Deep well pump: features and selection criteria

If you want to have free water on your own site in any quantity, then you should start by drilling the mine to the aquifer. The second step will be the installation of a submersible pump in the well. It is the proper operation of such equipment that will guarantee high-quality watering of garden plants, the continuous functioning of washing and dishwashers, the bathroom and the bathroom.

Submersible pumps for wells have different capacities, sizes and other parameters. In this article we will consider the main selection criteria. The installation of optimal equipment will relieve you of many problems in the future and will give confidence in the constant availability of N₂About on your site.

General provisions

In order to successfully pump out water from wells, wells or other reservoirs, there are the following types of pumps:

• Self-priming. Such equipment is installed on the surface and sometimes has the appearance of a complete pumping station. Not bad cope with sandy wells, which have a relatively small depth.

• Submersible. They have a large capacity, the volume of pumped fluid and the height of the pressure column. Structurally capable of penetrating even very narrow mines. Ideal for artesian wells.

Selection and installation

Since the well pump is the best for wells, we turn to the rules for its selection. To do this, first of all it is necessary to determine where the water supply is required and in what quantity.

Correct criteria

1. Pump performance. The amount of fluid that he can overtake in one hour.

1. Head height. The force of the push of a fluid is selected in accordance with the depth of the shaft and its remoteness from the house.

1. Debit well. The real volume of water that can be provided by the aquifer per hour of continuous flow.

In this regard, you should proceed to the selection of pumping equipment after you have finished drilling a well and will provide a technical passport with all the necessary data.

It should contain:

• The diameter of the mine. From what will depend on the diameter of the submersible apparatus.
• Static and dynamic water levels. The first is formed in the case of idle construction, and the second - with its active use.

• The productive capacity of the well, which is measured by the number of transferred cubic meters of fluid per hour.
• The depth of the mine. Significantly affects the required head height.

Acquiring too powerful a submersible pump should not be for two reasons:

1. Its price will be much higher, but why overpay?
2. If its productivity is greater than the productivity of the well, then it will not have time to fill with water. Because of what will follow the work of the "dry" course, which in the absence of special protection will lead to a burnout of the engine.

Advice: it is recommended to select the device in such a way that its possible consumption is 15% less than the flow rate of the well.

Thus, we now know that the maximum power should not exceed the amount of water inflow. What affects the minimum?

Let's consider:

1. The size of your family. An average adult needs about 1000 liters per day. Multiply this number by the number of permanent residents, and you will know the daily water need of your house.

1. The presence and area of ​​the garden. On watering crops usually takes up to 2000 liters of the necessary fluid.

1. The number of simultaneously used points of consumption. Here is a sample list of their standard consumption, measured in m.³/hour:
2. car wash - 0.7;
3. bathroom - 1,2;
4. bidet - 0.3;
5. shower - 0.8;
6. dish washing machine - 0.6;
7. washstand - 0.3;
8. washing machine - 0.8;
9. WC - 0.4

So, in order to start the washing machine and fill the bath at the same time, you will need equipment with a capacity of at least 2000 m³/hour. But do not forget that there may be a need at this time also to wash the dishes and go to the toilet.

In addition to the power that we choose based on the capabilities of the well and the needs of the residents, it is also important to choose the correct head height, which will require fluid supply.

Calculations are performed as follows:

• Take the height of the house and add to it 6 meters.
• The resulting amount is multiplied by the coefficient of pressure loss in the process of moving through the pipeline. It is equal to 1.15.
• Now add the depth of the mine to the surface of the water mirror. We take this value from the technical passport provided by the drilling company.
• Further, one should take into account the distance of the well from the building that needs water supply. In this case, it is assumed that 10 m horizontally equals 1 m vertically.

Suppose that the height of your house is 7 m, the depth of the mine is 30 m, and the distance from the water intake points is 20 m. We substitute: (7 + 6) * 1.15 + 30 + 2 = 46.95. That is, a pump is required, the height of which is not less than 47 m.

The most important is the calculation of the height of the water supply than the power of the pump. Since it is rare when all points of water consumption are open, but miscalculation with pressure can lead to a complete absence of H₂About in the plumbing system.

Tip: in case of the possibility of an error in calculating the performance of the equipment, it is recommended to install a membrane tank. With it, it will be possible to set the pressure level, which will avoid water hammering together with frequent switching on and off of the engine.

Installation

How to install a submersible pump in the well? To do this, you will need the device itself, a metal-plastic pipe of the required length, an adapter, a steel cable and an electric cable with waterproofing.

Installation instructions are as follows:

1. We fasten a special nipple to the outlet of the pump, sealing the connection with the help of a "winding". It will serve as an adapter for casing threads.

Tip: as a "winding" is recommended to use flax coated with silicone. So you will achieve maximum sealing, quietly withstand possible water hammer.

1. Before fixation, the polyethylene pipe is leveled with your own hands. This will allow the device to be lowered more evenly.

Tip: The diameter of the casing is recommended to choose at least 32 mm to avoid restrictions in the pressure of the water supply.

1. Connect the power cable. In this case, it is required to provide waterproofing as best as possible with the help of special corrugations or heat shrinkable tubes.

Tip: when buying equipment, immediately check the presence of the wire. Because usually it is not included in the package and therefore should be purchased separately.

1. We tie a steel cable to the specially designed eyelets located on the pump casing. From above it can be attached to the winch mounted on a tripod. This will facilitate the immersion of the device at a great depth and will immediately answer the question of how to get the deep-well pump out of the well for maintenance.
2. Now the pipe, cable and cable are tightly connected to each other with special clamps so that you get one solid track.

1. We lower the unit. Places where it clings to the wall, gently overcome rotational movements.

1. We fix the position of the pump below the dynamic water level, but at a height of at least one meter from the bottom. This will prevent sand and other small particles from being sucked into the system.
2. From above, we install a knee that guides the pipe in the direction of the house and hermetically close the shaft to prevent oxygen and precipitation from entering it, which contribute to the corrosion process.

1. To the building we dig a trench with a depth below the ground freezing. Depending on the region, it can vary from fifty centimeters to one and a half meters.
2. We connect to the water supply system at home and use clean and free water from the well.

Conclusion

To drill a well does not mean to supply the house with water. An equally important step is the correct choice and installation of a submersible pump.

When choosing the power of the apparatus, one should take into account the number of residents, the need for watering the garden, possible water intake points and production capacities of the well itself. In addition to this parameter, the accuracy of calculating the required head height, which comes from the height of the house, the distance from it to the mine and its depth, is also important.

Installation work is not difficult, if you follow the recommendations, and quite doable on their own. It is important to make the correct route of the power cable, plastic pipe, steel cable and carefully immerse the equipment.

The video in this article will introduce you to more information.

Correctly choose the necessary equipment!