BBC Semisom 635 Dirty Water Submersible Pump | 1.1kW High Flow, 15m Head

Semisom 635 Dirty Water Submersible Pump: High Flow 1.1kW Wastewater Pump with 15 Metre Head

When the job calls for serious volume, the BBC Semisom 635 delivers. Its 1.1kW coolant filled motor moves up to 650 litres of dirty water per minute and pushes to a 15 metre head, so it clears deep basements, long discharge runs and high demand chambers that would overwhelm smaller drainage pumps. A double channel impeller with 32mm free passage handles fibrous and contaminated wastewater without clogging, and 110V, 230V and 400V options cover everything from hire fleet work to fixed three phase installations.

What is the Semisom 635 pump used for?

The Semisom 635 is the step up model for high volume wastewater and demanding drainage work. Typical applications include:

•        Commercial and industrial wastewater transfer

•        Construction site dewatering at higher flow rates

•        Deep basement and underground car park drainage

•        Septic tank and treatment chamber pumping

•        Flood recovery where large volumes must shift fast

•        Hire fleet and emergency response duties

With a 15 metre maximum head, it also suits installations where water must be lifted from deep chambers or pumped over longer horizontal distances.

Construct and Durability

Every wetted component of the Semisom 635 is specified for punishing wastewater duty. The hydraulic end is cast iron for abrasion and impact resistance, while stainless steel motor components shrug off corrosion during years of submerged service. Heat from the larger 1.1kW motor is managed by a coolant filled design that allows sustained running without burnout, and a silicon carbide mechanical seal provides a hard wearing barrier between pumped liquid and motor. The double channel impeller geometry maintains hydraulic efficiency while passing 32mm solids.

Why choose the Semisom 635?

The Semisom 635 earns its place where downtime is expensive. Contractors and facilities teams pick it because it combines the flow of a much larger pump with a 21.3kg body that one person can still handle, and because its service intervals stay long even under continuous load. If you regularly find smaller drainage pumps running flat out and still falling behind, the 635 gives you the headroom to clear water faster and run the pump well within its comfort zone, extending its working life. Manual and automatic float switch versions let you specify it for attended site work or unattended duty in permanent chambers.

Draining a smaller sump or cellar? The lighter Semisom 262 handles the same 32mm solids for less.

Operational Details

•        Motor power: 1.1kW

•        Maximum flow rate: 650 litres per minute (automatic), 640 litres per minute (manual)

•        Maximum head: 15 metres

•        Free passage (solids handling): 32mm

•        Outlet size: 50mm

•        Voltage options: 110V or 230V single phase, 400V three phase (manual); 110V or 230V (automatic)

•        Impeller: double channel

•        Capacitor: internal on 230V models, external capacitor box on 110V models

•        Dimensions (W x L x H): 250 x 172 x 484mm

•        Weight: 21.3kg

What's in the box

•        1x Semisom 635 submersible pump (model as selected)

•        1x 10m H07RN heavy duty rubber power cable

•        External capacitor box (110V models only)

•        Manufacturer documentation and user guide