# How to find the size of the Water Tank

One of the blog followers has asked a question today .

” How do we determine the size of the water tank ? “

Just for updating , we have already seen how to calculate the capacity of the water tank

if the overall size is known to us.

Water tank capacity

So in this article, you shall understand the basic process of finding out the size of the water tank.

Step 01 :

Compile the basic data which include the following factors.

1. No of units or flats to be served by this water tank.( U )

2.Average members per unit ( m )

3.Average water consumption per person per day ( w )

1. Water Storage to be made for how many days ( n )
2. Buffer supply to be maintained in the tank ( x% )

6.free board to be kept ( 250 to300 mm )

7.What could be the area of the water tank ?

( depends on the size of the stair case /Lift room above which the water tank is to be constructed )

Step 02 :

Find out the the capacity of the water tank :

C = n x w x m x U litres

Step 03 ;

Add for the buffer storage in the tank @ 5 %

C1 = 1.05 (  n x w x m x U ) litres

C2 = 1.05 (  n x w x m x U ) litres/1000 =  CuM

Step 04 :

Find out the height of the water in the tank:

h= water capacity in CuM / area of the water tank ( a x b) ,

Step 05 :

Find out total height of the water tank :

H = h + free board

Step 06 :

So now you have the basic internal size of the water tank.

Step 07 :

Find out the out size of the water tank with certain assumptions for RCC wall , RCC base slab

RCC top slab :

Hope this sequence is quite clear to you.

PS :

For those of you , who are not quite clear on these calculations , just wait for the next post where we shall actually take one case study and find out the sizes.

Till then ,

Bye