Icon |
Command |
Shortcut Key |
Toolbar |
|
WATERDATASTREETTAPS |
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|
Option
|
Description |
Name |
Optional name for this street tap. |
Group |
Refers to a group that the element belongs to. New elements initially belong to a group that was selected as a current group at the time the element was created. Group creation and manipulation is explained in the chapter on groups. |
Y Coordinate (m) |
Street tap coordinate in horizontal direction. |
X Coordinate (m) |
Street tap coordinate in vertical direction. |
Height above NGL (m) |
Height of street tap opening above ground level. |
Option
|
Description |
| Type | One of Standard 15mm, Standard 20mm or Other. When using standard taps, diameter and flow at 10m head will be automatically set to applicable values from Guidelines. |
| Double tap | Select when using double tap installation. |
| Nominal diameter (mm) | Tap nominal diameter in millimetres. Automatically set when using standard tips. |
| Flow at 10m residual head | Flow per tap at 10 metres residual head. Flow at other heads is calculated from this value and square root rule. Automatically set for standard tips. |
| Restrict flow to maximum of | Use to prevent excessive flow through the tap when pressure is high. |
Notes:
There is a high probability of all street taps being opened simultaneously at a certain time of a day. In that situation, the flow is only related to physical characteristics of taps, as specified on this page.
Single Step Analysis, Maximum Demand, should be used to simulate this scenario:
All street taps will be opened simultaneously.
Tap discharges will be calculated using tap properties and available pressure.
When flow restriction is in place, discharge will be reduced to specified value and the program will calculate the required head loss and diameter of orifice plate (washer) which should be installed in the pipework.
This analysis should be used to check available flow on taps and for sizing of pipes in the reticulation.
This analysis should also be performed for mixed street tap - house connection systems. In this case, discharge on street taps will be calculated as explained above, while draw=off due to house connection will be calculated as usual, using average demand and instantaneous peak factor.
Bulk water supply and reservoirs should be designed using the procedure explained in the next topic.
Option
|
Description |
| Number of people supplied | Enter number of people using this tap. |
| Per capita demand (l/day) | Enter per capita demand in litres per day, as per design specs or relevant regulations. |
| Demand pattern | The demand pattern can be typed in, or selected from the file by clicking .... |
Notes:
Tap discharge will be calculated using number of people, per capita demand and pattern for all kinds of hydraulic analysis except for Single Step, Maximum Demand.
See Also: Street Tap Results.