Mira elite 2 Installation, Operation, Maintenance Manual page 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
15 mm Pipe
22 mm Pipe
15 mm Elbow
22 mm Elbow
Example! Based on the diagram Figure X with 15 mm pipework and A = 1.5 m,
B = 0.75 m.
Size
15 mm Pipe
22 mm Pipe
15 mm Elbow
22 mm Elbow
14
Quantity
(A) + (B)
(A) + (B)
No. Elbows
No. Elbows
Quantity
(A) + (B)
0.75
1.5
(A) + (B)
No. Elbows
1
No. Elbows
x 120
x 20
x 55
x 15
Minimum Effective
Head
(x) mm
x 120
2.25
x 20
x 55
1
x 15
Minimum Effective
Head
(x) mm
Head Loss (mm)
80
Head Loss (mm)
270
55
80
405