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Water is an important necessity & commodity in all segments of life. In the changing scenario of the increasing cost of water, It has become the utmost important issue.
The conventional system for water supply & distribution is designed just to fulfill the requirement with minimum atomization & pressures.
The increasing cost of the pumps, electricity & manpower to operate any water supply system is compelling us to choose a totally automatic water supply & distribution system. The satisfactory solution, fulfilling the need, is the ‘Hydro-Pneumatic System’. The hydro-pneumatic system provides water automatically at defined pressure & quantities at many locations from single pumping system. This system operates on variety of differential pressures. It operates automatically by sensing the pressure within the preset pressure range.
Hydro-pneumatic systems are used, to supply water at designed pressure & quantity from a single source.
Two types of Hydro-pneumatic systems are commonly used.
In this system, water can be directly supplied to taps from UGWT only. Thus, it eliminates all Over Head Water Tanks. Any pressure can be designed and achieved at each tap, which is not possible in gravity feeding system.
In multi-building complexes, water can be directly supplied to all overhead water tanks through a ring main, connected to them from UGWT with H.P.system (Refer sketch)
This system, if designed properly for total automation; can reduce the maintenance cost & problems arising due to frequent maintenance.
Consider a building consisting 2 BHK flats having 4 flats on each floor and having 11 stories. Total number of flats = 44 Nos
Total number of toilets = 88 Nos.
A Table showing the calculations of total required LPM for the considered building is as follows.
|Sr.No.||Fixture||Type of control||Fixture units (lpm)||Number of fixtures||Total (lpm)|
|1.||Master toilet||Flush tank||6||44||264|
|2.||Common toilet||Flush tank||6||44||264|
|5.||½” hose connection||Faucet||4||88||352|
|Total in lpm||1144|
The suitable pump capacity, for this LPM and for the desired pressure, and also considering the pressure losses; is chosen. A additional stand by pump of suitable capacity is also suggested.