Grundfos self-priming pumpIt is a surface pump, usually used to pump water from a well or as part of a domestic waterworks. They have the advantage of being easy to operate and affordable.

Self-priming pumps are primarily used to pump water from Wells, but are also used as pressurization systems in drinking water distribution. They are usually installed as part of a domestic waterworks, but are also suitable for, for example, pool filtration systems.

They fall into a specific category of surface centrifugal pumps. The traditional centrifugal pump must fill the entire pipeline with water before starting, and the self-priming pump has a greater suction, and only needs to fill the pump itself before the first use.

Keep in mind that, by their physical nature, self-priming pumps are not suitable for pumping water from depths greater than 8 meters. Another possible disadvantage is sensitivity to idling, which can cause damage. For this reason, most pumps available on our website are equipped with a dry spin protection feature that disconnects the pump and prevents damage in the event of a water shortage.

How to choose a self-priming pump:

As is the case with other pumps, it is crucial to consider the liquid capacity, the height and distance of the pump:

• Head

• Flow rate

• Suction

It is recommended that you consider dry rotation protection. For some products, there is even thermal protection to prevent the motor from overheating. Regarding the location of the pump, its material (such as stainless steel) or level of protection also have an impact.

How to control the self-priming pump:

Individual pumps usually do not include a control system. When the power is switched on, it always runs at full capacity. For simple applications - such as watering or pool filtration - pumps can be used without further control.

For your own comfort, we recommend getting additional pressure or flow switches (PM1, PM2, HiControl, etc.). The pump then turns on according to the amount of water we use - for example by turning the tap. This solution is particularly suitable for irrigation, where behind the pump there is a section of pipe and a control valve connected to a hose. Pressurizing the hose itself is not advisable, as it is impossible to entangle it.

For domestic water supply, it is appropriate to install pressure switches and pressure vessels on the pump, which actually constitutes a domestic waterworks.

How to install a self-priming pump:

They are usually connected directly to a standard 220V power outlet. Special attention must be paid to the material used in the straw, which must not shrink during the pumping process. If you use a basic garden hose, the water station will create a vacuum during the suction process, which will deform and clog the hose. Therefore, we recommend purchasing a suction hose, which also comes with a suction basket.

Is the self-priming pump equipped with a filter:

No, there's no filtering. To purify dirty water (such as water with leaves or small rocks), we recommend using suction baskets, placed at the end of suction hoses, directly into the well.

The possible location of additional filtering is debatable. This is because the filter on the suction side of the pump causes a loss of power so that the pump may not have enough suction to pump. Simply put: when pumping water from a depth of two meters, placing a filter in the well is not a problem. If the depth is 7 meters, the filter can become a significant obstacle and cannot be pumped at all.

The above content describes how to choose a self-priming pump. How to install self-priming pump? GRUNDFOS Problems with Grundfos self-priming pumps. In addition, Shenzhen Oudejie Technology specializes in the sale of new original imported GRUNDFOS self-priming pumps, and promises to sell products are new original imported, while providing our customers with quotation, selection, product information and other services.