DIY well pump connection

To ensure stable pressure in the water supply system, a pumping station is used. Its main working units are a discharge unit, a hydraulic accumulator, relays and automation for controlling equipment. Do-it-yourself connection of downhole pumps can be done according to a one-pipe or two-pipe scheme. The option is selected depending on the depth of the source.

What type of connection to choose

Two types of pumping stations are divided:

• Single tube. The simplest one, since water is supplied here in a single line, first to the pump housing, then to the accumulator and from it to the main line.
• Two-pipe. The fluid is supplied in a more complex way. Water circulates in a circle during the operation of the station. There is a vacuum that creates the impeller of the discharge unit. It is further increased by the inertia of moving water. Two-pipe surface stations have less power, but are able to lift liquid from a depth of 18-20 m.

The connection option is selected depending on the depth of the well / well:

• with an indicator of up to 10 meters, a single-pipe connection is optimal;
• at a depth of 10-20, a two-pipe scheme is used;
• if the well is long, put a submersible submersible pump.

The type of connection of the station is determined before the purchase of equipment. This allows you to purchase the right amount of consumables.

Steps for connecting a surface and submersible pump

The one-pipe scheme for connecting the pump to the well with your own hands (surface pump) looks like this:

1. The unit is installed in a prepared room (caisson, basement). Securely fix it to the base with anchor bolts.
2. A water intake hose is brought to the pump inlet using a fitting. It is necessary to calculate its length so that the end of the pipe does not reach about 1 meter to the bottom of the source. A coarse filter is put on the end of the hose.
3. Install the accumulator and connect it with a pipe to the pump. Before each entrance to the water intake equipment (for the pump and the membrane tank), check valves are mounted. They prevent backflow of water and incorrect operation of the station.
4. The main pipeline is diverted from the diaphragm tank and a check valve is also placed on it a meter from the outlet pipe.

Before starting the system and setting up automation, water is poured into the technical hole of the membrane tank and pump. Their dry inclusion (at idle) is prohibited.

Mounting a twin-tube pump

If the installation of an ejector station is provided, the work is performed as follows:

• Collect the ejector. A coarse strainer is installed in its lower part.
• A plastic bell is mounted at the top of the ejector. Later, a 3.2 cm diameter drift is fixed to it. It is possible that it will be necessary to put several fittings in a row until the master reaches the desired diameter of the water pipe. The finishing element of the upper structure is a coupling (preferably made of bronze), which provides a transition to a water intake hose. When docking threaded elements, it is better to use seals: rubber gaskets, fum tape, linen winding, etc.).
• Lay the outer pipeline and select the desired length of the hose, which is later lowered into the well. Its length is calculated by adding the distances from the location of the ejector in the source shaft to the tip and from the top of the casing to the pump.The hose is joined with the ejector.
• The intake pipe is lowered to the desired level of the hydraulic structure.
• It remains to connect a pump to it, and then a hydraulic accumulator to the unit.

Start the station after pre-filling it with water.

Installation of equipment with a submersible pump

If the well is very deep, water will have to be pumped by a deep unit. Station installation diagram:

1. On the surface of the earth stretch the intake hose of the desired length. It should correspond to the length of the entire well shaft, taking into account that the pump is located in the source a meter from the bottom.
2. Using fittings, the pipe is attached to the inlet pipe.
3. In parallel with the hose, an electric cable and a safety cable are laid. So that they do not twist and sag in the well, they are pulled together with construction clamps in increments of 1 m. The ends of the clips are cut off.
4. In the caisson or basement, a membrane tank and a control unit are installed.
5. The pump is lowered into the well, and the second end of the pipe is connected to the accumulator. Be sure to put on the check valve.
6. From the drive pull the main water supply line.

The water supply hose from the well can be withdrawn through an adapter or tip.

Connecting the station to the water supply

This technique is often used in cases where the pressure in the line is too low and it is necessary to stabilize it. The work is performed as follows:

1. At the proposed insertion point of the pumping station, the pipe is disconnected. Water from the system is pre-drained.
2. One end of the line from which water enters the mains is connected to the membrane tank.
3. A pump is connected to the outlet pipe of the accumulator and a second pipe section is already brought to it, through which water enters the house.

It remains to let the electrician down and set up the equipment.

Check pump operation

In order for the pump station to work in automatic mode with normal on / off cycles, it is important to check the tightness of all connections and adjust the working pressure of the membrane tank. Before starting the equipment, the pump cavities and the accumulator must be filled with water.

After the start of operation, the stations monitor at what pressure indicators the equipment turns on and off. The optimal low for inclusion is considered to be 1.5-1.8 bar. A good upper for turning off is a figure of 3-3.5 bar. If the master notes the discrepancy between the actual indicators, you need to adjust them. To do this, open the relay cover and turn the screw marked "DR" (indicator of shutdown) in the direction of + or -. These symbols indicate an increase or decrease in atmospheres, respectively. The adjustment of the switching pressure is carried out using the screw indicated by the letter "P".

A properly assembled and connected station works cyclically, does not show leaks. If the master did everything right, you can backfill the external water supply. It is advisable not to tamp the soil. It is gradually poured after subsidence.