There are situations where water lingers in minute layers- on flat surfaces, basements, roof decks, or lift shafts, long after standard pumps have given up. That’s where the Tsurumi LSC1.4S puddle sucking pump excels. Designed for residue dewatering, it’s engineered to pump water down to almost nothing, making it ideal for complete flat surface drainage.
In this post, we’ll look at what sets the LSC1.4S apart, where it fits best and how to get the most from this specialist pump.
What Makes the LSC1.4S a “Puddle Sucking Pump”?
Minimal Water Depth Capability
One of the standout features is its ability to operate in extremely shallow water- down to 0.04 inches (≈1 mm). Even a thin film of water that’s impossible to scoop or vacuum can be handled by this pump.
Residue Dewatering Design
The LSC belongs to Tsurumi’s residue dewatering pump series, built to drain surfaces fully when a sump pit or floor slope isn’t present. It’s often called the original pump that “pumps to the floor.”
Durable Construction for Tough Conditions
- Semi-vortex, urethane impeller & wear plates- tough on grit, built to last.
- Dual silicon carbide mechanical seals in oil bath- protects the internals from abrasive particles.
- Top discharge cooling- the pump can run in very shallow water because it uses the discharge flow to help cool the motor.
Flexible Outlet Options
The design includes a dual position outlet port so the discharge hose can be vertical or horizontal, giving flexibility in how you configure the pump on site.
Manual or Automatic Options
You can get the Tsurumi LSC1.4S Puddle Sucking Pump as a manual pump or with an automatic model (float switch or sensor) to reduce hands on oversight.
Technical Snapshot & Capabilities
Discharge size: ¾" (approx.)
Max flow: ~ 45GPM (≈ 170L/min)
Max head: ~ 39ft / 11–12m
Solids handling: ~ 6mm
Water depth requirement: as low as 1mm
Cooling: Air + water cooling via top discharge
Weight: ~ 12kg (manual version)
Voltage options: 110V / 230V (depending on market)
Ideal Use Cases Where the LSC1.4S Shines
- Flat surfaces: rooftops, parking decks, flat slabs, terraces
- Lift pits & basements: situations where you need near zero residual water
- Flood clean up: removing water from ground surfaces where pooling remains
- Hire fleets: it’s compact, versatile and useful across many jobs
- Utility & building services: drainage in mechanical rooms, along pipe runs, or under machinery
Because it can operate in ultra shallow water, the LSC1.4S fills a niche many pumps cannot.
Things to Be Aware Of
- Like all residue pumps, it’s not ideal for heavy solid loads (large debris), it's best for clean or mildly dirty water
- Pumping to high heads or long distances will reduce performance
- Ensure your power supply matches the version you purchase (110V/230V)
- The finer tolerances mean maintenance and seal integrity are critical
Tips to Maximise Performance
- Keep the pump level and stable- avoid tilting.
- Use short, unrestricted suction hoses- minimize losses from bends and friction.
- Screen the inlet- prevent large debris from damaging the pump.
- Always use proper voltage and fusing- ensure the supply is clean and stable.
- Flush post use- rinse with clean water to avoid build up.
Frequently Asked Questions
How shallow can the LSC1.4S pump water from?
It can pump with as little as 0.04 inches (≈1 mm) of water remaining.
Can the Tsurumi LSC1.4S run dry or in very low water for extended time?
Yes, thanks to its cooling route and design, it can handle very low water levels without overheating.
What’s the largest solid particle it can handle?
About 6mm (0.236").
Is the automatic model worth it?
For applications where checking the pump frequently is impractical (e.g. large areas or remote sites), the auto version adds convenience and safety.
Where is the LSC1.4S most effectively used?
On flat surfaces, rooftops, lift pits, light flooding, basement floors. In short, anywhere you need almost total removal of residual water.
Final Thoughts
The Tsurumi LSC1.4S puddle sucking pump occupies a unique niche- it tackles water levels that many pumps can’t touch. Its ability to drain surfaces down to almost zero, combined with durable design and flexible configurations, makes it a powerful tool for contractors, maintenance teams and hire companies alike.
For those challenging drainage tasks where every drop matters, the LSC1.4S is often the go to solution.