Indirect Water Supply System
Uploaded by
ScribdTranslationsIndirect Water Supply System
Uploaded by
ScribdTranslationsINDIRECT WATER SUPPLY SYSTEM
It is called indirect because the water supply to the
consumption points (sanitary appliances) is not
directly through the pressure of the public network.
It is used when the public drinking water network does not guarantee continuous
service, necessary flow and/or sufficient minimum pressure to supply all the building's
appliances, especially those that are furthest vertically or horizontally from the matrix,
then it is necessary to store it in tanks called cisterns and/or elevated tanks, from
where it is supplied to the buildings' sanitary appliances.
3.-ADVANTAGES AND DISADVANTAGES OF THE INDIRECT SYSTEM.
TO. Advantages:
1. Allows for some water storage.
2. The pressures obtained in the building are more constant, which is very favorable
for the supply of hot water.
B. Disadvantages.
1. It is an expensive system compared to the first one.
2. There is a possibility of water contamination inside the building, either in the cistern
or in the elevated tank.
3.There is a structural stress surcharge within the building.
DIRECT WATER SUPPLY SYSTEM
MIXED WATER SUPPLY SYSTEM
Direct
SystemThis is the system that supplies water to a building directly to each and every one of the sanitary appliances and equipment. It does not have
a cistern or elevated tank.
Its components are:
1. Meter
holder box2. Stopcocks3
. Flow
meter4. General
gate valve5. Supply pipe – feed6
. Branches
Advantages
: Less risk of contamination of internal water supply.
· Low investment cost and low operating cost system.
· Possibility of measuring consumption flow rates more accurately.
Disadvantages
: If the public service is cut off, the water supply service is interrupted. There is no water
storage in case of water supply interruption.
· They usually only supply low-rise buildings (2 to 3 floors).
· Need for large diameters for large installations.
· Possibility that time variations affect supply at
the highest consumption points. If public service pressures decrease, the internal
supply system will be affected.
4.2. Indirect
System4.2.1. Classic or conventionalThe
classic system has two storage tanks, one at the bottom of the building (cistern) and another at the top (elevated tank). With the help of a
pumping system, water is carried from the cistern to the elevated tank, and from there it is supplied by gravity to the entire building.
This system is recommended for buildings whose vertical growth is greater than horizontal growth.
Example:
- The Towers of Limatambo (18 levels)
- The Towers of San Borja (18 levels)
- The Tower of Lima (31 Levels)
It consists of the following parts:
1. Meter box2
. Stopcocks3
. Flow
meter4. General
gate valve5. Adduction
pipe6. Cistern7
. Suction
pipe8. Pumping
equipment9. Discharge pipe10
. Elevated tank11
. Feed pipe12
. Branches
Advantages
: There is a water reserve in case of public service interruption.
· Constant and reasonable pressure at any point in the internal network.
· Eliminates siphonage by separating the internal network from the external one by domestic
reservoirs.· Pressures in hot water networks are more constant.
Disadvantages
: Greater chances of water contamination inside the home. Both tanks should be cleaned every six months
.
· Higher investment costs due to cistern and elevated tank costs.
· Higher operating costs due to the consumption of electrical energy in pumping equipment.
· If there is a prolonged power outage, the service may be affected.
4.2.2. Hydropneumatic SystemThis
is a system that has a storage tank at the bottom of the building (cystem) and from there, with the support of hydropneumatic equipment (1
pumping equipment +
hydropneumatic tank), the entire building is supplied with constant pressure.
This system is recommended for buildings whose horizontal growth is greater than vertical growth.
Example:
- Hospitals- Schools-
ColiseumsIt
has the following equipment:
1. Meter
holder box2. Stopcocks3
. Flow
meter4. General
gate valve5. Adduction
pipe6. Cistern7
. Suction
pipe8. Pumping
equipment9. Discharge pipe10
. Hydropneumatic
tank11. Feed pipe12
. Branches
Advantages:
· Allows for constant pressure.
Disadvantages
: Higher operating and maintenance costs due to electromechanical equipment.
· Easy to become contaminated due to poor handling of the tank.
· Due to lack of electricity, lack of water supply in the building.
· Requires regular maintenance of the taps, due to leaks