Stuart Turner Monsoon Series Guide

Installation, Operation & Maintenance
Instructions
Please leave this instruction booklet with the home owner as it contains
important guarantee, maintenance and safety information
Read this manual carefully before commencing installation.
This manual covers the following products:
Monsoon U1.5 bar Twin
Pt. No. 46505 Pt. No. 46505 ROI
Pt. No. 46505 EXP
Monsoon U2.0 bar Twin
Pt. No. 46480 Pt. No. 46480 ROI
Pt. No. 46480 EXP
Monsoon U3.0 bar Twin
Pt. No. 46410 Pt. No. 46410 ROI
Pt. No. 46410 EXP
Monsoon U4.0 bar Twin
Pt. No. 46411 Pt. No. 46411 ROI
Pt. No. 46411 EXP
Monsoon U4.5 bar Twin
Pt. No. 46412 Pt. No. 46412 ROI
Pt. No. 46412 EXP
FOR POSITIVE OR NEGATIVE HEAD APPLICATIONS
CE compliant product

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PRODUCT DESCRIPTION
Electric motor driven twin ended peripheral pumps complete with an automatic control
system, consisting of flow switches, pressure switch and pressure vessel and electronic
controls.
APPLICATION
Monsoon Universal pumps are suitable for positive or negative head installation
conditions. The pumps are designed for whole house pressure boosting applications in
vented stored water systems. Inlet pressures to the pump and ambient temperatures
must not exceed the values given in the technical specifications.
zThis pump set must not be used for any other
application without the written consent of Stuart
Turner Limited and in particular, must not be
connected directly to the mains water supply.
zThis appliance can be used by children aged from
8 years and above and persons with reduced
physical, sensory or mental capabilities or lack of
experience and knowledge if they have been given
supervision or instruction concerning use of the
appliance in a safe way and understand the
hazards involved. Children shall not play with the
appliance. Cleaning and user maintenance shall
not be made by children without supervision.
zChildren should be supervised to ensure that they
do not play with the appliance.
zWARNING - Washer/condenser dryers and
condenser dryers. The pump must not be used in
the water supply line to a washer/condenser
drier or a condenser drier, which uses a constant
flow of cold water to aid the condenser drying
process, as damage can occur to the pump. If
in doubt or for further information contact Stuart
Turner Ltd.
Please read installation details carefully as they are intended to ensure this
product provides long, trouble free service. Failure to install the unit in
accordance with the installation instructions will lead to invalidation of the
warranty.
STORAGE
If this product is not to be installed immediately on receipt, ensure that it is stored in a dry,
frost and vibration free location in its original packaging.

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Cont ...
CONTENTS Page
Checklist ........................................................4
Pre-Installation ...................................................5
Important Facts - read before commencing installation ...................6
Location ........................................................7
Pump Connections ................................................10
Electrical Installation ...............................................13
Commissioning ...................................................16
Maintenance .....................................................18
Technical Specication .............................................20
Trouble Shooting .................................................22
Guarantee .......................................................26

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Cont ...
CHECKLIST
Item Description Qty Item Description Qty
Pump 1 Tank & sealing washers 1
Hose & integral washer 4
AC
B
Your product may vary slightly from the picture above.
REGIONAL SUITABILITY
Before commencing installation, ensure the product you have purchased is
correct for your region, to avoid invalidating the guarantee.
Check the part number:
Example:
UK product Pt. No. 46410
ROI product Pt. No. 46410 ROI
Export product Pt. No. 46410 EXP
IMPORTANT: With the pump
removed from its packaging check
for any damage prior to installation.
If any damage is found contact
Stuart Turner Ltd within 24 hours of
receipt.
B
Fig. 1
A
C
Note: This image is for reference only.

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Cont ...
The pressure vessel (Fig. 2) is factory fitted to the pump assembly.
To eliminate any risk that the vessel has lost its assembly torque and sealing ability during
transit, it must be checked prior to installation and should be hand tight.
Note: Do not overtighten pressure vessel.
PRE-INSTALLATION CHECK
zThis installation book refers to UK pipework and pumps supplied with hoses
suitable for 22 mm pipework.
zIf you have purchased a product suitable for ROI (Republic of Ireland) it will
be supplied with hoses suitable for 21 mm pipework.
zIf you have purchased a product suitable for Export it will be supplied with
hoses suitable for G ¾ connections.
Fig. 2
Pressure vessel
Note: This image is for reference only.

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Cont ...
1 IMPORTANT FACTS: READ BEFORE COMMENCING PUMP INSTALLATION
A. Water storage capacity.
1.11 The hot and cold water storage capacity must be sufficient to meet the flow
rates required by the pumped equipment and any other water using fittings and
appliances, which may be operated simultaneously.
1.12 Ensure the pump is primed as described in the priming section before starting,
damage to the shaft seal will result otherwise. See Section 5 - Commissioning.
B. Water temperature
The water entering the pump must be controlled as follows:
1.13 The maximum allowable water temperature is 65 oC.
1.14 The minimum allowable water temperature is 4 oC.
1.15 DO NOT fit a pump if the hot water is heated via a method whereby the water
temperature cannot be controlled, such as solar or solid fuel you must consult
the PumpAssist team on [phone].
C. Pipework - General
1.16 Secure pipework: Ensure pipework to and from pump is independently
supported & clipped to prevent forces being transferred to inlet and outlet
branches of pump.
1.17 Flux: Solder joints must be completed and flux residues removed prior to pump
installation (flux damage will void any warranty).
1.18 Pipework design: Care should be taken in the design of pipework runs to
minimize the risk of air locks e.g. use drawn bends rather than 90obends.
1.19 DO NOT introduce solder flux to flexible hoses, pumps or pump parts
manufactured from plastic.
1.20 DO NOT allow contact with oil or cellulose based paints, paint thinners or
strippers, acid based descalents or aggressive cleaning agents.
1.21 DO NOT install a non-return valve, or devices which contain non-return
valves, in the suction (inlet) pipework to the pump. The pump must be
free to vent to the supply tank at all times.
1.22 DO NOT bend the flexible hoses beyond 30o. They must be installed as
straight as possible.
1.23 DO NOT connect this pump to the mains water supply.
D. Plumbing Installation Regulations
1.24 The plumbing installation must comply with the current water and building
regulations.
1.25 The plumbing installation must be installed by a qualified person.
1.26 The electrical installation must be carried out in accordance with the current
national electrical regulations.
1.27 The electrical installation must be installed by a qualified person.
E. Pressure vessel
1.28 Pressure vessel is charged at the factory see Section 6 - Maintenance for
details.

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Cont ...
2 LOCATION - GENERAL
2.11 Access: For emergencies and maintenance the pump must be
easily accessible.
2.12 Protection: The pump must be located in a dry position, frost
free and protected from freezing, particularly when installed in a loft
(not recommended).
2.13 Ventilation: Ensure an adequate air flow to cool the pump. Separate
the pump from other appliances that generate heat. An 80 mm (3 “)
air gap must be maintained around the pump.
2.14 Safety: The motor casing can become very hot under normal
operating conditions. Care must be taken to ensure it cannot be
touched during operation.
2.15 Water retention: Site the pump in a location where in the unlikely
event of a water leak, any spillage is contained or routed to avoid
electrics or areas sensitive to water damage.
2.16 Static inlet pressure: Before deciding where to position the unit, check to
ensure the static inlet and outlet heads of water above the pump (Table 1), does
not exceed the maximum permitted limits.
2.17 Ambient temperature: The pump must be sited in a location where the
maximum ambient temperature does not exceed 40 oC.
2.18 Pipework: For optimum performance pipework MUST be 22 mm (21 mm in ROI).
Pipework should only reduce to 15 mm when entering terminal fitting.
2.19 Static outlet pressure: The static outlet head must not exceed the values `
shown in table 1.
2.20 Noise: The anti-vibration mounting feet and flexible hoses which are supplied
as standard, and a precaution to reduce noise transmission, however care must
be taken when mounting the pump that any noise is not amplified through loose
panels or pipework. Do not screw down the pump.
2.21 Direction of flow: Ensure the water flow is in the direction of the arrow that is
marked on the flow switch reed clamp (vertically upwards).
2.22 Flexible hoses: Only use the Stuart Turner hose set supplied with the pump.
2.23 Isolating valves: Separate system isolating valves (non restrictive) must be
fitted to allow easy pump service.
2.24 Preferred pump location: The pump must, for optimum performance, be sited
as close as possible to and never more than 4 metres from the HOT WATER
cylinder. The pump should always be sited BELOW the HOT WATER take-off
from the cylinder. The pump location is also dependent on limitations of the
static inlet and outlet heads of the installation. For guidance on limitations and
recommended location, consult the following relevant section for hot or cold
water installation.

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2.25 Non-preferred pump location: If it is necessary to position the Pump above
the secondary tapping on the hot cylinder it is fed by, the risk of introducing air
will be increased.
To avoid this risk one of the two following solutions must be adopted:
The use of a Stuart Top Entry (TE) cylinder flange.
The use of a Stuart Side Entry (SE) cylinder flange, which should have the
addition of an inverted loop (“U” bend) of 350 mm minimum drop before rising to
the pump, located as close as possible to the cylinder wall. Please note both
flange options listed above are designed to suit 22 mm pipework. If used in ROI
a suitable adaptor to 21 mm pipe must be used (not supplied). This will ensure
the pump receives an air free supply and the cylinder vents any air up the vent
pipe and not the pump feed (Fig. 3).
Table 1
Model Max.
static
inlet
pressure
Max.
static
outlet
pressure
U1.5
8 m 8 mU2.0
U3.0
U4.0 12 m 12 m
U4.5
2 PUMP LOCATION - TWIN PUMP
Fig. 3
Max. static inlet pressure (see table 1) Min. static inlet pressure 0.5 m
hot water
services
least preferred area
200 mm min
350 mm
Max. static outlet pressure (see table 1)
Negative head
Fig. 4
Max. static inlet pressure see table 1

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Cont ...
Cold water connection:
2.26 The cold water supply: Must be a DEDICATED AIR FREE supply via a tank
connector, and must be positioned at a slightly lower level (25 mm minimum)
than the feed pipe to the hot water cylinder.
Do not connect to the mains.
Hot water connection:
2.27 Hot water cylinder or storage tank: When a hot water cylinder or storage
tank is used, ensure the pipework size from the cold water storage to the hot
water storage is of adequate size and a minimum of 22 mm. The U4.5 bar Twin
should have pipework of a minimum of 28 mm.
2.28 Hot water supply: The pump must be supplied with a dedicated feed direct
from the hot water cylinder or storage tank, ensuring an air free connection to the
pump. We recommend the use of either the side entry Stuart flange (SE) Part
No 27900 or the top entry Stuart flange (TE) Part No 27800 see Fig. 5 (for all
models except the U4.5 bar Twin) (U4.5 bar Twin should only use ‘a’ or ‘d’).
Please note both flange options listed above are designed to suit 22 mm
pipework. If used in ROI a suitable adaptor to 21 mm pipe must be used (not
supplied).
2.29 Expansion pipe: When the method of connection is to be made via the
expansion pipe, the BASE of the cold water storage tank MUST be at least
1 metre above the connection/take off of the hot water storage cylinder feeding
the pump.
For applications in ROI pipe sizes above should read 21 mm.
Fig. 5
Off expansion
pipe with rising
28 mm offset
reducing to
22 mm pipework
to pump and
expansion pipe.
Off expansion
pipe with rising
22 mm offset
and 22 mm
pipework to
pump.
G 1 Stuart flange
top entry (TE)
(Part No. 27800)
with 22 mm
pipework to
pump.
Factory installed G ¾
secondary tapping with
22 mm pipework to
pump.
or
Side mounted Stuart
flange side entry (SE)
(Part No. 27900) with
22 mm pipework to
pump
a b c d

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Cont ...
3 PUMP CONNECTIONS
zDo not use stainless steel, chrome or nickel plated pipe with
the flexible hose push-in plumbing connections.
zDo not introduce solder flux into the joint or surrounding area
as connectors will be attacked and may fail.
zAll solder joints should be completed and flux residues removed
before final connection to push-in connections, on the flexible
hose.
zDo not allow contact with oil or cellulose based paints, paint
thinners or strippers, acid based descalents or aggressive
cleaning agents.
zNever operate pump with inlet and/or outlet isolating valves in
the closed position. Damage will occur!
3.11 Hose to pump: The pump inlet and outlet ports have factory assembled fittings
which are specifically designed for connection to the G¾ female running nuts on
the flexible hoses. The hose end is fitted with a rubber sealing washer which is
held captive within the nut assembly. Locate the hose into position and screw
the nut fully onto the fitting by hand. Finally nip tight with a spanner (4/5 Nm)
for a water tight seal (do not overtighten).
Fig. 6
Flexible hose
G ¾ running nut
assembly
Port fitting
Rubber sealing washer
(captive in nut assembly)
Reed
switch
clamp
assembly
29 mm AF
Anti-rotation flats
28 mm AF
Note: When tightening or loosening the
hose nut assembly, the anti-rotation
flats provided on the inlet and outlet
fittings should be used for placement of
a second spanner as shown. This is to
prevent complete assembly rotation.
It may be necessary to partially rotate
the reed switch clamp assembly on the
outlet fitting to avoid damage during
placement of the second spanner.

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Cont ...
3.12 Hose to pipework:
1. The hoses are fitted with plastic push-in connectors, which must only be
connected to the following:
z22 mm dia. pipework in the UK
z21 mm dia pipework in the ROI
Ensure the pipe is free from all score marks and deformities in the area of the
insertion depth (Fig. 7) and cut the pipe square removing all burrs and sharp
edges to prevent damage to the sealing ‘O’-ring.
2. Prior to inserting pipe into fitting mark the insertion depth on the wall of the
pipe with a soft pencil at a distance of 33 mm from the end to be inserted.
3. Check in the mouth of the fitting that ‘O’-ring, nylon washer and collet are in
position.
4. Push pipe firmly into fitting, until pencil mark is level with the top of the collet
and the pipe stop resistance is felt. Pull on pipe to check it is secure and
correctly fitted.
5. To break the joint, push pipe firmly into fitting, hold collet down and gently
remove pipe. If the system has been filled with water care should be taken to
isolate pump and towels used to absorb spilled water.
Fig. 7
Pencil
mark
Insert depth
33 mm
Pipe
Fig. 9
Body
Collet
Washer
‘O’-Ring
Pipe Stop
Hose
Isolating Valve Integral pump
isolating valve
shown in ‘OFF’
position.
Integral pump
isolating valve
shown in ‘ON’
position.

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Cont ...
3.13 Typical Low Level Installation:
In certain installations it may be necessary to install a 90° bend on the inlet or
outlet connections of the pump before the flexible hose to accommodate a low
level installation.
Below are some preferred connection options. All connections seal on the pump
body using a fibre or rubber sealing washer. Tap connector fittings should be
used which must be of an appropriate pressure and temperature rating.
It is essential when using any of the fittings shown below, that a correct water
tight seal is obtained between the pump body and selected fitting and also
the flexible hose and selected fitting. If in doubt contact the fitting manufacturer
and confirm compatibility with the connection to be sealed.
Carefully check connections and pipework for leaks whilst pump running and
stationary before leaving the installation unattended.
If you have any concern either about using push-in fittings or should the
joint leak on final test isolate the water supplies and contact PumpAssist on
[phone].
For applications in ROI pipe sizes above should read 21 mm.
Fig. 9
G¾ female x 22 mm
elbow tap connector.
Fibre washer.
22 mm
elbow.
22 mm
copper
pipe
Fibre washer.
G¾ female x 22 mm
tap connector.
22 mm compression to
G¾ male.
22 mm copper pipe.
G¾ female flexible hose
(supplied in kit).
22 mm compression to
G¾ male. G¾ female flexible hose
(supplied in kit).
22 mm to G¾
male.
G¾ female
flexible hose
(supplied in
kit).
22 mm stem elbow.
G ¾ female x 22 mm tap
connector with flush central spigot
and rubber sealing washer fitted
directly to the pump terminals.
Sealing washer (sometimes
captured in fitting)
G ¾ female x 22 mm
swivel tap connector
with flush central
spigot and rubber
sealing washer fitted
directly to the pump
terminals.

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Cont ...
4.16 Earthing: This appliance must be earthed via the supply cord, which must be
correctly connected to the earth point located in the terminal box.
4.17 Pipework: Copper or metallic pipework must have supplementary earth
bonding where the continuity has been broken by flexible hoses or plastic
components.
4.18 Additional earthing: Certain installations may require additional earthing
arrangements such as equipotential bonding. Reference should be made to the
relevant regulations concerning this subject to ensure compliance.
4.19 Connections: The pump must be permanently connected to the fixed wiring of
the mains supply using the factory fitted supply cord, via a double pole
switched fused spur off the ring main and NOT connected to the boiler or the
immersion heater circuits.
4.20 Wiring Of Connection Unit:
WARNING: This appliance must be earthed.
The wires in the mains lead (supply cord) are coloured in accordance with the
following code:
Green and Yellow: Earth Blue: Neutral Brown: Live
As the colours of the wires in the mains lead of this appliance may not
correspond with the coloured markings identifying the terminals in your
connection unit proceed as follows:
The wire which is coloured green and yellow must be connected to the terminal
in the connection unit which is marked with the letter E or by the earth
symbol: or coloured green or green and yellow.
4 ELECTRICAL INSTALLATION
4.11 Regulations: The electrical installation must be carried out in
accordance with the current national electrical regulations and installed
by a qualified person.
4.12 Safety: In the interests of electrical safety a 30 mA residual current
device (R.C.D. not supplied) should be installed in the supply circuit.
This may be part of a consumer unit or a separate unit.
4.13 Before starting work on the electrical supply ensure power supply is
isolated.
4.14 DO NOT allow the supply cord to contact hot surfaces, including the
motor shell, pump body or pipework. The cord should be safely routed
and secured by cable clips.
4.15 Adjacent pipes: Adjacent suction and delivery pipes should be fitted with
earthing clamps to and connected with earthing wire size 4 mm² (Fig. 10).
Diagram of
earth continuity
connections
Fig. 10

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The wire which is coloured blue must be connected to the terminal which is
marked with the letter N or coloured black.
The wire which is coloured brown must be connected to the terminal which is
marked with the letter L or coloured red.
4.21 Wiring Diagram:
4.22 Fuses: The following fuse size should be used with the appropriate pump.
4.23 Supply Cord Replacement:
The supply cord and internal wiring within the terminal
box are routed and secured to ensure compliance with the
electrical standard EN 60335-1. It is essential that prior to
any disturbance of this internal wiring, all cable routing and
securing details are carefully noted to ensure re-assembly to
the same factory pattern is always maintained.
If the supply cord is to be changed or is damaged, it must be replaced with a
special cord assembly available from Stuart Turner or one of their approved
repairers.
On disassembly note the cord retention and routing system. Re-assemble to the
same pattern.
For information on cable connection consult the wiring diagram and cable gland
fitting instructions.
Model Fuse Size (AMPS)
U4.0 bar Twin 13
U4.5 bar Twin
All other models 5
MAIN WINDING
THERMOTRIP CAPACITOR
START WINDING
FLOWSWITCH
REED (S3)
LINK WIRE (BLUE)
BROWN
BLACK
GREEN / YELLOW
BLUE
BROWN L
S2 S3 S3 S2
E
N230 VAC/1PH/50Hz
SUPPLY
BLUE
NMNL
S1 S1
FLOWSWITCH
REED (S2)
PRESSURE
SWITCH (S1) Fig. 11

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Cont ...
To enable correct assembly of the cable gland the ‘O’-ring (Fig. 12 item 1) must
be placed over the cable before the clamping insert (Fig. 12 item 2) can be
tightened.
Note: Cable diameter range:- 6.5 mm to 9.5 mm.
4.25 Supply Cord Extension:
The pumps are fitted with a supply cord to the following specification:-
All models ...............HO5VV-F3 G 0.75 mm² - 6 Amp rated cable.
If the supply cord is to be extended, a cord of the same specification should be
used. Any connections or junction boxes used should be specifically suited for
the application and installed in accordance with the manufacturers instructions.
4.24 Cable Gland Fitting Instructions:
Fig. 12
2
1

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5 COMMISSIONING
5.11 System Flushing: This pump incorporates push-in connectors
and plastic components that must not come into contact with
solder flux, acid-based descalents or aggressive cleaning agents.
The pipework system should be flushed out prior to the pump
being connected to ensure any contaminants/chemical residues
and foreign bodies are removed from elsewhere in the system.
5.12 Water Supply: Always ensure that water storage capacity is adequate to meet
the demand. Ensure the pump chamber is full of water before starting the pump.
Failure to do this could result in seal damage. To ensure dry running does not
occur the pump must be primed as described in priming section below.
Do not run pump dry.
5.13 Priming:
Never operate pump with inlet and/or outlet isolating valves in
the closed position. Damage will occur!
The pump must be primed (filled with water) before starting.
Turn on the service valves (1), and vent/prime each pump head.
(a) Loosen priming plug (2) and allow an even flow of water this may take a
few seconds.
(b) Re-seal draining plug, nipping tight. The pump is now ready to start.
Fig. 13
1
1
1
1
2 Priming
Plug
Note: This image is for reference only.

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Cont ...
5.14 Starting:
a) Ensure all outlets are closed, turn power supply ‘on’ - pump will start,
pressurise the system then stop.
b) Open and close all outlets in turn associated with the pump, (including w/c
systems) allowing water to flow from each outlet until all air is purged. As
each outlet is opened and closed, the pump will start and stop respectively.
Note: After closing the outlet there will be a small time delay before the
pump stops, which is normal.
c) Any tap or control valve within the system when opened and closed will now
turn the pump on/off. Providing this is the case the system is now operating
correctly.
d) Carefully check pump and pipework for leaks whilst pump running and
stationary before leaving the installation unattended.
5.15 For Further Technical Support: Phone the Stuart Turner PumpAssist team
on [phone]. Our staff are trained to help and advise you over the
phone.

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Cont ...
6 MAINTENANCE
6.11 Turn off water supplies to the pump and release pressure by
opening water outlets before attempting maintenance.
6.12 Inlet strainer: The inlet strainers may require periodical cleaning. The
frequency of this operation is dependent upon installation conditions.
The strainer is located in the inlet assembly of the pump casing (see Fig. 14) and
is removed as follows:-
a) Isolate pump electrically.
b) Release all system pressure.
c) Isolate hot and cold water supplies via the integral pump isolating valve
located in the flexible hoses and release hose nuts connected to the pump
(see Section 3 - Pump Connections).
d) Remove M4 screws (2 off) from inlet assembly, lift brass inlet fitting (with ‘O’-
ring) and clamp away from pump casing (Fig. 14).
e) Remove strainer with long nose pliers noting location lug position upon
removal (Fig. 14) and clean thoroughly.
f) Refit strainer taking care to position lug in body inlet port location slot
(Fig. 14) and re-assemble pipework. Tighten M4 clamp screws to
1.5 Nm torque.
g) After maintenance is completed refer to Section 5 - Commissioning for
instructions on re-starting pump.
6.13 No other routine maintenance is required.
Fig. 14
M4 screws
Manifold clamp
Strainer
Location detail
Inlet port
‘O’-ring
Inlet fitting

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Cont ...
6.14 Pressure vessel: Should ever the need arise for the vessel to have its air
charge checked or replenished, it should be carried out as follows: -
a) Isolate pump electrically.
b) Isolate hot and cold water supplies via the integral pump isolating valve
located in the flexible hoses (see Section 3 - Pump Connections).
c) Release system water pressure by opening a system outlet (tap).
d) Check air charge at Schrader valve (Fig. 15) using a tyre pressure gauge.
e) Replenish air charge if required by injecting air into the vessel via the
Schrader valve using a car or bicycle pump, ensuring a system outlet valve
(tap) remains open during this procedure to allow the vessel to exhaust any
excess water.
f) Close all system taps, open hot and cold inlet pump isolating valves, turn on
electrical power.
g) After maintenance is completed refer to Section 5 - Commissioning for
instructions on re-starting pump.
6.15 Water scale: As water is heated scale deposits are released in areas of hard
water, scale can cause the mechanical seal to stick if left without use for long
periods. The pump must be run for at least 5 minutes every four weeks to
“exercise” all working parts. Run on cool water. See Section 7 - Technical
Specification for note on water temperature. This particularly applies to guest
bathrooms used infrequently.
6.16 Cleaners, Disinfectants and Descalents:
Acid based descalents and aggressive cleaning agents must not
come into contact with the pump. The pump must be removed from
the system prior to the use of these products. The system should be
flushed to remove all chemicals before the pump is re-connected.
If in any doubt as to the suitability of the chemical solutions, please
contact our PumpAssist helpline on [phone].
Model Vessel Pressure
kPa bar psi
U1.5 bar Twin
90 0.9 13.0U2.0 bar Twin
U3.0 bar Twin
U4.0 bar Twin 130 1.3 18.5
U4.5 bar Twin
Fig. 15
Pressure vessel
Schrader valve
Note: This image is for reference only.

- 20 -
Stuart Turner reserve the right to amend the specification in line with its policy of
continuous development of its products.
Note: For information on other voltages/frequencies which are not shown, consult
PumpAssist on [phone].
7 TECHNICAL SPECIFICATION
Pump Model
U1.5 bar
Twin
46505
U2.0 bar
Twin
46480
U3.0 bar
Twin
46410
U4.0 bar
Twin
46411
U4.5 bar
Twin
46412
General Guarantee 5 years
WRAS approval 1404701
Features Pump type Peripheral
Mechanical seal EPDM / PTFE / Al. Oxide
Anti-vibration feet üüüüü
Inlet strainer(s) üüüüü
Flexible hoses 4 4 4 4 4
Run on Timer 3 sec 3 sec 3 sec 3 sec 3 sec
Dry run protection ü ü ü ü ü
Materials Pump body Brass
Impeller Brass
Performance Maximum head (closed valve) 1.5 bar 2.0 bar 3.0 bar 4.0 bar 4.5 bar
Performance @ 9 l/min 1.3 bar 1.5 bar 2.5 bar 3.5 bar 3.8 bar
Performance @ 18 l/min 0.8 bar 1.1 bar 1.9 bar 2.8 bar 3.2 bar
Maximum flow 32 l/min 35 l/min 40 l/min 45 l/min 51 l/min
Maximum static inlet pressure 8 metres 12 metres
Maximum static outlet pressure 8 metres 12 metres
Maximum working pressure* 600 kPa (6 bar)
Maximum ambient air temperature 40 oC
Min / Max water temperature** Min 4 oC / Max 65 oC
Flow switch sensitivity (approx) 0.6 l/min
Pressure vessel air pre-charge 0.9 bar (13 psi) 1.3 bar (18.5 psi)
Connections Pump connections G ¾ male G ¾ male G ¾ male G ¾ male G ¾ male
Flexible hoses Connections (UK model) G ¾ female x 22 mm push-in x 300 mm long, isolating valves on all hoses
Connections (ROI model) G ¾ female x 21 mm push-in x 300 mm long, isolating valves on all hoses
Connections (Export model) G ¾ female x G ¾ female x 300 mm long
Motor Type Induction, auto-reset thermal trip
Duty rating Continuous (S1) @ 9 l/min and above***
Electrical Power supply / phase / frequency 230 V a.c. / 1 / 50 Hz
Current (full load) 1.5 Amps 1.9 Amps 2.9 Amps 3.9 Amps 5.1 Amps
Power consumption 355 Watts 435 Watts 655 Watts 875 Watts 1135 Watts
Fuse rating 5 Amps 13 Amps
Power cable (pre-wired) 1.5 metres
Physical Enclosure protection IPX4
Length 265 mm 300 mm 310 mm
Width 162 mm
Height (excluding hoses) 243 mm
Weight (including fittings) 8.8 Kg 9.2 Kg 11.1 Kg 11.6 Kg