9
Pre-installation
Installation
PumpWise guidelines
General specification
Trouble shooting
PumpWise and warranty
Right pump universal
A Right universal twin for a bathroom in a
loft-conversion.
Figure 10: Negative head
Right pumps (positive head)
Right universal twin pumps to a whole house
system. In these systems TOILETS must be
fitted with equilibrium ball valve(s).
Figure 11: Positive head
Negative head systems
Negative head systems exist where no
natural flow of water goes to the outlet
because either the outlet, or the pipework
to the outlet, is above the height of the base
of the cold water cistern. Most instances
of negative head systems occur in loft
conversions or where the cold water cistern
sits on the joists in the loft. If the distance
between the bottom of the cold water
cistern and the highest point of the system
after the pump is 2 feet (610mm) or less,
it is also possible that a universal pump will
be required. Salamander’s universal range
of pumps activates the pump automatically
even where no natural flow exists.
Negative head is also needed for electric
showers, dishwashers, washing machines or
where pumped hot water meets mains cold.
Fit an
equilibrium
ball valve
The hot
connection
must be via
an approved
side or top
entry flange
(see page 16)
Vent and
other
services
Cold water storage
Negative head
Outlet
Inlet
Outlet
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