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7
3.5.3 Suction from freshwater tank
Fig. 7 Suction from freshwater tank
3.6 Suction pipe length
The overview below shows the different possible
pipe lengths, depending on the vertical pipe length.
The overview is only intended as a guide.
Fig. 8 Suction pipe length
Preconditions:
Maximum flow velocity: 1 l/s (16 gpm)
Inside roughness of pipes: 0.01 mm (0.0004 inch).
TM06 4348 2015
Pos. Description
1 Highest tapping point
2 Pipe hangers
3 Isolating valve
4 Flexible hoses
5 Drain to sewer
6 Foot valve with strainer
7 Freshwater tank
min1
1
2
3
4
7
6
5
TM06 4372 2115
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)
Size
Inside pipe
diameter
Pressure loss
DN 32
28 mm
(1.1 inches)
0.117 m/m
(5 psi/100 ft)
DN 40
35.2 mm
(1.4 inches)
0.0387 m/m
(1.6 psi/100 ft)
H
L
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