Table of Contents
Advertisement
operation. The tone of the pump motor may change when the temperature
control knob is adjusted. This is quite normal.
1.12 Use a minimum of 15 mm diameter supply pipework. It should be noted,
however, that on long pipe runs this should be increased to 22 mm (refer to
section 'Pipework' for guidance). When using flexible plastic pipe it is essential
that the pipe is kept flat and not looped up at any point as this may lead to air
build up.
1.13 Long pipe runs and excessive use of 90° elbows will significantly reduce the
available head to supply the shower. The pipework table should be completed
to ensure that adequate head is available for any given application.
Pipework
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.
Plumbing Schematic Diagram
Example! The example below is based on the diagram above with 15 mm pipework,
A = 1.5 m, B = 0.75 m.
Size
15 mm Pipe
22 mm Pipe
15 mm Elbow
22 mm Elbow
X
Quantity
(A) 1.5 + (B) 0.75 = 2.25 x 120
(A)
+ (B)
Number or Elbows
Number or Elbows
Minimum Effective Head
(x) mm
A
=
x 20
1
x 55
x 15
11
Free flowing
isolator valve
B
Head Loss
(mm)
270
55
80
405
Advertisement
Table of Contents
