Installing a Submersible Pump in a Well

Based on the water level in the well and its depth, having determined the necessary characteristics of the pump, you have chosen a submersible well or well pump.?Well is preferable, because.?due to its smaller dimensions with the same capabilities, it is more effective when used in a well.?It is up to you to decide which company the pump will be - Grundfos (SP), KSB(UPA), Ebara(BHS), or others, but for wells with a small or medium flow rate, we recommend choosing a pump with a flow rate of no more than 2-3 m3 / hour. The above firms always have a good offer for any requirements.

Installation is best done with two people.?Before installing the pump, you need to dig a trench from the wall of the well to the place of entry into the house, dig out the input and break through the wall of the well at a level slightly above the bottom of the trench. The depth of which should exceed the level of soil freezing for your region by 20 centimeters, the level of freezing is not difficult to find out from water utility workers or local residents who have already performed similar work. (for countries that face freezing).

At the bottom of the trench, there should be no stones, glass fragments, and other hard and sharp objects.?Before laying the pipe, it is necessary to arrange a sand cushion up to 10 cm thick and prepare a sleeve with a diameter slightly larger than the diameter of the pipe.?We install a sleeve about 0.5 m long in the hole in the wall of the well.?

Despite the large selection of materials for plumbing, in this case, it is best to use a polyethylene pipe and fittings of the appropriate diameter - an elbow and a coupling.?Such a system is easy to assemble with only a hacksaw or special pipe shears, a chamfering knife, and strength in the hands, because.?assembly can be carried out even without the use of a pipe wrench.?But the main thing is not even in simple assembly. Still, for ease of disassembly - if it is necessary to repair the pump, it will be possible to go down into the well to the level of the sleeve,?and it is easy to detach the vertical part from the knee and take it out with the pump.?The diameters of the pipe and fittings must correspond to the diameter of the pump outlet; narrowing is undesirable.

Regarding pipe insulation and insulation, we use any of the available materials, the choice is very large because we do not care about heat loss, but about protecting the pipe from possible physical impacts, but the thicker the insulation, the better.?If your pipe is in the freezing zone, then at maximum sub-zero temperatures, no insulation will save you from freezing.?but about protecting the pipe from possible physical influences, the thicker the insulation, the better.?If your pipe is in the freezing zone, then at maximum sub-zero temperatures, no insulation will save you from freezing.?but about protecting the pipe from possible physical influences, the thicker the insulation, the better.?If your pipe is in the freezing zone, then at maximum sub-zero temperatures, no insulation will save you from freezing.

A couple of hours before installation, the pipe, if it is in a coil, should be unwound so that it straightens.?We calculate the distance from the estimated bottom of the pump in the well to the point of rotation of the pipe into the trench and cut off the required size - you cannot do without a tape measure.?The rest of the pipe is laid in a trench, one end is led into the well through the sleeve and pulled out of the well.?You can pull it out by pushing it into the well from the trench, and from the outside pulling the end up with a makeshift hook.

Having laid the pump next to the pipe intended for lowering, you need to unwind the electrical cable along the pipe.?If the pump does not have a built-in non-return valve, it must be installed on the pump using a wrench and investment material, and coupling must also be attached to it.?Having removed the chamfer from the end of the pipe, we attach it to the coupling, and with the help of electrical tape, we wind the cable to the pipe every 0.5 m so that each section sags slightly.?The rest of the cable will go in a trench or through the air to enter the house.

The cable in the trench must be protected by armor, so we cut the cable in front of the pump control box and put it into the armor.?We attach a cable to the pump head through special eyes, with which we will lower the pump into the well.?Now we connect the free end from the pump with the help of a knee to the end stretched through the sleeve from the well

The outside is possible due to the flexibility of the pipe.?We take the pump and on the cable lower it into the well.?When a bent corner is left outside, the person in the trench should pull the pipe back into the trench, and the lowering pump should continue lowering.?As a result, the knee will reach the sleeve and rest against it, and the vertical section will take its calculated position.

In order for the pump not to be next to the wall of the well, the sleeve must protrude into the well for a certain distance.?The cable now needs to be fixed at the top of the well so that the weight of the pump string is transferred to it, and not to the pipe, i.e.?be stretched.?Through the hole in the wall of the well, next to the sleeve, we tighten the cable in the armor using a hook.?Now we will close up the remaining cracks with a solution, and in the sleeve, we will hammer with rags.

If for some reason, installation cannot be carried out from the outside, you will have to descend into the well to the level of the sleeve.?To do this, you can use a reliable ladder - we lower it into the well, for one of the last crossbars we wind up the board and put it on the head of the well so that both ends are securely supported.?We also put on a safety belt or tie the torso with a strong rope and fasten the free end well on the outside.?Having descended into the well to the desired level, we first lower the pump string and then connect the pipes with a corner.?When installing in a well, it is not necessary to pull the pipe out of the trench - it is enough that it barely looks inside.

We insulate the pipe through the free end and bring it into the house, the armored cable in the trench must be laid parallel to the pipe, and we mount the rest of the equipment of our pumping unit in the house.?Now, after the final installation and checking the operation of the system, we fill the trench with a layer of sand about 10 cm, and then with soil.?Do not rush to take out all the excess soil, because.?the soil in the trench will still shrink.

Credits: Mandrichenko E.A. public utility engineer, agrovodcom.ru