Draper 230V Submersible Clean Water Pump, 108L/min, 250W

The Draper SWP121 is the simplest, lightest submersible pump in the Draper clean water range. Sharing the same 250W motor, 108L/min maximum output, and 6.5-metre head as the SWP120A, it strips the design back to its essentials – no float switch, just a reliable, compact submersible pump with thermal overload protection, a stepped 25–32mm hose adaptor, and a 10-metre cable with approved plug ready to connect to any standard mains socket.

At just 3.55kg – the lightest pump in the entire Draper submersible lineup – it's genuinely one-hand portable and straightforward to deploy in garden ponds, drainage sumps, cellars, and water butts. For users who prefer manual control over their pump, who will be monitoring the pumping task directly, or who simply want the most affordable entry point into the Draper submersible range without compromising on output, the SWP121 delivers exactly what's needed without anything extra.

Key Features & Benefits

Lightest Pump in the Draper Range – Just 3.55kg

At 3.55kg, the SWP121 is the lightest submersible pump Draper makes – lighter even than the SWP120A (3.8kg) and considerably lighter than the larger submersibles in the range. For a user who regularly lifts a pump in and out of a garden pond, lowers it into a water butt, or carries it between locations, every kilogram matters. The SWP121 is light enough to handle entirely with one hand, making deployment and retrieval effortless in virtually any application.

108L/min from 250W – Efficient and Economical

The SWP121 delivers 108 litres per minute from a motor drawing just 250W – among the most flow-efficient submersible pumps available at this price point. Running costs are low: at 250W, daily irrigation cycles across a full growing season add only a modest amount to a typical electricity bill. For a domestic user looking to make practical use of stored rainwater or a garden pond without ongoing high running costs, this efficiency is a genuine advantage.

Thermal Overload Protection

Automatic thermal overload protection cuts motor power if temperature rises beyond safe operating limits, protecting the motor from damage during sustained operation and extending service life. For a pump used regularly in garden and domestic applications, this protection provides reassurance and reduces the risk of premature failure.

Manual Operation – Simple and Direct

Without a float switch, the SWP121 is switched on and off manually, giving the user direct control over when the pump runs and when it stops. This suits applications where the user is present and monitoring the pumping task – draining a paddling pool, topping up a water feature, clearing a flooded space, or transferring water between containers. Always switch off before the water source runs dry to protect the pump from dry running.

6.5m Maximum Head – Right for Domestic Use

A 6.5-metre maximum head covers the typical range of domestic garden pumping tasks: from a submerged position in a pond or butt to a surface-level hosepipe connection, up to a raised irrigation header or wall-mounted line, or out of a cellar to an outside drain. Within this range, the SWP121 performs reliably and efficiently.

Stepped 25–32mm Hose Adaptor – Flexible Connection

The supplied stepped adaptor fits both 25mm (1 inch) and 32mm (1¼ inch) bore hose – the two most common sizes in domestic garden and drainage applications – without additional purchases. Fits straight onto standard garden hose connectors and pump hose fittings.

3mm Particle Tolerance

A maximum particle diameter of 3mm handles the fine sediment, leaf fragments, and mild organic content found in garden pond water, stored rainwater, and domestic drainage – the real-world water conditions this pump is designed for.

10-Metre Cable with Approved Plug

The 10-metre cable with approved mains plug connects directly to a standard 230V outdoor-rated RCD-protected socket, reaching from a submerged position to a surface supply in most domestic layouts without an extension lead.

Full Specification

What's in the Box

• Draper SWP121 Submersible Clean Water Pump
• Stepped 25–32mm hose adaptor
• 10m cable with approved mains plug

Who Is the Draper SWP121 For?

Home Gardeners & DIY Users – A simple, plug-in submersible pump for draining a paddling pool, emptying a water feature, clearing a flooded outhouse, or supplying a garden hose from a pond or butt. No float switch to think about – just switch on, pump, switch off.

Pond & Water Feature Owners – Lower into a garden pond or water feature to drain it for cleaning or seasonal maintenance, supply a fountain or waterfall, or transfer water to another location. At 3.55kg, lifting in and out is effortless.

Cellar & Basement Drainage – Clear standing water from a cellar or basement following a leak or rainfall ingress. Monitor the water level and switch off manually when clear – or connect to a separate float switch controller if automatic operation is preferred.

Allotment & Garden Irrigation – Supply drip lines, sprinkler systems, and hosepipes from a water butt or on-site storage tank during supervised watering sessions. Economical to run at 250W across a full growing season.

Occasional Domestic Tasks – A versatile, lightweight pump to keep on hand for any unexpected water management task around the home and garden. Light enough to store easily and deploy quickly.

Frequently Asked Questions

What is the difference between the SWP121 and the SWP120A? The SWP121 and SWP120A share identical core specifications: 250W motor, 108L/min output, 6.5m head, 32mm outlet, stepped 25–32mm adaptor, 10m cable, and thermal overload protection. The single difference is that the SWP120A includes a float switch that automatically cuts power when the water level drops, while the SWP121 does not. The SWP121 is also marginally lighter (3.55kg vs 3.8kg). Choose the SWP120A for unattended or automated operation where automatic dry-run protection is needed; choose the SWP121 for supervised use where you prefer manual control and the lightest, simplest unit available.

Does the SWP121 need a float switch? No – but you must switch it off manually before the water source runs dry. Running the pump without water flowing through it (dry running) rapidly damages seals and the impeller. For supervised pumping tasks where you're present throughout, manual operation is entirely practical. For unattended or automated irrigation use, the SWP120A's float switch is a worthwhile upgrade.

Can I add a separate float switch? Yes. A separate float switch controller can be connected to the SWP121's power supply to provide automatic dry-run protection if needed. This allows the SWP121 to be used in automated setups while keeping the pump itself simple and lightweight.

What can I run on 108L/min? 108 litres per minute covers a wide range of domestic tasks: supplying a garden drip irrigation system (10–30L/min per zone); powering a garden fountain or waterfall (20–80L/min depending on feature size); draining a 1,000-litre paddling pool in approximately 9 minutes; or continuously filling watering cans at a station fed from a storage tank.

What water types can it handle? The SWP121 is rated for clean water with a maximum particle size of 3mm. Suitable for garden pond water, stored rainwater, and lightly silted drainage water. Not for heavily dirty water, silt, or larger debris – for those applications, refer to the Draper SWP420 dirty water pump.