Draper 110V Submersible Clean Water Pump with Float Switch, 100L/min, 250W

The Draper SWP105A110 is the only submersible pump in the Draper range designed for 110V centre-tapped earth (CTE) power supply – making it the natural choice for UK construction sites, groundworks contractors, and any application where HSE guidance or site rules require 110V reduced low voltage equipment rather than 230V mains.

Delivering 100 litres per minute through a 32mm outlet from a 250W motor, it brings the same practical submersible pumping capability found in the 230V range to the site environment: automatic float switch protection, ceramic shaft construction for extended service life, thermal overload protection, a stepped 25–32mm hose adaptor for connection to standard pump hose, and a 10-metre cable with approved 110V plug. For site managers, groundworkers, and contractors who need to pump clean water from excavations, sumps, and drainage areas using compliant site power, the SWP105A110 is purpose-built for the job.

Key Features & Benefits

110V CTE Supply – Fully Site Compliant

The defining feature of the SWP105A110 is its 110V voltage rating. UK construction sites operating under HSE guidance on reduced low voltage systems require 110V centre-tapped earth equipment for handheld and portable tools used in wet or exposed conditions. The SWP105A110 runs directly from a standard site transformer output without adaptors or voltage converters, making it the only submersible pump in the Draper range that is fully compliant for use on UK construction sites as a portable site tool.

100L/min Output – High Flow for Site Drainage

At 100 litres per minute, the SWP105A110 moves 6,000 litres of water per hour – sufficient to clear a flooded inspection pit, drain a waterlogged excavation, and keep up with groundwater ingress in a typical site sump. While slightly lower than the 108L/min of the 230V SWP120A and SWP121, the output difference is minimal in practice and more than adequate for the site drainage tasks this pump is designed for.

Ceramic Shaft for Extended Service Life

The ceramic shaft is a premium quality component that significantly extends service life compared to standard metal shafts, particularly in the abrasive conditions of site water pumping. Ceramic resists corrosion and wear from the gritty, particulate-laden water found in construction excavations far better than steel, reducing seal wear and extending the interval between maintenance requirements. For a pump in regular site use, this is a meaningful long-term advantage.

Float Switch – Automatic Dry-Run Protection

The float switch monitors water level and cuts power automatically when it drops below the minimum safe operating depth, protecting the pump from dry running without manual monitoring. On a busy construction site where the pump may run unattended in a sump while other work proceeds, this automatic protection is essential for pump longevity and reliable operation.

Thermal Overload Protection

Automatic thermal overload protection cuts motor power if temperature exceeds safe limits during sustained operation, providing a second layer of motor protection alongside the float switch. Critical for a pump running continuously in a site sump through a working day.

5mm Particle Tolerance – Handles Site Water

With a maximum particle diameter of 5mm, the SWP105A110 tolerates the coarser sediment, fine gravel, and particulate content typical of excavation and groundwater – wider than the 3mm tolerance of the 230V domestic submersibles and better matched to the water quality found on construction sites.

6m Maximum Head – Site Sump and Drainage Applications

A 6-metre maximum head covers typical site drainage requirements: pumping from a sump at the bottom of an excavation to discharge at ground level, and along useful hose runs to a site drainage point. Sufficient for the majority of construction site dewatering scenarios.

Stepped 25–32mm Hose Adaptor – Standard Site Hose Compatibility

The stepped 25–32mm adaptor is compatible with the standard hose sizes used across site drainage and irrigation setups, allowing connection to existing site hose without additional fittings.

10-Metre Cable with Approved 110V Plug

The 10-metre cable provides adequate reach from a submerged position in a sump or excavation to a site transformer or 110V distribution board at the surface. The approved 110V plug fits standard site transformer outlets directly.

Lightweight at 3.9kg

At 3.9kg, the SWP105A110 is easy to lower into and retrieve from a site sump single-handedly, reposition as work progresses, and transport between site locations. Compact enough to store in a site toolbox or van shelf.

Full Specification

What's in the Box

• Draper SWP105A110 110V Submersible Clean Water Pump
• Stepped 25–32mm hose adaptor
• 10m cable with approved 110V plug

Who Is the Draper SWP105A110 For?

Construction & Groundworks Contractors – The only submersible pump in the Draper range built for site transformer power. Drain sumps, clear flooded excavations, remove groundwater from footings and trenches, and manage site drainage compliantly from standard 110V site power.

Civil Engineering & Infrastructure Sites – Keep excavations, culverts, and drainage channels clear of water during active works using compliant 110V equipment that meets site electrical safety requirements.

Site Managers & Principal Contractors – Provide compliant, automatic site drainage without the fuel costs, noise, and exhaust of a petrol pump where a 110V supply is available at the work area.

Hire Fleets for Construction – A 110V submersible pump is a standard item in any plant hire offering targeting the UK construction market. The ceramic shaft and float switch make it robust and low-maintenance enough for regular hire use.

Drainage & Utilities Contractors – Pump groundwater and surface water from utility excavations, inspection chambers, and drainage structures using equipment that complies with site electrical safety requirements.

Frequently Asked Questions

Why is 110V important on a UK construction site? HSE guidance recommends 110V centre-tapped earth (CTE) systems for portable electrical equipment used in wet, outdoor, or confined space conditions on construction sites. In a CTE system, the maximum voltage to earth is 55V rather than 230V, significantly reducing the risk of electrocution in the event of a fault. Most UK construction sites require 110V CTE equipment for portable tools used outdoors – the SWP105A110 is designed specifically to comply with this requirement.

Can I use the SWP105A110 from a standard 230V mains socket? No. The SWP105A110 is designed for 110V CTE supply only and must not be connected to a 230V mains socket. For 230V applications, the SWP120A (with float switch) or SWP121 (without float switch) are the equivalent domestic submersible options.

How does the SWP105A110 compare to the 230V SWP120A? Both are lightweight submersible pumps with float switches, ceramic shafts (SWP105A110 only), thermal overload protection, stepped 25–32mm adaptors, and 10-metre cables. The key difference is voltage: the SWP105A110 runs on 110V CTE site power; the SWP120A runs on 230V mains. The SWP105A110 also has a wider particle tolerance (5mm vs 3mm), better suited to site water conditions. For site use on 110V power, the SWP105A110 is the correct choice; for domestic and garden use on 230V mains, choose the SWP120A.

Does it need a site transformer? Yes. The SWP105A110 requires a 110V CTE supply, typically provided by a site transformer (110V step-down transformer) connected to a 230V mains supply. Site transformers are standard equipment on UK construction sites and available separately from plant hire suppliers and tool dealers.

What is the 5mm particle tolerance suitable for? The 5mm particle diameter tolerance handles the coarser sediment, fine gravel, and particulate content typically found in groundwater and excavation water on construction sites – wider than the 3mm tolerance of the domestic submersibles. It is not suitable for large solids, stones, or construction debris. For heavily contaminated water carrying larger solids, the petrol trash pump PWP82T is the appropriate choice.