A rare summer resident was not bothered by the question of why dirty water comes from the well – unfortunately, this problem is widespread. Often the point here is not only the mistakes made during the drilling, and not the low-quality filters, but also the natural factors independent of you, related to the nature of the soil and the quality of groundwater.
What to do if the water from the well is dirty, and what measures to take to avoid this? How to clean a well with your own hands and minimize the risk of its further contamination? About everything in detail – on this page.
Causes of Siltation of Wells in the Country
The main reason for the contamination of wells in the country is siltation, which leads to a decrease in the rate of flow of water instead of pumped out. Depending on the structure of the well, siltation can occur for various reasons. Wells comes with a straight hole and with a filter.
Wells with a straight hole is simpler to build, and therefore more common. In such wells, the pump can be lowered to the bottom, because “then the wellbore is long and consists of several pipes of the same diameter. Pipes must be joined together by welding or threaded connection.
One of the reasons why dirty water is in the well is its rare use. With low water consumption, the well can quickly silt. What to do when silting a well in this case? It is easy to clean using the same pump that is installed in it. To do this, first, raise the pump to the surface, and then lower it in several steps to the bottom.
Other wells have in their lower part in the aquifer a filter made of two pipes of different diameters connected together with holes drilled in them. There should be a tightly wound wire spiral between the pipes. With such a device of the well, it is impossible to lower the pump to the very bottom, which causes its siltation. The same circumstance makes it difficult to clean the bottom.
The reasons for silting a well can be different – low water consumption, improper installation of the pipe while drilling a well, use of a self-priming (vacuum) pump or vibration pump with upper water intake, the presence of a filter with a diameter less than that of the main pipe.
At low water consumption, siltation occurs due to subsidence of clay, silt, and rust from the pipe at the bottom of the well, which leads to a decrease in the rate of water intake. With frequent water intake and high water consumption, the risk of siltation is significantly reduced.
However, if it is often not possible to pump water from the well, it is recommended to pump more water in the summer. Sometimes you just need to turn on the pump for a while just to clean the system. This allows clay, sludge, and rust to settle to the bottom along with water. Sand in this case (especially clean, without impurities of clay, silt or rust) does not affect the quality of the well.
If the pipe was initially installed incorrectly when drilling a well (not in an aquifer or in a weakly aquifer), the pump will silt very quickly. Such a well is considered an open marriage, which cannot be corrected in any way, and it remains only to drill a new well or to deepen an existing one, which is as difficult as drilling anew.
When using self-priming (vacuum) pumps for water supply, which is used in wells up to 10 m deep, water is taken only from a depth of 8 m. Because of this, small particles gradually settle and accumulate on the bottom, and the bottom also becomes silted. To clean the blockages, you can use the same pump, which is located in the well. First, you need to raise it up, and then gradually lower it to depth, pumping sludge and other garbage with water.
When using a vibrating pump with upper water intake, siltation occurs for the same reason.
If a filter with a smaller diameter than the main pipe is installed at the bottom of the well, it will not be possible to lower the pump to the bottom of the well. As the well operates, such a filter will be filled with various deposits and will pass water poorly. This flaw is best eliminated immediately, even before the construction of the well by making adjustments to its plan.
How to Clean a Well From Sludge With Your Own Hands
There are several ways to clean well and prevent further siltation. There are also special mechanisms and substances for cleaning.
You can use a water compressor, and with it, deposits from sand and silt can be easily removed with a stream of water under pressure. There is an air compressor that is used to remove soft particles, such as sludge. Another way to clean the well from sludge is to blow the pipe along its entire length using a vacuum plug. To clean the well, a so-called explosion is used – an artificially caused short circuit, as a result of which a bottle with gunpowder lowered to the bottom of the well explodes. As a result, the blast wave breaks up the blockage at the bottom of the well, and it is easy to pump it out with the pump along with water.
The blockage can be eliminated with acid, but it must be used with caution since it can damage the filter or even the pipe itself. Therefore, you must strictly adhere to the instructions and observe the proportions of the solution that are indicated in it. Acid must be injected into the borehole at one time and left in the borehole for 2 days, and then pump water to completely clean the bottom.