What pump is needed to supply water from the well to the house
Hello.
It is necessary to make water supply at home from the well. Depth 5 m, house on stilts +1 m. Boiler Stibel 80 l, 2 people. I can’t figure it out, should I put a conventional centrifugal pump with a hydraulic accumulator or a pump station? Standard consumption: kitchen (dishwasher, sink), bathroom (shower, sink, toilet, bidet).
Thank.
Vadim
Expert Answer
Good afternoon, Vadim.
Conventional centrifugal pumps such as BTsN are not suitable for assembling a makeshift pumping station. The fact is that such units are not designed to pump water into the accumulator (GA) under the necessary pressure. Filling the tank to a certain limit, the pump will simply begin to work "on its own". The pressure will not be enough for water supply at home, so this option should not even be considered. But multistage submersible centrifugal pumps can cope with this task without difficulty. In addition, screw and vibration models can be used in the home water supply system - it all depends on how much you are willing to spend on the construction of the water supply.
Regarding the choice of “finished station or assembly from the accumulator and pump”, then any of these options will suit you. Even inexpensive models are designed for lifting water from a depth of 8 m, not to mention devices with an ejector. The main selection criterion is where you plan to install the pumping station. If in the pit next to the well, then the suction power of the NS will be enough to raise the water to the required height. In the case when the installation will be located in the basement or in the house itself, an ejection pump station or a submersible (deep) unit that works in conjunction with a hydraulic accumulator should be used.
Before proceeding with the selection of a specific centrifugal pump model, calculate the minimum required head. When determining its value, it is necessary to take into account:
- lifting height from the water mirror to the accumulator;
- the length of the highway between the well and the house;
- water pressure in GA.
The first value is not difficult to find - it is enough to add the well depth and the distance from the level of the site to the accumulator (in your case 5 m + 1 m, if the GA is on the floor). As for the second value, then every 10 m of the horizontal line have the same hydraulic resistance as 1 m of the vertical section. So, if the water source is 40 m away from the residential building, then the required pressure should be increased by 4 m. All that remains is to calculate the pressure needed to create the necessary pressure in the system. As you know, to raise water to a height of 10 m, a pressure of 1 atm is required. Therefore, all that needs to be done is to multiply by 10 the maximum reading that you want to see on the manometer of the water supply system.If we take the example considered by us, then for a standardly tuned hydraulic accumulator (maximum pressure 3 atm), you will need a pump with a pressure of 40 m (6 m + 4 m + 30 m). That's all you need to know to build a reliable and durable water supply system for your own home.
