Check water level and impeller clearance |
| Leakage | Damaged mechanical seal | Replace seal set |
| Noise | Cavitation or air pockets | Ensure full submersion and vent system |
Inspect cable insulation monthly
Clean impeller and casing quarterly
Replace oil in seal chamber every 6 months
Run test after long idle periods
To ensure safe and efficient operation, ITECH recommends the following control strategies:
Float switches or ultrasonic sensors activate the pump only when required, saving energy.
Two pumps installed in one sump can alternate duty, reducing wear and ensuring backup reliability.
Thermal sensors embedded in the stator prevent overheating under heavy loads.
Optional IoT modules allow real-time data tracking for municipal systems — flow, head, and energy usage.
ITECH installed dual 15 kW submersible sewage pumps handling 220 m³/h flow with zero clogging for six months of operation.
Cutter-type pumps processed greasy wastewater with high solids; blades remained intact after 1,200 hours.
Submersible pumps transferred manure slurry, reducing labor cost by 40% through automatic level control.
ITECH’s submersible sewage pumps are built with IE3 efficiency-grade motors and optimized hydraulic design to reduce energy consumption by up to 15%.
Advanced sealing systems also prevent wastewater leakage, aligning with environmental protection standards.
ITECH Co., Ltd. is a professional manufacturer and solution provider for submersible sewage pumps, dredging pumps, and hydraulic systems, serving customers worldwide.
ISO-certified manufacturing quality
Full customization for flow rate, head, and material
Optional explosion-proof and anti-corrosion designs
Long-term technical support and spare parts supply
Rapid delivery and international project experience
ITECH engineers work directly with clients to design reliable, maintenance-friendly systems suitable for municipal, industrial, and environmental applications.
Q1: What’s the difference between sewage and wastewater pumps?
A: Sewage pumps handle solids and fibers, while wastewater pumps are mainly for clear or light contamination.
Q2: Can the pump run dry?
A: No. Continuous dry running can damage seals — always ensure proper submersion.
Q3: What protection does ITECH use for its motors?
A: Double mechanical seals, oil chamber cooling, and thermal sensors.
Q4: How often should I replace seals?
A: Typically every 8,000–10,000 working hours, depending on conditions.
Q5: Do you offer custom discharge sizes?
A: Yes, from 50 mm to 300 mm outlets, adjustable for existing pipelines.
The submersible sewage pump is more than a piece of equipment — it’s a vital link in protecting cities and industries from environmental pollution and flooding.
With advancements in motor sealing, impeller design, and control systems, modern pumps like those from ITECH Co., Ltd. deliver quiet, efficient, and long-lasting performance across diverse wastewater applications.
For long-term reliability, energy savings, and technical support, partner with ITECH — your trusted manufacturer of professional submersible sewage pumps.
Email: info@itechdredge.com
Phone:
Leo: +8615027760800
Steven: +8615031104888
Richard Liu: +8615954483680
ITECH Co., Ltd. — Professional Submersible Sewage Pump Manufacturer
Efficient. Durable. Engineered for Every Flow.
