14
The dimension (x) is calculated from the table below to give you a minimum effective
head of 80 mm which is necessary to produce a satisfactory shower in all conditions.
Pipework
Size
Quantity
Head Loss (mm)
15 mm Pipe
22 mm Pipe
15 mm Elbow
22 mm Elbow
(A)
+ (B)
(A)
+ (B)
No.
Elbows
No.
Elbows
x 120
x 20
x 55
x 15
80
Minimum Effective
Head
(x) mm
Size
Quantity
Head Loss (mm)
15 mm Pipe
22 mm Pipe
15 mm Elbow
22 mm Elbow
(A)
+ (B)
(A)
+ (B)
No.
Elbows
No.
Elbows
x 120
x 20
x 55
x 15
80
Minimum Effective
Head
(x) mm
Example!
Based on the diagram Figure X with 15 mm pipework and A = 1.5 m,
B = 0.75 m.
1.5
0.75
2.25
270
1
1
55
405
