The Tsurumi LSC1.4S Automatic combines professional puddle-sucker performance with sensor-controlled operation. It is designed for applications where water may return and the pump needs to start and stop automatically without relying on a conventional mechanical float switch.
This makes it particularly well suited to fixed installations, narrow sumps, lift shafts, service pits, construction sites and areas affected by recurring surface-water ingress.
The pump delivers up to 170 litres per minute, has a maximum head of 11 metres and is available with automatic control arrangements for portable or permanent use.
Manufactured by Tsurumi Pumps, the LSC1.4S is supplied with a 3-year product guarantee.
The Tsurumi LSC1.4S Automatic is an excellent choice where automatic operation and very low residual water levels are both required.
Unlike a conventional automatic submersible pump with a large mechanical float, the LSC1.4S can use compact stainless-steel probes to detect water. This allows it to operate in shallow water and restricted spaces where a traditional float switch may not have sufficient room to rise and fall.
Its professional construction and maximum flow rate of 170 litres per minute make it suitable for domestic, commercial and industrial drainage systems.
The available automatic control options use stainless-steel probes to detect water and control the pump.
There are two principal arrangements:
The LSC1.4S pump itself is capable of removing water down to approximately 1mm. The actual automatic stopping level will depend on the selected control arrangement and the position of its sensors or probes.
The Sensor Switch option can achieve an off level as low as approximately 1mm, depending on the size, shape and condition of the area being drained.
The SwitchH2O and control-panel system enables automatic pumping down to circa 5mm, with the exact start and stop levels determined by the installation and positioning of the probes.
The optional extension probes are used with the Sensor Switch arrangement. They extend the sensing points closer to the surface being drained, allowing the pump to activate at a lower water level.
The extension probes do not increase the hydraulic pumping capability of the LSC1.4S. The pump itself is already designed to remove water down to approximately 1mm.
How it works: When the probes detect water, the pump activates and continues running for one minute after water drops below the probe. If water touches the probe again within that time, it continues running until clear.
NOTE: Probe extensions are only available on the Sensor options.
No conventional mechanical float switch is required. The available automatic arrangements use stainless-steel probes to detect water.
This makes the automatic LSC1.4S particularly useful in narrow sumps, shallow areas and restricted spaces where a tethered or vertical float switch may not have sufficient room to operate reliably.
Yes. The automatic controls are designed to start and stop the pump in response to changing water levels, making the pump suitable for recurring water ingress and installations where an operator will not always be present. As an example, the LSC is popular in automatic guise for lift shafts.
For permanent or unattended use, the complete installation should be designed appropriately. This includes the electrical supply, discharge route, non-return arrangements, alarm provision and the consequences of pump or power failure.
The SwitchH2O and control-panel arrangement will generally be the more appropriate option for a permanent fixed installation.
Choose the Sensor Switch where you need a compact automatic pump for portable use, shallow water, a narrow sump or an installation that may occasionally need to be moved.
Choose the SwitchH2O and control panel for a permanent fixed installation where defined start and stop levels and panel-based control are required.
The automatic Tsurumi LSC1.4S delivers a maximum flow rate of up to 170 litres per minute and has a maximum head of 11 metres.
The selected automatic control changes when the pump starts and stops, but it does not increase the hydraulic output of the pump.
Actual flow will depend on the pumping height, hose diameter, hose length, bends, fittings and other resistance within the discharge arrangement. Maximum flow and maximum head occur at different points on the pump curve.
Yes. The pump is suitable for drainage water and typical floodwater containing sand, silt and suspended solids up to approximately 5mm.
It is not intended for raw sewage, heavily contaminated water or liquids containing large, stringy or fibrous solids.
An integral non-return valve helps prevent water held within the discharge hose from flowing back through the pump when it stops.
This supports low-level automatic operation by reducing the amount of discharged water returning to the drained area after each pumping cycle.
Yes. The discharge outlet can be arranged horizontally or vertically to suit the available space and hose route.
This can reduce hose kinking and is particularly helpful in narrow sumps, lift shafts and other restricted installations.
Choose the automatic LSC1.4S where water levels may rise again and the pump needs to respond without an operator manually switching it on and off.
Choose the manual LSC1.4S for temporary flood response, portable drainage and applications where an operator will remain present and control the pump directly.
Prefer direct manual control? See the manual Tsurumi LSC1.4S puddle sucker pump.
Always confirm that the available electrical supply is compatible with the selected pump and automatic control equipment.
The automatic LSC1.4S is supplied with a 25mm outlet as standard. A 50mm outlet option can be selected when ordering.
A larger-diameter hose may reduce friction losses on longer discharge routes. The most suitable outlet size will depend on the hose length, vertical lift, available space and required operating flow.
The Tsurumi LSC1.4S is constructed for demanding professional use. It features a pressed-steel outer casing and cast-aluminium pump stand for strength and stability.
Wear-resistant components help the pump cope with drainage water containing suspended sand and silt, while the silicon carbide mechanical seal provides durability during repeated use.
Its top-discharge design creates an air and water-cooling route around the motor, supporting extended operation in shallow water and seepage conditions. The pump should not be deliberately operated dry for prolonged periods.
| Model | LSC1.4S | LSC1.4S c/w Sensor | LSC1.4S c/w H2O & Panel |
|---|---|---|---|
| Manual/ Auto | M | A | A |
| Outlet/ mm | 25 & 50 | 25 & 50 | 25 & 50 |
| Power/ kW | 0.48 | 0.48 | 0.48 |
| Voltage/ V | 110/230 | 110/230 | 110/230 |
| Flow Rate L/min | 170 | 170 | 170 |
| Head /m | 11 | 11 | 11 |
| On Level/ mm | NA | 258 | 15-50 |
| Off Level/ mm | NA | 85 | 5-40 |
| Free Passage | 5 | 5 | 5 |
| W x L x H /mm | ø196 x 316 | 227 x 196 x 316 | 221 x 196 x 316 |
| Weight/ Kg | 12 | 12.7 | 12.05 |
Floodandwaterpumps.co.uk has been specially designed to simplify the types of pumps into categories to make choosing the best pump for your requirements easy.
We are often asked how to attach the hose to a pump, and have created this 'how-to' video to demonstrate. The pump and accessories listed are all available at floodandwaterpumps.co.uk
Layflat hose is very affordable but can kink. Depending on your use, you may be better using a reinforced suction delivery hose for your needs.
Suction delivery hose is ideal for pumping up stairs or over obstacles.
Jonathan Martin explains the differences to help you choose which hose is best for your scenario.
As an optional extra, extension probes are available for the Auto Sensor model, which enable pumping down between 85mm and circa 1mm. The extensions are an optional extra and available here:
170mm Sensor Extension Probes.
