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Choosing the right transfer water pump. ☑ Checklist.

Updated: Apr 3, 2023

The organization of water supply and wastewater disposal in private homes and facilities not connected to the centralized network requires the right approach to the selection of equipment. Foras offers pump models with different technical possibilities and design features. But how to choose the right one?


What are Pumps Used For?

Pumps are able to work with clean and dirty water with a certain amount of solid particles. They are used in different areas of economic activity:

  1. in construction;

  2. in mining;

  3. in processing industries;

  4. in agricultural enterprises;

  5. in small farms;

  6. in housing;

  7. in communal services;

  8. In private country houses, etc.


Types Of Pumps.

SUBMERSIBLE PUMPS

SURFACE PUMPS

The unit is completely or partially lowered into the pumped medium. The water is sucked in through the inlet opening in the bottom of the pump housing, which is covered by a strainer. The electric motors of the submersible models are reliably protected against liquids and impurities. The pumps are available in a sealed casing, can be used in wells, boreholes and mines dozens of meters deep.


A distinctive feature of submersible devices for pumping water is a float switch. It does not allow the electric motor to start if the liquid level is below the limit mark. Protection against «dry» running significantly extends the service life of dewatering pumps.*



The devices are used for pumping water from open sources: reservoirs, ponds. It is installed on the edge of the well on a special platform, the suction hose is lowered down. The design can be permanently mounted for permanent use or remain portable. The pump draws in water but does not come into direct contact with it. This reduces the insulation requirements of the housing. The power of the pumps is sufficient for suction from considerable depths.

Scope of application of submersible models:

  • organization of drinking water supply;

  • Irrigation and watering with intake from a well / well;

  • drainage of basements and flooded areas over a large area.

Application areas of the units:

  • organization of irrigation and irrigation in suburban areas with the intake from an open source (barrel, pond, river);

  • drainage of cellars at great depths of flooding;

  • firefighting;

  • pumping water from swimming pools, storage tanks, etc.

*For stationary installation, the submersible pump should be lowered as low as possible to the bottom so that if the water level drops, the protection system will not be triggered. The units are operated for several months without being brought to the surface.



What If The Water Is Dirty?

When pumping media contaminated with solids or fibers, special equipment is used. For such conditions, Foras offers a whole line of pumps.

Household drainage pumps.

Sewage and drainage and fecal.

Sufficiently light, compact medium-power devices in durable plastic housing. Such pumps can be transferred from one place to another, which makes them popular not only among homeowners, but also with various repair and construction organizations. The equipment copes with pumping liquids with small solid and fibrous inclusions (sand, silt).

Pumps of this type allow pumping out water with large solid particles: chips, leaves, hair, other debris contained in drains. Structurally, these are the same drainage devices, but with higher technical and operational characteristics. A cutting wheel is installed in the pump's body. It grinds feces and other large impurities. Equipment of this type is used where the capabilities of simple drainage models are not enough.

Some pump components come into direct contact with the pumped medium. They are made of corrosion-resistant steel or cast iron.

Scope of application of domestic drainage pumps:

  • pumping of surface and groundwater;

  • drainage of basements;

  • drainage of open swimming pools, etc.

The scope of application of sewage pumps:

  • pumping domestic wastewater;

  • cleaning of drainage wells;

  • removal of sewage with high sand and sludge content.


Checklist for choosing the right pump.

In order for the equipment to work effectively in a particular environment, several important parameters must be determined before purchase.

1) Device type.

The choice of surface or submersible unit depends on the water level in the source. For example, for wells and drilled wells with drinking water, where the liquid level drops below 3-5 m, a submersible model is chosen. A surface pump is needed when the source is shallow. The possibility of stable self-priming according to physical laws is not lower than 8 m.


2) Characteristics of pumped water.

Characteristics of the pumped water.

Any pump will work with clean fresh water. If there are fibrous and solid particles in the pumped medium, pay attention to the characteristics of the pump. For each model, the concentration and maximum size of inclusions in water are indicated. If there is a risk of sand getting into the structure of the unit, give preference to submersible models - surface models are more sensitive to cleanliness. For saline and saltwater and use pumps made of corrosion-resistant materials with special seals


3) Medium temperature.

Most pumps are designed for supplying cold water and pumping wastewater. Temperatures above +40 °C are considered critical for these models. When using the pump at low temperatures or for pumping hot water, stainless steel pumps with bronze impellers and special seals should be used.


4) Productivity.

Before choosing a pump, you should evaluate the level of water consumption on the site. If it is a cottage or a house with several tenants, the maximum power will be required only during peak hours in the morning and evening. In this case, you do not need to overpay for a high-performance pump, the device is enough for 120 l / min. To meet the needs of an enterprise, an office building, or an apartment building in drinking water, more powerful devices with a supply of 240 l / min are chosen. For the long-term operation of the water pump, the range of 30-70% should be selected according to the performance.


5) Connecting to electricity.

There are pumps that are sufficient power from a household outlet, and some will require a three-phase connection. If you plan to use the unit all the time, electricians recommend in any case to allocate for it a separate branch in the electrical wiring. This will reduce the likelihood of overload at the start of the pump, will protect other connected equipment from unwanted breakdowns and short circuits.


Now you know how to determine which pump is right for you. Subscribe to our newsletter and share this article with your friends on social networks.

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