15
Pre-installation
Installation
PumpWise guidelines
General specification
Trouble shooting
PumpWise and warranty
Figure 26: Anti-gravity loop (AGL)
MAX
60°C
Outlets
Inlet
Min
600mm
Usable capacity
minimum 50 gallons
per bathroom
Vent and other
services
Non-return valve
hot outlet only
except ESP pumps
Air vents, both
hot and cold
No Stop Essex Flange
MUST be used with an
anti gravity loop at least
250mm in depth
C
H
Fig 23 Anti gravity loops
OLD STYLE DO NOT USED
Vent and
other
services
Inlet
No Stop Essex Flange
MUST be used with an
anti-gravity loop at least
250mm in depth
Cold water storage
H
C
Air vents,
both hot
and cold
MAX
60˚C
600mm or
less possible
negative head
Outlet
Outlet
Non-return
valve hot
outlet only
except ESP
pumps
Combi boilers and water heaters
As these appliances are invariably supplied
directly from the cold mains – they are not
normally suitable for booster pumps. The
exceptions are featured in Figure 14 on
page 10.
Figure 27: Combi boilers
Combi
boiler
Incoming
water main
C
H
Fig 24 Combi boilers
OLD STYLE DO NOT USED
Incoming
water main
WRONG
Combi
boiler
C
H
Horizontal cylinders
As horizontal (torpedo) cylinders are
problematic for boosted systems consult
PumpWise for guidance and correct use of
an approved top entry flange.
Use any of the
approved top
entry flanges
Usable capacity
minimum 50 galls
per bathroom
C
MAX
65°C
H
Fig 25 Horizontal cylinders
OLD STYLE DO NOT USED
Use any of the
approved top
entry flanges
Usable capacity
minimum 50 galls
per bathroom
MAX
60˚C
C
H
Approved flanges (cylinders)
The 22mm No Stop Essex and the other
approved top entry flanges with extension
pipes into the cylinder represent the best
known means of ensuring minimal aeration
of the hot supply water to the pump. The No
Stop Essex flange is in all circumstances
the best option.
S flange
Complete with compression ‘pump’ and
‘open vent’ connections. Also supplied
with an adaptor to connect to 1’’ ‘male’ and
‘female’ top entry cylinders.
Figure 29: S flange
Figure 28: Horizontal cylinders
Fig 29 S Flange
HOT WATER
CYLINDER
To pump
To vent
S flange
York flange
These may be used in systems where the
hot water requirement is less than 20
Litres per minute.