If you work in construction, utilities, tool hire or flood response, the Tsurumi LSC1.4S is a pump you will almost certainly have come across. It is widely regarded as the benchmark puddle sucker, not because it is the cheapest option, but because it was one of the first to market and is so durable. It is comparable to the Henry vacuum cleaner, in that its reputation has been built through volume, longevity and continued use rather than marketing claims.
What is a puddle pump (or puddle sucker)?
A puddle pump is a specialist submersible pump designed to remove water down to an extremely shallow level, typically just a few millimetres. The Tsurumi LSC1.4S in manual guise can pump as low as 1mm. By comparison, most standard submersible pumps leave a significant depth of residual water behind, which then has to be removed manually, and if a standard submersible is left running in low water it is likely to burn out or sustain irreparable damage. For the full background on this type of pump, see what is a puddle pump. Puddle pumps are commonly used where even small amounts of standing water are unacceptable, such as:
- Construction slabs and screeds
- Basements and lift pits
- Service ducts and manholes
- Flood recovery inside buildings
The key benefit is how close to dry the pump can leave a surface.
Buy the Tsurumi LSC 1.4S, or see how it compares in our Top 5 puddle pumps.
A manufacturer with over a century of experience
Tsurumi Pumps was founded in 1924 and, unlike many brands in the pump market, still designs and manufactures its own equipment. That long history shows in products like the LSC range: the design reflects decades of feedback from construction sites, hire fleets and utilities, and the result is a durable, hardwearing puddle pump.
Pumps down to 1mm: where the LSC1.4S excels
The main focus of the Tsurumi LSC1.4S is its ability to pump water down to approximately 1mm. In practical terms that means no puddles left behind, less manual cleanup, and a faster return to work on slabs and floors. This capability is what gives the pump its puddle sucker reputation and why it is so widely specified for finishing works and flood recovery.
Designed for real site water
Site water is rarely clean. Sand, silt and fines are almost always present, particularly in groundworks, utilities and flood scenarios. The LSC1.4S is designed to cope with this:
- Double mechanical seal with oil lifter for positive lubrication in any operating position
- Silicon carbide shaft seal for durability
- Urethane impeller and wear components for excellent abrasion resistance
This robustness is one reason the LSC range is favoured by tool hire companies, where pumps are expected to survive repeated use in poor conditions.
Rotating outlet discharge: simple but effective
The top discharge outlet can be rotated from vertical to horizontal in seconds.
This small feature has a big impact on site: it reduces hose kinking, lets you change discharge direction quickly, improves cooling via the water and air-cooling channel, and helps avoid obstructions in confined spaces. It is done quickly with a 13mm socket or spanner to loosen the outlet, rotate it and refit it, as pictured.
Manual or automatic, 230V or 110V
The LSC range comes in configurations to suit different environments: manual or automatic versions, and 230V or 110V for construction sites and hire fleets. The automatic versions include a level sensor so the pump can run unattended, switching off and on as required, which is particularly useful in basements and excavations. There are two automatic varieties: the LSC with Sensor, which is portable and can be moved between locations, and the LSC with SwitcH2O and control panel for fixed installations such as lift shafts. The Sensor has two 304 stainless steel probes (with detachable extensions) encapsulated in moulded rubber for portable use; when both probes touch water the pump starts and continues for one minute after the level drops. The SwitcH2O has three 304 stainless steel probes (on, off and common) set in an epoxy-resin holder, designed for fixed installations. Our guide to automatic water pumps and the different switches explains how these compare to float switches.
Lightweight but robust construction
The LSC is built with quality materials for durability:
- Pump casing: rubber
- Impeller: urethane
- Outer cover: steel
- Bearing housing: cast aluminium
- Stand: cast aluminium
- Shaft: stainless steel (410S)
- Non-return valve: rubber
This balance makes it easy to handle yet robust enough for demanding sites.
Rubberised base for finished surfaces
The rubberised base lets the pump sit directly on concrete slabs or finished surfaces without causing damage, which matters in flood recovery and retrofit situations where protecting existing finishes is important.
Built-in non-return valve
An integral non-return valve stops water flowing back from the discharge hose when the pump stops, which keeps the pump primed, allows a faster restart, and reduces wear associated with dry running.
Supplied ready for site use
The LSC1.4S comes with 10 metres of heavy-duty rubber power cable as standard, reducing reliance on extension leads and lasting better than PVC cable in wet, abrasive environments. Buy the Tsurumi LSC 1.4S, or if you need help choosing between low-level pumps, use the Pump Finder.
