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.
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.
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.