S
EQUENTIAL
T
HERMOSTATIC
S
HOWER
V
ALVE
Owner’s
Guide
7
UNVENTED MAINS PRESSURE
SHOWERS
The shower valve can be used on an
unvented mains pressure system. This
type of system
must
only be installed
by
a competent person as per the
requirement of Part G of Schedule
1 to the building regulations.
For systems with no cold water take off
after the heaters pressure reducing valve,
an additional pressure reducing valve
must be fitted, and set, at the same
pressure as the heaters.
The water supply pressure to the shower
valve must be between 1 and 4 Bar.
PUMPED SHOWERS
The shower valve can be used on a
gravity fed pumped system. The use of a
Surrey or Essex flange connection to the
hot water cylinder will ensure an
independent supply of hot water to the
valve; this action will stop air being
drawn into the system.
N.B. Please follow pump manufacturers’
instructions relating to the sitting and
water feed details to the pump. Keep all
pipework runs as short as possible for
maximum shower performance.
N.B. Wherever possible 22mm
pipework should be used.
