Power shower
4
Fig.3
illustrates all the incorrect connections that
must be avoided.
All pipework to the shower unit must be routed
where it remains below the level of water in
the cistern. In the case of horizontal sections
of pipework in lofts, it may be necessary to
fit automatic air vents at high points on the
supplies to remove the possibility of air locks.
For the operation of the shower only, it is
recommended that the cold water storage
cistern is capable of holding at least 114 litres
(25 gallons). Where other hot and cold outlets
are likely to be in use simultaneously, the storage
capacity should be increased to 228 litres (50
gallons) in accordance with BS 6700.
Do ensure compliance with the Water
Regulations/Bylaws.
DO NOT connect to a combination cylinder
unless there is a guaranteed 114 litre cold supply
to the cylinder as the shower can deliver up to
14 litres per minute. It is advisable to check that
Mains supply
Isolating
valve
Cold water cistern
Vent pipe tee
Isolating
valve
Hot supply
Hot water
cylinder
Drain
valve
Other hot water
draw-offs
Alternative
connection
Shower unit
Ring main
25mm min
Isolating spur
(3A fused)
outside bathroom
Dedicated cold supply
10m
max
75mm
min
Isolating
valves
SITE REQUIREMENTS
Water
The installation must be in accordance with
Water Regulations/Bylaws and BS 6700.
For correct operation of this shower unit, both
hot and cold water supplies to the appliance
must be gravity fed, at nominally equal
pressures, from a cold water storage cistern and
a hot water storage cylinder.
The water circuit should be installed so that the
flow is not significantly affected by other taps
and appliances being operated elsewhere on the
premises.
Fig.2
shows a recommended installation where
the hot water supply for the shower is made
via a tee connection on the underside of the
horizontal section of pipework from the cylinder.
Alternatively, the connection can be taken from
the hot supply pipe to other outlets as long as it
is the first draw-off below the ventilation pipe tee.
Fig.2
(Diagrammatic view – not to scale)
