Page 10 - Building services book
P. 10
Method Characteristic Advantages Disadvantages
Gravity This system is used when water Pump is not required, If supplied area is located lower than
treatment plant is located at higher therefore, operational cost in water treatment pant, pressure in the
level than supply area. terms of electrical pipe becomes too high and easily
consumption and pump damages pipe and distribution system
maintenance is low.
Pump This system is used when supply Ability to supply water to -Water supply is interrupted when
area is located at the same or higher ground areas. there is interruption in the electricity
higher level than storage tank. supply.
Water is directly pumped to -High pressure during low demand
distribution area. period (at night) and can cause
damage.
- This system requires control and
frequent maintenance services to
ensure optimum level of water supply.
- High operational cost to maintain
pump and distribution system.
Pump and Some amount of water is pumped Very economical because There is no obvious disadvantages.
reservoir to supply area and remaining is pumping process operates at
supplied to service tank, which is fixed rate. Pump which
located at a higher level than operates at fixed rate is highly
supply area. Water stored in service efficient and requires less
tank is distributed during high maintenance. Damage in pipe
demand at peak hours. During low and distribution system can
demand period (at night), water is be reduced.
stored in service tank to be
distributed during peak hour the
following day.
