Feeling the need for this tool to pump water under different conditions and applications, we were encouraged to develop this project. A manual, lightweight pump, adaptable in numerous situations, easy to build and low cost.

Watch out
Physics dictates the suction limits of liquids to be pumped vertically on the surface of this planet. This phenomenon is called "Cavitation". For the Water Tank Float Valves this is a very important matter.

Theoretically, for water, this value is 10.33m of water column, in the so-called normal conditions of pressure and temperature, or CNPT, equivalent to a height of zero meters - sea level and at a temperature of 0 (zero) ° C. The reason is simple: in the act of pulling water from the bottom of the well upwards, there is a certain height, relative to the level of that water, from which it is no longer possible to raise the water. Are the 10.33m mentioned above.

At this point, inside the barrel, there is a negative pressure (a vacuum) equivalent to the weight of the water column, which is so intense that water evaporation naturally begins, a phenomenon also known as "column breakdown". When the break happens, the water does not fall, returning to the well. Simply the column is stopped at this point and does not go up. In practice, in the well where we want to remove the water, due to its height above the sea, the ambient temperature, the vibrations of the pump and others, it is difficult to raise water by suction, more than 6, 7 or 8m.

Note: A water column of 10.33 m (the CNTP) corresponds to a hydraulic pressure of 1 bar (= 0.987 atm (atmospheres)).

To raise water by suctioning more or less 6m from the water surface of the well / reservoir, you have to put another pump in series with the 1st pump. This will give you 6m, plus the height that the 1st pump can push (depending on the power of that pump), and from then on, you can put the pump (s) in series, receiving the water and pushing it to above, and so can raise the water by hundreds of meters above. This is where you would need the use of Water Tank Float Valves.

Ideally, to draw water with depths above 6m, while maintaining the low cost, is to use a pump to push (from within a tube) the water column from the bottom of the well to the desired height. See the "Wheel Pump Manual" or "Rope Pump" on the Water Energy website => ROPE MANUAL WATER PUMP - LOW COST PROJECT There are also electric pumps that work submerged inside the well water and with good efficiency for this type of work.

Tip: Use the maximum suction height limit of 6m. And the maximum lift height that the pump supports without degrading the physical structure of the material used, we still do not have enough data, but consider the 6m as a limit; more than just testing.

About the Company: In New Zealand, Jobe Valves happens to be a champion among the most clearly fathomed affiliations offering a wide assembling of water valves. The probability of their things being impeccable in each sense, their notoriety is climbing all around inquired.