5.3.3 Mains water pressure boosting
In some countries, boosting from the city
water mains is prohibited. Please follow
local regulations regarding this application.
TM075262
Pos. Description
1 Highest tapping point
2 Pipe hangers and supports
3 Isolating valves
4 Flexible hoses
5 Bypass valve
6
Optional pressure-reducing valve on the inlet
side if the pressure can exceed 8 bar (115
psi).
7
Optional pressure relief valve on the outlet
side if the installation cannot withstand the
outlet pressure.
8
Drip tray. Install the pump on a small stand to
prevent the ventilation holes from being
flooded.
9 Pressure gauge
10 Mains water pipe
5.3.4 Inlet pipe length
The overview below shows the different possible inlet
pipe lengths, depending on the vertical pipe length.
The overview is only intended as a guide.
Inlet pipe length
DN 32 DN 40
H
[m (ft)]
L
[m (ft)]
H
[m (ft)]
L
[m (ft)]
0 (0) 68 (223) 0 (0) 207 (679)
3 (10) 43 (141) 3 (10) 129 (423)
6 (20) 17 (56) 6 (20) 52 (171)
7 (23) 9 (30) 7 (23) 26 (85)
8 (26) 0 (0) 8 (26) 0 (0)
Pre-conditions:
Maximum flow velocity: 1 l/s (16 gpm).
Inside roughness of pipes: 0.01 mm (0.0004 in).
Size
Inside pipe diameter
[mm (in)]
Pressure loss
[mm (psi/ft)]
DN 32 28 (1.1) 0.117 (5/100)
DN 40 35.2 (1.4) 0.0387 (1.6/100)
12
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