Grundfos Unilift KP 350 A1

The Grundfos Unilift KP 350 A1 Submersible Puddle Pump is a beautiful, impressive looking device. This lightweight single-stage pump can process both clean and slightly dirty water. The stainless steel pump body – made from one piece – makes the pump very robust, solid, and easy to maintain. It can be used in temporary and permanent freestanding setups and is also suitable to be installed in collecting tanks. The pump is fitted with a semi-open impeller that can process solids up to a diameter of 10 mm. This makes it ideal for pumping jobs in and around the house. The pump also has automatic overload protection, which switches the motor off if there is a risk of overheating. The motor automatically switches back on after it has cooled down to the correct temperature.

Models

When it comes to capacity and delivery head (the height at which a pump can raise water, you can choose between the Grundfos Unilift KP 150, the Grundfos Unilift KP 250, and the Grundfos Unilift KP 350, each having the following specifications:

• Grundfos Unilift KP 150 (8,000 l/h / 5.5m delivery head)
• Grundfos Unilift KP 250 (11,000 l/h / 7.5m delivery head)
• Grundfos Unilift KP 350 (14,000 l/h / 9m delivery head)

In addition, the Unilift KP series comprises a variety of models:

• M – without a float (switches on/off when it is connected to/disconnected from the mains)
• A1 – with a float (switches on/off automatically based on the water level)
• AV1 – with a vertical float (switches on/off automatically based on a low water level)

Applications

This widely applicable Grundfos submersible pump can be used for a variety of pumping jobs in and around the house and business premises:

• Water and rainwater in the agricultural sector
• Water from rivers and lakes
• Rain, drainage, and flood water
• Water to fill/empty containers, ponds, tanks, etc.
• Water from showers, washing machines and sinks below sewer level
• Swimming pool water
• Ditch drainage water
• Groundwater (reduction)
• Effluent from septic and treatment systems from houses
• Effluent from viaducts, underpasses, etc.
• Drainage water from sprinkler systems in garages.

Water level

This pump is fitted with a float switch, which means that it switches on/off automatically based on the water level.

• Switches on automatically at a water level of 30 cm
• Switches off automatically at a water level of 15 cm
• In manual mode (fastening/raising the float), this pump drains water to a level of 5 cm

If you are looking for a pump that leaves less water/switches on automatically sooner, you can opt for a submersible puddle pump.

Summary

• Supplied with a non-return valve and a hose socket
• The pump has a 1.25" outlet, to which the hose we supply can be connected directly
• The pump's maximum submersion depth is 7 metres
• A maximum delivery head of 9 metres
• Float for switching the pump on/off automatically based on the water level

Contents of the kit

• Grundfos Unilift KP 350 A1 Submersible Puddle Pump
• Manual

Stainless steel / Inox

In some situations, stainless steel, which is also called Inox steel, can be very handy, and is prescribed in particular with regard to drinking water. Drinking water must remain pure and may not contain corrosive elements, which is the reason that stainless steel is used. Furthermore, a stainless steel pump is also resistant to lime, which tends to stick to surfaces, but is not able to do so with smooth, stainless steel surfaces. Cast iron is usually the counterpart of stainless steel, but these pumps are prone to corroding and are therefore used mainly for irrigation. A final advantage of stainless steel is that it is lighter than cast iron and is therefore easier to move.

Grundfos

Grundfos is one of the largest pump manufacturers in the world. They have managed to obtain a substantial share in the industrial market, and have achieved this by supplying the highest quality products over a period of several decades. As a result, Grundfos pumps are currently used in many installations and situations. Not surprisingly, your central heating system may also be fitted with a Grundfos circulation pump. Grundfos was originally a Danish company but it is now represented in many countries all over the world. In addition to manufacturing central heating pumps and targeting the industrial market, Grundfos also sells several garden and booster pumps, and has a line of very robust, high-quality submersible pumps.

Float for automatic activation / deactivation

This submersible pump is fitted with a float, which ensures that the pump is switched on and off automatically. Each pump has its own variables relating to the level at which the pump switches on or off. Robust wastewater pumps usually have a high level of activation and deactivation. They will start operating relatively late and stop relatively soon, unlike puddle pumps, which switch on sooner and switch off later. Check the pump's specifications for these variables. There are three types of floats: a floating one, which is attached to a cable; a float arm; and an integrated float. The first type needs more space because it may float in any direction, while the float arm needs less space, as it only moves up and down, and generally has higher operational reliability. Finally, there is the internal float, which is integrated in the pump and therefore needs the least space. We see these internal floats mainly in puddle pumps, because they need to operate in small spaces.

Types of water this product can pump

• Clean water
• Rainwater
• Groundwater
• Light polluted water
• Channel water
• Lake water
• River water
• Ditch water - as long as the suction grille does not come into contact with the ground, algae or drab
• Pond water - as long as the suction grille does not come into contact with the ground, algae or drab
• Muddy water
• Salt water
• Faeces / manure pit