MODERN EDUCATION AND DEVELOPMENT
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165
CALCULATION OF THE ECONOMIC ROOF OF THE INTERNAL WATER
SUPPLY NETWORK OF THE BUILDING
Ravshanzoda Zaynura
1.a
, Kuvandikov Kuvonchbek
2.b
Tashkent State Transport University, student
1.a
;
Tashkent State Transport University, assistant
2.b
E-mail: quvondiqovqamar@gmail.com
ANNOTATION: This article discusses the basics of economic assessment of
the internal water supply network of a building. In the design of internal engineering
networks, ensuring not only technical, but also economic efficiency is of great
importance. The article analyzes the types of investment and operating costs for the
water supply system, shows their calculation methods and economic efficiency through
practical examples. At the same time, recommendations are given on reducing costs
through the use of resource-saving equipment, the selection of modern pipeline
materials, and monitoring water consumption. The results of this study are of practical
importance for engineers, design organizations, and construction specialists.
Key words: Internal water supply, Water supply network, Building utilities,
Economic efficiency, Cost calculation, Pipe sizing, Hydraulic calculation, Water
consumption, Plumbing system design, Material cost estimation, Installation cost,
Operation and maintenance cost, System optimization, Water flow rate, Pressure loss,
Energy consumptionб Sustainable water systems.
INTRODUCE
The internal water supply system of a building must be properly designed not
only from a technical point of view, but also from an economic efficiency point of
view. Economic calculations help to estimate the cost of the project, select the most
efficient equipment and materials, and reduce long-term operating costs.
MODERN EDUCATION AND DEVELOPMENT
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166
1. Basic expenses types
Internal water supply system for expenses
investment ( one multiple ) and
operational ( periodic )
to expenses is divided into :
Investment expenses :
Pipes (PVC, polypropylene, metal)
Fittings ( valve , faucet , filters )
Sanitary equipment (shower, toilet, sink)
Schyotchiks , valves , welding equipment
Design and installation workforce
Operational expenses :
Water for payment ( water) depending on consumption )
Pump power ( if applicable)
Technical service to show and repair
Losses and water waste control
2. Calculation methods
✅
Water supply system calculate the investment value
Csystem =∑ i = 1n( Cmaterial_i+Cassembly_i )C_{ system } = \sum_{ i
=1}^{n} (C_{material\_ i } + C_{ assembly \_ i }) Csystem = i = 1 ∑ n ( Cmaterial_i
+ Cassembly_i )
This on the ground :
C_{ material_i } – material price for each element ;
C_{ montage_i } – went to the installation expenses .
✅
Promising water expense and t bill of payments ( annual )
Qyear=Qday
⋅
365Q_{ year } = Q_{ day } \ cdot 365 Qyear = Qday
⋅
365
Tsuv=Qyil
⋅
TnarxT_ { water } = Q_{ year } \ cdot T_{ price } Tsuv = Qyil
⋅
Tnarx
This on the ground :
Q_{ daily } – daily water consumption (m³);
T_{ price } – 1 m³ of water price ( for example , 2000 soums );
T_{ water } – annual water for payment .
MODERN EDUCATION AND DEVELOPMENT
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167
3. A practical example ( for example , a 5-story house for )
Information :
20 households in the house ;
Each 150 l/day of water in the apartment expense ;
1 m³ of water price : 2000 sum ;
300 meters of pipe are needed , 1 meter costs 40,000 soums ;
Installation work : 50,000 soum / meter
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168
1. In the building daily water consumption :
- average daily spending :
,
1000
/
)
......
(
.
.
.
.
'
2
2
.
.
'
1
1
.
.
'
.
'
may
yash
tot
may
yash
asf
tot
asf
n
tot
n
kun
r
o
tot
kun
r
o
tot
kun
r
o
tot
kun
r
o
F
q
F
q
U
q
U
q
U
q
Q
m
3
/day
m3/kun
70
.
65
1000
/
)
3500
*
5
.
4
6500
*
5
.
0
10
*
8
90
*
56
5
*
250
5
*
12
113
*
250
(
.
'
tot
kun
r
o
Q
,
1000
/
)
......
(
.
.
.
.
'
2
2
.
.
'
1
1
.
.
'
.
'
may
yash
h
may
yash
asf
h
asf
n
h
n
kun
r
o
h
kun
r
o
h
kun
r
o
h
kun
r
o
F
q
F
q
U
q
U
q
U
q
Q
225
.
15
1000
/
)
8
*
5
90
*
33
5
*
65
5
*
5
113
*
105
(
.
'
h
kun
r
o
Q
m
3
/day
,
1000
/
)
......
(
.
.
.
.
'
2
2
.
.
'
1
1
.
.
'
.
'
may
yash
c
may
yash
asf
c
asf
n
c
n
kun
r
o
c
kun
r
o
c
kun
r
o
c
kun
r
o
F
q
F
q
U
q
U
q
U
q
Q
471
.
50
1000
/
)
3500
*
5
.
4
6500
*
5
.
0
8
*
7
90
*
23
5
*
185
5
*
7
113
*
145
(
.
'
c
kun
r
o
Q
m
3
/day
− maximum daily spending :
MODERN EDUCATION AND DEVELOPMENT
Выпуск журнала №-24
Часть–3_ Апрель –2025
169
,
1000
/
)
......
(
.
.
.
.
max
2
2
.
.
max
1
1
.
.
max
.
max
may
yash
tot
may
yash
asf
tot
asf
n
tot
n
kun
tot
kun
tot
kun
tot
kun
F
q
F
q
U
q
U
q
U
q
Q
m
3
/day
758
.
71
1000
/
)
3500
*
5
.
4
6500
*
5
.
0
8
*
16
90
*
60
5
*
250
5
*
16
113
*
300
(
.
max
tot
kun
Q
,
1000
/
)
......
(
.
.
.
.
max
2
2
.
.
max
1
1
.
.
max
.
max
may
yash
h
may
yash
asf
h
asf
n
h
n
kun
h
kun
h
kun
h
kun
F
q
F
q
U
q
U
q
U
q
Q
m
3
/ day
126
.
17
1000
/
)
8
*
7
90
*
35
5
*
65
5
*
7
113
*
120
(
.
max
h
kun
Q
,
1000
/
)
......
(
.
.
max
2
2
.
.
max
1
1
.
.
max
.
max
n
c
n
kun
c
kun
c
kun
c
kun
U
q
U
q
U
q
Q
m
3
/ day
632
.
56
1000
/
)
3500
*
5
.
4
6500
*
5
.
0
8
*
9
90
*
25
5
*
185
5
*
9
113
*
180
(
.
max
c
kun
Q
Equipment one at the time working The probability of leaving is P following
expression through h is calculated as :
N
q
U
Q
Рс
соат
0
3600
,
this on the ground Q
hours
– the most water spending done on the clock water
amount in liters . It value from QMQ is obtained , table 2.
He is one kind qualitative water consumers general number ;
N – U quantity to consumers service to do sanitary technician equipment
general amount .
One kind qualitative water consumption to do building and from the
structures R value
N
U
ratio value arithmetic in the plots change on account of did not
receive in case acceptance to do It is possible to calculate H. simplification for the
purpose of QMQ from Table 4 use recommendation is being done .
MODERN EDUCATION AND DEVELOPMENT
Выпуск журнала №-24
Часть–3_ Апрель –2025
170
Sanitary technician to the equipment connectable pipes size QMQ from table 1
using designation The building is 60-70 m long . outside square , streets and to the
flower beds water sprinkle for water sprinkle cranes installation condition . From the
taps sprinkled water exit speed 0.9 ÷ 1.2 m/ sec It is between . The buildings internal
in the water supply water leak speed , master in sections 1.5÷2.0 m/ sec on racks and
to the utensils connection in the secret and 2.5 m/ sec until it was .
2. One to the device correct incoming people number per second probably
:
- residence building for :
027
.
0
60
3
,
0
3600
113
6
,
15
3600
1
1
.
.
max
1
1
.
.
'
1
.
.
tot
tot
sek
tot
tot
soat
r
o
tot
sek
ahol
N
q
U
q
Р
035
.
0
45
2
,
0
3600
113
10
3600
1
1
.
.
max
1
1
.
.
'
1
.
.
h
h
sek
h
h
soat
r
o
h
sek
ahol
N
q
U
q
Р
015
.
0
60
2
,
0
3600
113
6
,
5
3600
1
1
.
.
max
1
1
.
.
'
1
.
.
c
c
sek
c
c
soat
r
o
c
sek
ahol
N
q
U
q
Р
- household service indicator objects for :
Pharmacy :
013
.
0
3
14
,
0
3600
5
4
3600
2
2
.
.
max
2
2
.
.
'
2
.
.
tot
tot
sek
tot
tot
soat
r
o
tot
sek
dor
N
q
U
q
Р
014
.
0
2
1
,
0
3600
5
2
3600
2
2
.
.
max
2
2
.
.
'
2
.
.
h
h
sek
h
h
soat
r
o
h
sek
dor
N
q
U
q
Р
009
.
0
3
1
,
0
3600
5
2
3600
1
1
.
.
max
1
1
.
.
'
1
.
.
c
c
sek
c
c
soat
r
o
c
sek
ahol
N
q
U
q
Р
Store :
057
.
0
3
3
,
0
3600
5
37
3600
3
3
.
.
max
3
3
.
.
'
3
.
.
'
tot
tot
sek
tot
tot
soat
r
o
tot
sek
k
do
N
q
U
q
Р
MODERN EDUCATION AND DEVELOPMENT
Выпуск журнала №-24
Часть–3_ Апрель –2025
171
067
.
0
1
2
,
0
3600
5
6
,
9
3600
3
3
.
.
max
3
3
.
.
'
3
.
.
'
h
h
sek
h
h
soat
r
o
h
sek
k
do
N
q
U
q
Р
063
.
0
3
2
,
0
3600
5
4
.
27
3600
3
3
.
.
max
3
3
.
.
'
3
.
.
'
c
c
sek
c
c
soat
r
o
c
sek
k
do
N
q
U
q
Р
Hairdresser :
107
.
0
15
14
,
0
3600
90
9
3600
4
4
.
.
max
4
4
.
.
'
4
.
.
tot
tot
sek
tot
tot
soat
r
o
tot
sek
sar
N
q
U
q
Р
084
.
0
14
1
,
0
3600
90
7
.
4
3600
4
4
.
.
max
4
4
.
.
'
4
.
.
h
h
sek
h
h
soat
r
o
h
sek
sar
N
q
U
q
Р
072
.
0
15
1
,
0
3600
90
3
.
4
3600
4
4
.
.
max
4
4
.
.
'
4
.
.
c
c
sek
c
c
soat
r
o
c
sek
sar
N
q
U
q
Р
Administrative building :
032
.
0
2
14
,
0
3600
8
4
3600
5
5
.
.
max
5
5
.
.
'
5
.
.
'
tot
tot
sek
tot
tot
soat
r
o
tot
sek
m
ma
N
q
U
q
Р
044
.
0
1
1
,
0
3600
8
2
3600
5
5
.
.
max
5
5
.
.
'
5
.
.
'
h
h
sek
h
h
soat
r
o
h
sek
m
ma
N
q
U
q
Р
022
.
0
2
1
,
0
3600
8
2
3600
5
5
.
.
max
5
5
.
.
'
5
.
.
'
c
c
sek
c
c
soat
r
o
c
sek
m
ma
N
q
U
q
Р
− general probably :
042
.
0
2
15
3
3
60
2
032
.
0
15
107
.
0
3
057
.
0
3
013
.
0
60
027
.
0
.....
......
3
2
1
.
3
3
.
2
2
.
1
1
.
.
n
n
tot
n
sek
tot
sek
tot
sek
tot
sek
tot
sek
N
N
N
N
N
Р
N
Р
N
Р
N
Р
Р
MODERN EDUCATION AND DEVELOPMENT
Выпуск журнала №-24
Часть–3_ Апрель –2025
172
046
.
0
1
14
1
2
45
1
044
.
0
14
084
.
0
1
067
.
0
2
014
.
0
45
035
.
0
.....
......
3
2
1
.
3
3
.
2
2
.
1
1
.
.
n
n
h
n
sek
h
sek
h
sek
h
sek
h
sek
N
N
N
N
N
Р
N
Р
N
Р
N
Р
Р
027
.
0
2
15
3
3
60
2
022
.
0
15
072
.
0
3
063
.
0
3
009
.
0
60
015
.
0
.....
......
3
2
1
.
3
3
.
2
2
.
1
1
.
.
n
n
c
n
sek
c
sek
c
sek
c
sek
c
sek
N
N
N
N
N
Р
N
Р
N
Р
N
Р
Р
3. One to the device correct incoming people number hourly probably :
- residence building for :
087
.
0
300
027
.
0
3
.
0
3600
3600
1
.
.
max
1
.
1
.
.
max
1
.
.
tot
soat
tot
sek
tot
sek
tot
soat
ahol
q
P
q
Р
111
.
0
200
035
.
0
2
.
0
3600
3600
1
.
.
max
1
.
1
.
.
max
1
.
.
h
soat
h
sek
h
sek
h
soat
ahol
q
P
q
Р
025
.
0
200
015
.
0
2
.
0
3600
3600
1
.
.
max
1
.
1
.
.
max
1
.
.
c
soat
c
sek
c
sek
c
soat
ahol
q
P
q
Р
- household service indicator objects for :
Pharmacy :
083
.
0
80
013
.
0
14
.
0
3600
3600
1
.
.
max
1
.
1
.
.
max
1
.
.
tot
soat
tot
sek
tot
sek
tot
soat
dor
q
P
q
Р
083
.
0
60
014
.
0
1
.
0
3600
3600
1
.
.
max
1
.
1
.
.
max
1
.
.
h
soat
h
sek
h
sek
h
soat
dor
q
P
q
Р
056
.
0
60
009
.
0
1
.
0
3600
3600
1
.
.
max
1
.
1
.
.
max
1
.
.
c
soat
c
sek
c
sek
c
soat
dor
q
P
q
Р
Store :
206
.
0
300
057
.
0
3
.
0
3600
3600
1
.
.
max
1
.
1
.
.
max
1
.
.
'
tot
soat
tot
sek
tot
sek
tot
soat
k
do
q
P
q
Р
MODERN EDUCATION AND DEVELOPMENT
Выпуск журнала №-24
Часть–3_ Апрель –2025
173
240
.
0
200
067
.
0
2
.
0
3600
3600
1
.
.
max
1
.
1
.
.
max
1
.
.
'
h
soat
h
sek
h
sek
h
soat
k
do
q
P
q
Р
228
.
0
200
063
.
0
2
.
0
3600
3600
1
.
.
max
1
.
1
.
.
max
1
.
.
'
c
soat
c
sek
c
sek
c
soat
k
do
q
P
q
Р
Hairdresser :
9
.
0
60
107
.
0
14
.
0
3600
3600
1
.
.
max
1
.
1
.
.
max
1
.
.
tot
soat
tot
sek
tot
sek
tot
soat
sar
q
P
q
Р
755
.
0
40
084
.
0
1
.
0
3600
3600
1
.
.
max
1
.
1
.
.
max
1
.
.
h
soat
h
sek
h
sek
h
soat
sar
q
P
q
Р
645
.
0
40
072
.
0
1
.
0
3600
3600
1
.
.
max
1
.
1
.
.
max
1
.
.
c
soat
c
sek
c
sek
c
soat
sar
q
P
q
Р
Administrative building :
2
.
0
80
032
.
0
14
.
0
3600
3600
1
1
.
.
max
1
.
1
.
.
max
1
.
.
'
tot
tot
soat
tot
sek
tot
sek
tot
soat
m
ma
N
q
P
q
Р
267
.
0
60
044
.
0
1
.
0
3600
3600
1
.
.
max
1
.
1
.
.
max
1
.
.
'
h
soat
h
sek
h
sek
h
soat
m
ma
q
P
q
Р
133
.
0
60
022
.
0
1
.
0
3600
3600
1
.
.
max
1
.
1
.
.
max
1
.
.
'
c
soat
c
sek
c
sek
c
soat
m
ma
q
P
q
Р
− general probably :
241
.
0
2
15
3
3
60
2
2
.
0
15
9
.
0
3
206
.
0
3
083
.
0
60
087
.
0
.....
......
3
2
1
.
3
3
.
2
2
.
1
1
.
.
n
n
tot
n
soat
tot
soat
tot
soat
tot
soat
tot
soat
N
N
N
N
N
Р
N
Р
N
Р
N
Р
Р
MODERN EDUCATION AND DEVELOPMENT
Выпуск журнала №-24
Часть–3_ Апрель –2025
174
258
.
0
1
14
1
2
45
1
267
.
0
14
755
.
0
1
240
.
0
2
083
.
0
45
111
.
0
.....
......
3
2
1
.
3
3
.
2
2
.
1
1
.
.
n
n
h
n
soat
h
soat
h
soat
h
soat
h
soat
N
N
N
N
N
Р
N
Р
N
Р
N
Р
Р
164
.
0
2
15
3
3
60
2
133
.
0
15
645
.
0
3
228
.
0
3
056
.
0
60
047
.
0
.....
......
3
2
1
.
3
3
.
2
2
.
1
1
.
.
n
n
c
n
soat
c
soat
c
soat
c
soat
c
soat
N
N
N
N
N
Р
N
Р
N
Р
N
Р
Р
4. Various objects there is of the building water consumption average
indicator :
- per second :
234
.
0
2
032
.
0
15
107
.
0
3
057
.
0
3
013
.
0
60
024
.
0
2
032
.
0
14
.
0
15
107
.
0
14
.
0
3
057
.
0
3
.
0
3
013
.
0
14
.
0
60
024
.
0
3
.
0
.....
......
.
3
3
.
2
2
.
1
1
.
.
.
.
max
3
3
.
3
.
.
max
2
2
.
2
.
.
max
1
1
.
1
.
.
max
.
n
tot
n
sek
tot
sek
tot
sek
tot
sek
n
tot
n
sek
tot
n
sek
tot
sek
tot
sek
tot
sek
tot
sek
tot
sek
tot
sek
tot
sek
N
Р
N
Р
N
Р
N
Р
N
Р
q
N
Р
q
N
Р
q
N
Р
q
q
169
.
0
1
044
.
0
14
084
.
0
1
067
.
0
2
014
.
0
45
031
.
0
1
044
.
0
1
.
0
14
084
.
0
1
.
0
1
067
.
0
2
.
0
2
014
.
0
1
.
0
45
031
.
0
2
.
0
.....
......
.
3
3
.
2
2
.
1
1
.
.
.
.
max
3
3
.
3
.
.
max
2
2
.
2
.
.
max
1
1
.
1
.
.
max
.
n
h
n
sek
h
sek
h
sek
h
sek
n
h
n
sek
h
n
sek
h
sek
h
sek
h
sek
h
sek
h
sek
h
sek
h
sek
N
Р
N
Р
N
Р
N
Р
N
Р
q
N
Р
q
N
Р
q
N
Р
q
q
165
.
0
2
022
.
0
15
072
.
0
3
063
.
0
3
009
.
0
60
013
.
0
2
022
.
0
1
.
0
15
072
.
0
1
.
0
3
063
.
0
2
.
0
3
009
.
0
1
.
0
60
013
.
0
2
.
0
.....
......
.
3
3
.
2
2
.
1
1
.
.
.
.
max
3
3
.
3
.
.
max
2
2
.
2
.
.
max
1
1
.
1
.
.
max
.
n
c
n
sek
c
sek
c
sek
c
sek
n
c
n
sek
c
n
sek
c
sek
c
sek
c
sek
c
sek
c
sek
c
sek
c
sek
N
Р
N
Р
N
Р
N
Р
N
Р
q
N
Р
q
N
Р
q
N
Р
q
q
- hourly :
421
.
11
2
200
.
0
15
900
.
0
3
206
.
0
3
083
.
0
60
087
.
0
2
200
.
0
80
15
900
.
0
60
3
206
.
0
300
3
083
.
0
80
60
087
.
0
300
.....
......
.
3
3
.
2
1
.
1
1
.
.
.
.
max
3
3
.
3
.
.
max
2
2
.
2
.
.
max
1
1
.
1
.
.
max
.
n
tot
n
soat
tot
soat
tot
soat
tot
soat
n
tot
n
soat
tot
n
soat
tot
soat
tot
soat
tot
soat
tot
soat
tot
soat
tot
soat
tot
soat
N
Р
N
Р
N
Р
N
Р
N
Р
q
N
Р
q
N
Р
q
N
Р
q
q
MODERN EDUCATION AND DEVELOPMENT
Выпуск журнала №-24
Часть–3_ Апрель –2025
175
331
.
6
1
267
.
0
14
755
.
0
1
024
.
0
2
083
.
0
45
111
.
0
1
267
.
0
60
14
755
.
0
40
1
240
.
0
200
2
083
.
0
60
45
111
.
0
200
.....
......
.
3
3
.
2
1
.
1
1
.
.
.
.
max
3
3
.
3
.
.
max
2
2
.
2
.
.
max
1
1
.
1
.
.
max
.
n
h
n
soat
h
soat
h
soat
h
soat
n
h
n
soat
h
n
soat
h
soat
h
soat
h
soat
h
soat
h
soat
h
soat
h
soat
N
Р
N
Р
N
Р
N
Р
N
Р
q
N
Р
q
N
Р
q
N
Р
q
q
659
.
5
2
133
.
0
15
645
.
0
3
228
.
0
3
056
.
0
60
047
.
0
2
133
.
0
60
15
645
.
0
40
3
228
.
0
200
3
056
.
0
60
60
047
.
0
200
.....
......
.
3
3
.
2
1
.
1
1
.
.
.
.
max
3
3
.
3
.
.
max
2
2
.
2
.
.
max
1
1
.
1
.
.
max
.
n
c
n
soat
c
soat
c
soat
c
soat
n
c
n
soat
c
n
soat
c
soat
c
soat
c
soat
c
soat
c
soat
c
soat
c
soat
N
Р
N
Р
N
Р
N
Р
N
Р
q
N
Р
q
N
Р
q
N
Р
q
q
Calculation:
Daily general consumption
: 150 × 20 = 3000 l = 3 m³
Annual water consumption
: 3 × 365 = 1095 m³
Annual payment
: 1095 × 2000
= 2,190,000 soums
Pipe cost
: 300 × 40,000
= 12,000,000 money
Assembly work
: 300 × 50,000
= 15,000,000 money
Total Cost
: 27,000,000 sum + equipment and fittings ( about 10 million
)
= 37,000,000 sum
4. Economic efficiency increase methods
Event
Economic benefit
Smart water meters
Reduces water loss
MODERN EDUCATION AND DEVELOPMENT
Выпуск журнала №-24
Часть–3_ Апрель –2025
176
Event
Economic benefit
Modern materials (PE, PP-R pipes)
Repair expenses reduces
Water economical sanitary equipment Annual water reduces consumption by 30-40%
Pump timer or with touch control
Electricity costs reduces
Conclusion
The building internal water supply system of economic calculation of
construction costs planning , in operation efficiency increase and water rational use of
resources possible gives . Every For a project , technical and economic aspects must
be assessed together .
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