6
Maximum and minimum pipe length
Key
Description
Minimum
Maximum
H1 in
From gully to vertical lift
0.1 m
3 m
V in
Vertical from floor to level of pump
0.15 m
0.5 m
H2 in
Inlet distance from vertical to pump
0.1 m
H1 out
From outlet to vertical rise
0.2 m
0.4 m
V out
Vertical head
0 m
2.5 m
H2 out
Horizontal to waste pipe
*See notes below
*If > 1 metre use 1
1
/
4
” or 1
1
/
2
” waste pipe on gravity fall no maximum if on gravity fall
If < 1 m then 22 mm copper may be used to the stack.
1.4
2.1
Push fit fittings are provided to connect the
pump to inlet and discharge pipework.
For electric shower installations
pipework
from the gulley into the pump must be
15 mm
to give a flow rate of 8 litres/min. (Do not use
22 mm
pipework on the inlet as this will
increase the noise level when pumping).
For mixer shower installations
pipework from
the gulley into the pump must be 22 mm to
give a flow rate of 12 litres/min.
Note: For mixer shower installation an additional
flow switch and fittings are required. Order
Part No. AK1570.
2.2
•
Only one vertical
lift on the inlet to the
pump and the discharge from the pump is
allowed.
• When laying the pipe under the floor use
only slow radius bends.
• Use slow radius bends above the floor if
possible to ease the flow of water and
reduce loading on the pump.
• Use of copper pipe is recommended to
reduce risk of air leaks at connections.
• Ensure edges are burr-free. Burrs may
cause a build up of hair etc. that will reduce
flow.
• Pipework
must
be secured to prevent any
vibration and noise.
•
‘Twist Lock’ the securing ring on the
push fit fittings after the fittings have
been pushed home.
•
If semi rigid pipe is being used follow the
manufacturer’s instructions to prevent air
leaks.
Plumbing Specification
1.5
Plumbing for electric installation shown.
(15mm inlet pipework).
