Cosmos Pumps Pvt. Ltd. manufactures the CDW Series of submersible dewatering pumps at its ISO 9001:2015 and CE-certified facility in Faridabad, Haryana — engineered to drain construction excavations, mine sumps, tunnels, and municipal infrastructure across India and 22+ export markets.
Flow: 450 LPM – 200 m³/h | Head: 15.5 M – 200 M | Power: 1.5 HP – 120 HP
All CDW variants handle dirty or muddy water with suspended solids 4–12 mm, SG up to 1.1, and pH 5–8. Select by your site’s required discharge head.
| Model | HP Range | Max Shut-Off Head | Max Flow Rate | Best For | Product Page |
|---|---|---|---|---|---|
| CDW Standard | 1.5 – 50 HP | 86.5 M | 8,500 LPM | Construction sites, basements, trenches, general dewatering | View CDW Standard → |
| CDW High Head | 5 – 75 HP | 140 M | 2,200 LPM | Deep tunnels, mine shafts, hydro-electric projects, infrastructure shafts | View CDW High Head → |
| CDW Ultra High Head | 50 – 120 HP | 200 M | 200 m³/h | Deep mine shafts, mountain tunnels, multi-stage relay systems | View CDW Ultra High Head → |
All models: 100% waterproof PVC cable, twin SS mechanical seals (TC vs TC), nitride-hardened SS-410 impellers (HRC 52–55), Class H insulation (180°C).
Foundation excavations, pile caps, basement drainage, and trench works demand pumps that start fast, run continuously, and tolerate site-level solids. CDW Standard pumps — 1.5 HP to 50 HP, flow to 8,500 LPM — are the workhorse of India’s building and infrastructure sector. Cosmos deploys 300+ submersible dewatering pumps in construction annually, supporting EPC contractors on airports, metro corridors, highways, and high-rise foundations.
Construction Dewatering Solutions →
Open-pit sumps and underground mine workings require sustained high-head performance under continuous duty. CDW High Head (up to 140 M) handles deep pit drainage and inflow control. CDW Ultra High Head (up to 200 M) covers the most demanding sump configurations, including multi-relay series installations for phased drawdown in coal, iron ore, and quarry sites. Cosmos serves 50+ mining projects per year across India, Russia, Africa, and Australia.
From NDMA-directed monsoon flood response to Smart City infrastructure works, municipal engineers rely on CDW Standard pumps in parallel configurations for high-volume emergency and planned dewatering. Cosmos deploys 80+ pumps annually for flood control operations alone, covering storm drains, underpasses, and low-lying urban zones during peak monsoon conditions.
Municipal Dewatering Solutions →
Thermal power station ash sumps, ETP/STP foundation works, chemical plant trenches, and process facility pit drainage — CDW pumps handle solids to 12 mm and SG to 1.1, covering the range of industrial contaminated-water applications. For heavy slurry (SG up to 2.1) or thick sludge applications, see the CSL Hi-Chrome Slurry Pump range.
Every CDW dewatering pump is manufactured at Cosmos Pumps’ 25,000 sq. ft. vertical lean manufacturing facility in Faridabad NCR. ISO 9001:2015 certification governs the manufacturing quality system. CE approval meets European export requirements. ZED Gold (Ministry of MSME, Government of India) is the additional qualification required for public sector procurement and defence tenders — the certification that a B2C pump eShop cannot provide.
Where grid power is unavailable — highway construction in remote terrain, border area infrastructure, mining sites with intermittent power — the CDW submersible range pairs with Cosmos CAP Auto-Prime diesel surface pumps for complete, no-manual-priming dewatering coverage. Engine options include KOEL, Eicher, Baudouin, and CAT, covering the supply chain requirements of major Indian EPC contractors.
From NCR construction sites to Bhutan hydroelectric projects, Nigerian infrastructure works to Australian mining operations — the Cosmos CDW dewatering pump range has an installation base verified across the most demanding field conditions globally. First pump shipped 2013. Manufacturer since 2021. All products manufactured to ISO 9001:2015 quality management standards.
A dewatering pump is a submersible or surface pump designed to remove water from construction excavations, mine sumps, tunnels, basements, and flooded areas. Unlike clean-water pumps, dewatering pumps are built to handle dirty or muddy water containing suspended solids — with hardened impellers, sealed motor casings, and corrosion-resistant construction to operate continuously in contaminated water conditions.
Submersible dewatering pump prices in India range from approximately ₹18,000–₹25,000 for a 1.5 HP CDW Standard entry model to ₹3,50,000–₹6,00,000 for a 75–120 HP CDW Ultra High Head unit. Price varies by HP, head requirement, material of construction (standard vs SS316 corrosion-resistant variant for seawater or saline-groundwater applications), and accessories. Contact Cosmos Pumps for a project-specific quotation based on your site flow and head requirements.
For most construction excavations — foundations, basements, pile caps — a 3–10 HP CDW Standard dewatering pump delivering 1,500–4,000 LPM at 25–50 M head is the working range. Larger sites, deeper excavations, or multiple parallel sumps may require 15–50 HP units operating in parallel. The correct HP selection depends on your site’s groundwater inflow rate, static water table depth, and total discharge distance. Contact Cosmos Pumps’ engineering team for a site-specific recommendation.
A submersible dewatering pump (CDW series) operates submerged in the water it pumps, requires grid power, and is suited where the pump must be placed directly in the excavation or sump. A surface dewatering pump (CAP Auto-Prime series) sits above water level, primes automatically without manual intervention, and is diesel-engine driven — preferred where no grid power is available, where portability across multiple site locations is required, or where very high flow rates (up to 74,483 LPM) are needed for flood control or large-scale site drainage.
CDW Standard pumps handle static heads up to 86.5 M. CDW High Head pumps reach up to 140 M. CDW Ultra High Head pumps deliver up to 200 M shut-off head — rated for the deepest Indian mine dewatering and multi-relay tunnel systems. Effective working depth at any given flow rate is read from the pump’s performance curve. Cosmos engineers provide curve-matching for specific site conditions on request.
CDW dewatering pumps handle dirty water with suspended solids up to 12 mm and specific gravity up to 1.1 — covering muddy groundwater, construction site silt, and lightly contaminated water. For heavy slurry duty (SG up to 2.1, solids up to 70% by weight as found in mine tailings, ash transfer, or harbour dredging), Cosmos manufactures the CSL Hi-Chrome Slurry Pump. For thick sludge or sewage bypass applications requiring 70 mm solids passage, the CNC Non-Clog Pump is the correct specification.
CDW dewatering pumps are engineered for low-maintenance site operation: twin mechanical seals (TC vs TC) reduce seal failure risk in abrasive conditions; nitride-hardened SS-410 impellers (HRC 52–55) resist impeller wear under high-solids throughput; and the site-adjustable wear plate gap (±5 mm field-adjustable without specialist tools) extends operational life between workshop returns. Cosmos supplies an instant service pack accessory for rapid site-level seal and wear-part replacement.
Cosmos Pumps operates a rental fleet of 500+ submersible dewatering pumps (3–75 HP) available for hire across India and internationally.
Rent when: your project has a defined end date, you need multiple pump sizes across different project phases, you require immediate emergency backup during monsoon season, or capital expenditure is constrained.
Own when: your organisation runs continuous multi-site dewatering operations, has in-house maintenance capability, requires site-specific variants (SS316 seawater, ZED Gold certification documentation for tender submission), or specifies CDW pumps as standard project equipment.
View Dewatering Pump Rental Options →
ISO 9001:2015 | CE Certified | ZED Gold (Ministry of MSME, GoI)
Cosmos Pumps Pvt. Ltd. — ISO & CE Certified Dewatering Pump Manufacturer
I-23 DLF Industrial Area-I, Faridabad, Haryana | +91 99333 22238 | cosmos@cosmospumps.com