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Sanitary technical data /

RECOMMENDATIONS FOR CONNECTION PIPE DIAMETER

To simplify your work, here are DELABIE's recommendations for selecting the correct internal diameter for horizontal final pipework (table 1).
These diameters are calculated according to the base flow rates recommended by DELABIE for each point-of-use as well as the simultaneous
coefficient calculated following the rules detailed in the previous chapter.
For pipes that are joined or connected using other types of quick connectors, the interior diameter of the passage through the connection
should be verified.

Important: after choosing the diameter, check whether the residual dynamic pressure is sufficient at the valve inlets.
Loss of pressure in the installation should also be considered.

TABLE 1 / PIPEWORK DIAMETER RELATIVE TO THE NUMBER OF TIME FLOW OR ELECTRONIC VALVES
Horizontal pipe runs - Design velocity 2 m/sec.

Time flow Number of valves supplied FLOW RATE PIPE
or electronic valve on the same pipe run Gross flow rate Design corrected Minimum interior diameter
L/sec. L/sec.
1 0.05 0.05 6
2 or 3 0.10 to 0.15 0.08 7
4 to 6 0.20 to 0.30 0.09 to 0.11 8

7 to 11 0.35 to 0.55 0.11 to 0.14 9

12 to 17 0.60 to 0.85 0.14 to 0.17 10
BASIN 18 to 25 0.90 to 1.25 0.17 to 0.20 11
Base flow rate 0.05 L/sec.
26 to 36 1.30 to 1.80 0.21 to 0.24 12
37 to 50 1.85 to 2.50 0.25 to 0.29 13
1 0.10 0.10 8
2 or 3 0.20 to 0.30 0.16 to 0.17 10
4 or 5 0.40 to 0.50 0.18 to 0.20 11
6 to 8 0.60 to 0.80 0.21 to 0.24 12
SHOWER 9 to 15 0.90 to 1.50 0.25 to 0.32 13 to 14
Base flow rate 0.10 L/sec.
16 to 27 1.60 to 2.70 0.33 to 0.42 15 to 16
28 to 50 2.80 to 5 0.43 to 0.57 17 to 19
1 0.15 0.15 10
2 to 4 0.3 to 0.60 0.24 to 0.28 12 to 13
5 to 8 0.75 to 1.20 0.30 to 0.36 14 to 15
9 to 14 1.35 to 2.10 0.38 to 0.47 16 to 17
15 to 23 2.25 to 3.45 0.48 to 0.59 18 to 19
URINAL
With water nozzle and stall 24 to 35 3.60 to 5.25 0.60 to 0.72 20 to 21
Flow rate 0.15 L/sec.
36 to 50 5.40 to 7.50 0.73 to 0.86 22 to 23
1 0.25 0.25 13
2 or 3 0.50 to 0.75 0.40 to 0.42 16
4 to 7 1 to 1.75 0.46 to 0.57 17 to 19
SIPHON ACTION URINAL
With small independent plastic 8 to 14 2 to 3.50 0.60 to 0.78 20 to 22
or ceramic waste
Base flow rate 0.25 L/sec. 15 to 25 3.75 to 6.25 0.80 to 1.02 23 to 25
26 to 34 6.50 to 8.50 1.04 to 1.18 26 to 27
35 to 50 8.75 to 12.50 1.20 to 1.43 28 to 30
1 1 1 20
2 or 3 2 to 3 1 25
4 to 12 4 to 12 2 36
13 to 24 13 to 24 3 44
DIRECT FLUSH WC
¾" to 1¼" 25 to 50 25 to 50 4 50
Base flow rate 1 L/sec.
+50 +50 5 56

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