Doulton Duo Filter Mixer Tap User manual

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Filter Housing Comprising:
A. Cover
B. Mounting Plate
C. Filter Head x 2
D. Mounting Screws x 6
E. Filter Cap x 2
F. Filter Body x 2
G. Pre Filter
H. Ceramic Filter
Fitting Kit:
I. 3/8” Tubing
J. 3/8” Non Return Valve
K. 3/8” Tee Adaptor
L. ½” Female Adaptor
M. ½” Male Stem Adaptor
N. 7/16” Tap Adaptor
O. ½” Male Adaptor
P. ½” Brass Adaptor
Mixer Tap Comprising:
Q. 3 way Mixer Tap
R. Bezel
S. O-Ring
T. Fixing Studs x2
U. Rubber Washer
V. Metal Washer
W. Locking Nut x2
X. Filtered Water Hose
Y. Hot (Red) Water Hose
Z. Cold (Blue) Water Hose
A. Cover
Duo Filter Mixer Tap
Filter Installation
Instructions
Parts included in your Duo Filter Mixer Tap filtration system
B. Mounting plate
C. Filter head
F. Filter body
H. Ceramic Filter
I. 3/8” Tubing
J. 3/8” Non Return Valve
K. 3/8” Tee Adaptor
L. ½” Female Adaptor
M. ½” Male Stem Adaptor
N. 7/16” Tap Adaptor
O. ½” Male Adaptor
P. ½” Brass Adaptor
Q. 3 way Mixer Tap
R. Bezel
S. O-Ring
V. Metal Washer
U. Rubber Washer
W. Locking Nuts
D. Mounting
screws
E. Filter cap
G. Pre Filter
T. Fixing Studs
X. Filtered
Water Hose
Z. Cold (Blue) Water Hose
Y. Hot (Red) Water Hose

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Figure 2a
5.3 Fit the flexible supply pipes (X, Y & Z) by screwing the threaded part with
O-ring seals into the underside of the tap body. Ensure that each pipe is
fully inserted and hand tight only – do not over tighten
5.4 Screw the short thread of the threaded fixing studs (T) into the underside
of the tap body. Ensure that each stud is fully inserted and hand tight only
– do not over tighten
Figure 2b
5.5 Place the bezel (R) with o-ring seal (S) over the mounting hole with the
o-ring seal facing downwards. Insert the flexible supply pipes (X, Y & Z)
through the bezel and mounting hole and seat the tap body onto the bezel
5.6 Position the tap so that the filtered water tap lever is on the left hand side
of the tap body and the lever is turned towards the user to operate the tap
5.7 From beneath the sink/work surface place the rubber washer (U) and
metal washer (V) over the threaded fixing studs (T) and secure the tap into
position using the locking nuts (W). Note that the locking nuts are fitted
with the cylindrical portion towards the underside of the sink/work surface
5.8 Screw the 7/16” tap adaptor (N) to filtered water flexible supply pipe on
the mixer tap - do not over tighten
6. Install the adaptor to your cold water mains supply
If your cold water supply pipe fitting has a ½” BSP Female
connection – see figure 3
6.1 Connect the ½” Male Stem Adaptor (M) to the fitting on the mains cold
water supply - do not over tighten
6.2 Connect the ½” Male Adaptor (O) to the flexible cold water hose (Z) on
your new mixer tap (Q) - do not over tighten
6.3 Connect the Tee Adaptor (K) to the Stem Adaptor (M) on the mains cold
water supply
6.4 Measure the length and cut the tubing (I) required and use to connect the
Tee Adaptor (K) to the Male Adaptor (O) on the flexible cold water hose (Z)
on your new mixer tap (Q)
If your cold water supply pipe fitting has a ½” BSP Male
connection – see figure 4
6.5 Connect the ½” Female Adaptor (L) to the fitting on the mains cold water
supply - do not over tighten
6.6 Connect the ½” Male Stem Adaptor (M) to the flexible cold water hose (Z)
on your new mixer tap (Q) - do not over tighten
6.7 Connect the Tee Adaptor (K) to the Stem Adaptor (M) on the flexible cold
water hose (Z) on your new mixer tap (Q)
6.8 Measure the length and cut the tubing (I) required and use to connect the
Tee Adaptor (K) to the Female Adaptor (L) on the mains cold water supply
Note: It is important that the tube ends are always cut square
and that the tubes are pushed into the fittings and housing to a
minimum of 18mm (0.75”) to ensure a good seal
6.9 Connect the flexible hot water hose (Y) to the fitting on the mains hot
water supply. If necessary use the ½” Brass Adaptor (P) from the fitting kit
to convert to the required thread type
1. Operating Conditions
1.1 Maximum Working Pressure: 6bar (90psi) - This filter has satisfied the
NSF/ANSI Stds 42 and 53 structural test criteria. However, due to the
potential wide variations of pressures from one installation to another, the
manufacturer advises that if there is any concern that the system would
see pressures above 6 bar then an approved pressure reducing valve set
at 6 bar should be installed upstream of the filter to eliminate any extreme
variations of pressure.
1.2 Maximum Working Temperature: 38°C (100°F)
1.3 Minimum Operating Pressure: 2bar (30psi)*
1.4 Minimum Operating Temperature: 5°C (41°F)
*This will result in a 1L/min flow of filtered water. At 45psi or greater, a
flow rate of 1.5L/min or more will be seen
2. Important
2.1 This filter is intended for installation under the sink away from direct
sunlight
2.2 This filter is not designed for the treatment of hot water and should only be
connected to the cold water supply
2.3 Maximum plastic housing life: 10 years
2.4 Water fittings for use in permanently pressurised systems have a finite life.
It is important that the plastic components in the system are replaced after
10 years usage
2.5 PLEASE NOTE: Allowing the unit to freeze will invalidate the
product warranty
3. Operating the 3 way Mixer Tap
The 3 way Mixer Tap allows selection of hot/cold and filtered water
Hot/cold water is selected by rotating the right hand mixer lever towards/
away from the user, water flow is controlled by swivelling the lever
outwards from the tap.
Filtered water is selected by operating the left hand filtered water tap lever.
The filtered water tap has an indicator light to inform the user when the
ceramic filter requires changing. The light flashes ‘blue’ when the filtered
water tap is operated, if the light flashes ‘red’ the ceramic filter requires
changing – see figure 2b
4. Location of the system and Preparation for
Connecting Pipe work and Fittings
4.1 The filter is supplied with a Mixer Tap, non-return valve, 3/8” push fit
connections and 3/8” polyethylene tubing to allow connection to a ½”BSP
mains fitting to supply cold filtered water to the mixer tap
Note: If you have a different thread connection you will need to
obtain alternative fittings to adapt your existing pipe work to the
3/8” tube supplied with this system
4.2 Ensure that there is enough space and access beneath the sink/work
surface to allow installation of your new mixer tap and filter pipe work
Note: When selecting a position for your tap, please ensure that
there is at least 50mm (2”) clearance behind the tap to allow the
hot/cold water handle to be opened fully
4.3 Position the filter in an upright position near to the incoming mains cold
water supply and new mixer tap
4.4 Ensure that connecting pipe work will not have any sharp bends. Allow min
100mm (4”) clearance below assembled filter for removal/service of the
cartridge – see figure 1
5. Install the Mixer Tap.
5.1 Turn off the water supply and unscrew the fittings which connect your hot
and cold water supply to your existing kitchen tap, remove your existing
kitchen tap
5.2 A Ø 36mm hole is required to mount the new mixer tap into the sink/work
surface
Note: When selecting a position for your tap, please ensure that
there is at least 50mm (2”) clearance behind the tap to allow the
hot/cold water handle to be opened fully
Figure 1
Non return valve
T adaptor
Adaptor
Adaptors
Mains cold water supply
Existing hot
water supply
100mm (4”)
Figure 2b
R. Bezel
Indicator
light - filtered
water
Ø 36mm tap
mounting hole
N. 7/16” Tap
Adaptor
Figure 2B
Filter
housing
Adaptors
Figure 2a T. Fixing stud
Y. Cold (Blue)
water hose
T. Fixing stud
Z. Hot (Red)
water hose
X. Filtered
water hose
S. O-Ring
V. Metal Washer
U. Rubber Washer
W. Locking Nut
T. Fixing Studs
X. Filtered
Water Hose
Z. Cold (Blue) Water Hose
Y. Hot (Red) Water Hose
Q. 3 way Mixer Tap
M
I
K
O
Q. 3 way Mixer Tap
Figure 3
X. Filtered
Water Hose
Z. Cold (Blue) Water Hose
Y. Hot (Red) Water Hose
Mains cold
water supply
Figure 4
fIGURE 4
L
K
I
M
Q. 3 way Mixer Tap
X. Filtered
Water Hose
Z. Cold (Blue) Water Hose
Y. Hot (Red) Water Hose
Mains cold water supply
P

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7. Position the Filter and Assemble the Filter for each
Housing – see figure 5a to 5d
7.1 Mark the required head position for fixing using the paper template supplied
Figure 5a
7.2 Grip the grey filter caps (E) and twist to the ‘unlock’ position
7.3 Pull down to disengage the filter caps (E) from the heads (C) and put the
filter caps (E) and filter bodies (F) to one side
7.4 Remove all packaging and fix the mounting plate (B) and filter heads (C) to
the unit or wall with the 6 screws (D) provided
Figure 5b
7.5 Unscrew the filter bodies (F) from the filter caps (E), open the filters and
discard the protective bags from the pre filter (G) of the left hand housing
and the ceramic filter (H) of the right hand housing
Figure 5c
7.6 Screw the threaded pre filter (G) into the grey filter cap (E) of the left hand
housing until washer resistance is felt, repeat for the ceramic filter (H) for
the right hand housing - do not over tighten
7.7 Screw the white filter bodies (F) into the grey filter caps (E) until a positive
stop is felt
Figure 5d
7.8 Align the arrow on the grey filter cap (E) of the assembled pre filter to the
unlock position on the left hand filter head (C) and push the assembled
filter firmly into the head until the clicks into position. Repeat this for the
assembled ceramic filter into the right hand filter head.
7.9 Twist the grey filter cap (E) of the assembled pre filter until the arrow is
aligned with the locked position on the left hand filter head (C). Check that
the arrows align to ensure that the filter is fully locked. Repeat this for the
assembled ceramic filter into the right hand filter head
Note: it is important that pre filter and ceramic filter are fitted in
the correct locations - See figure 6
8. Install the pipe work and non return valve – see
figure 6
8.1 Measure and cut the tubing (I) to the length required to connect the inlet
port of left hand filter head (C) to the Tee adaptor (K). The length of the
tubing must be a minimum of 200 mm (8”). Take the cut length of tubing
and cut it in half
8.2 Fit one end of each tube into the non return valve (J)
8.3 Connect the non return valve (J) to the inlet port of the left hand filter head
(C) and the tee adaptor (K) with the tubing (I). Ensure that the flow arrow
on the non return valve (J) is pointing in the direction of the filter head (C)
8.4 Measure and cut the tubing (I) to the length required to connect the
outlet port of the right hand filter head (C) to the 7/16” adaptor (N) on the
filtered water hose on the mixer tap. Connect the tubing to the filter head
outlet port and mixer tap
8.5 Check that the arrows on non return valve (J) and the ports of the left
and right hand filter heads (C) are pointing in the correct direction of flow
towards the mixer tap – see page 1 and figure 7
9. Check the system for leaks
For guidance on identification of system components see page 1 and
figure 1
9.1 With the mixer tap filtered and hot/cold water taps open, slowly turn on the
mains water to allow the system to fill gradually until all of the trapped air
has been expelled from the system
9.2 Check for leaks around the mains supply pipes and adaptors, non return
valve, filter head inlet and outlet ports and filtered water adaptor. Also
check for leaks between the filter head, cap and filter body
9.3 If there are leaks from the adaptors, non return valve or filter head
ports:
• Turnoffthemainswatersupply
• Openthemixertaplteredandhot/coldwatertapstoreleasepressure
from the system
• Pressinonthecollararoundthetubingwhereitenterstheadaptor,see
figure 8
• Pullthetubingtoreleaseitfromtheadaptor
• Checktomakesurethatthetubingiscutsquareandthatthatitisnot
scratched or crimped
• Ifthetubingisunevenlycutorscratched,cutoffthedamagedsection
squarely and re install the tubing
• Withthemixertaplteredandhot/coldwatertapsopen,slowlyturnonthe
mains water to allow the system to fill gradually
• Checkthesystemforleaks
9.4 If there are leaks from the filter head:
• Turnoffthemainswatersupply
• Openthemixertaplteredandhot/coldwatertapstoreleasepressure
from the system
• Removethelterassembly,asdescribedinsection7.2–7.3/gure5a
• ChecktheO-ringsaroundthetopofthegreyltercap(E), ensure that
they are in place and free from dirt and particles, see figure 9
• Re-tthelterassembly,asdescribedinsection7.8–7.9/gure5d
• Withthemixertaplteredandhot/coldwatertapsopen,slowlyturnonthe
mains water to allow the system to fill gradually
• Checkthesystemforleaks
9.5 If there are leaks from the filter cap and filter body:
• Turnoffthemainswatersupply
• Openthemixertaplteredandhot/coldwatertapstoreleasepressure
from the system
• Removethelterassembly,asdescribedinsection7.2–7.3/gure5a
• Unscrewthelterbody (F) from the filter cap (E)
• ChecktheO-ringaroundthetopofthelterbody,ensureitisinplaceand
free from dirt and particles
• Removethelterelementbyunscrewingfromtheltercapandplaceto
one side ensuring that the open ended plastic mount is kept clean to avoid
contamination
• ChecktheinsideoftheltercaponthesurfacewherethebodyO-ring
seals, ensure it is free from dirt and particles, see figure 9
• Retthethreadedlterelementandreassemblethelterasdescribedin
section 7.6 – 7.9/ figures 5c & 5d
• Withthemixertaplteredandhot/coldwatertapsopen,slowlyturnonthe
mains water to allow the system to fill gradually
• Checkthesystemforleaks
9.6 If there are leaks from the mixer tap adaptor:
• Turnoffthemainswatersupply
• Openthemixertaplteredandhot/coldwatertapstoreleasepressure
from the system
• Pressinonthecollararoundthetubingwhereitentersthe7/16”tap
adaptor (N).See figure 8
• Pullthetubingtoreleaseitfromtheadaptorandunscrewtheadaptorfrom
the filtered water flexible supply pipe on the mixer tap
• Checkthattheblacksealingwasheriscorrectlyseatedinthethreaded
hole of the tap adaptor
• Makesuretheblacksealingwasherisundamagedandfreefromdirtand
particles
• Screwthetapadaptor (N) to the filtered water flexible supply pipe on the
mixer tap - do not over tighten
• Ensuresurethatthetubingiscutsquareanditisnotscratchedorcrimped
• Ifthetubingisunevenlycutorscratched,cutoffthedamagedsection
squarely and re install the tubing
• Withthemixertaplteredandhot/coldwatertapsopen,slowlyturnonthe
mains water to allow the system to fill gradually
• Checkthesystemforleaks
10. Prepare the filter for use
10.1 The 3 way mixer tap (Q) has an indicator light to inform the user when the
ceramic filter requires changing. The light flashes ‘blue’ when the filtered
water tap is operated, if the light flashes ‘red’ the ceramic filter requires
changing. Remove the plastic battery protection strip from the underside
of the mixer tap filtered water tap lever to enable the filter replacement
indicator function, see figure 2b
10.2 Open the mixer tap filtered water tap and run the water to waste for
10 minutes (or 15 litres)
10.3 Leave to stand for 24 hours to condition the ceramic filter element, then
run water to waste for a further 10 minutes. The filter is now ready for use
Figure 5a Figure 5b
Figure 5c Figure 5d
C
E
E
G/H
F
C
E
F
Figure 7
Direction of flow
Incoming mains
water
To mixer tap
Bag
F
Push collar
Pull
Tubing Collar Adaptor Body O-ring seal face inside
Figure 8 Figure 9 O-ring
O-ring
Figure 1/6
Figure 6
N
K
I
M
Mains cold
water supply
Q. 3 way Mixer Tap
J
P
O
I
I
I
E
F
Prefilter Ceramic Filter
G/H

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14. Cleaning the ceramic filter (H) – see figure 11
Due to filtration of particulate contaminants from the water during use, the
flow of water from the filter may reduce over a period of time. To restore
flow to its normal level simply clean the ceramic filter as follows:
14.1 Hold the ceramic filter in a bowl of water or under running water.
Ensure that the open ended plastic mount is clear of the water to avoid
contamination
14.2 Take a clean kitchen scouring pad in one hand and cup it around the
circumference of the ceramic filter at the top next to the mount. Press
gently onto the filter surface with the scouring pad, whilst quickly turning
the filter with the other hand
14.3 Apply a gentle even pressure with the pad and slowly work down the
length of the filter once. Ensure that the cleaning is uniform over the whole
filter
15. Re-setting the Mixer Tap filtered water indicator light
or changing the battery – see figure 12
When the ceramic filter has been changed the Mixer Tap filtered water
indicator light will need to be re-set. To re-set the indicator light or change
the battery, follow the steps below. It is recommended that a new mixer tap
battery is fitted every 12 months
15.1 Remove the battery holder by pulling out from the underside of the filtered
water tap operating lever
15.2 Remove the battery
15.3 Re fit the new battery or if you are just re-setting the indicator light put
the old battery back in. The led light on the circuit board will flash red then
blue
15.4 Push the battery holder into the underside of the filtered water tap
operating lever, ensure the light on the circuit board aligns with the light
lens. The indicator light is now re-set for use with the new ceramic filter,
when the filtered water tap is operated the indicator light flashes ‘blue’
11. Care and Cleaning
11.1 Use only soapy water and a soft sponge or cloth to clean the filter housing
and mixer tap, avoid the use of:
- Strong oxidising agents such as bleach or Milton solution
- All strongly acidic materials including descalents
- Strongly alkaline materials
11.2 Always ensure that the filter housing and mixer tap are thoroughly rinsed
and dried after cleaning
11.3 If used with hard water or water with very high mineral content it is
necessary to clean and dry the mixer tap after use, build up of calcium and
other minerals could seriously damage the surface of the tap
12. Servicing/Replacing the ceramic filter (H) in the right
hand filter housing – see figure 10
12.1 Grip the textured rim of the grey filter cap (E), twist to the ‘unlock’ position,
taking care not to trap fingers and pull down to disengage.
Note: If the filter has had little use prior to servicing, twist the grey
filter cap (E) to the ‘V’ vent position and open the mixer tap filtered
water tap (to relieve pressure in the filter), twist the grey cap to
the ‘unlock’ position and pull down to disengage the filter whilst
the tap remains open
12.2 The water supply is automatically turned off when the filter is dismantled.
Note: If the filter is to be left unattended whilst dismantled for an
extended period of time (i.e. over 1 hour) then the upstream mains
water supply should be turned off
12.3 Take the filter cartridge to the sink – remembering that it is still full of
water
12.4 Unscrew the grey filter cap (E) to remove the filter body and empty the
water into the sink, taking care not to contaminate the open ended
neck of the filter cap with unfiltered water
12.5 Unscrew the ceramic filter (H) from the grey filter cap (E).
Note: Care must be taken to prevent contamination of the neck of
the filter cap and filter element mount stem
12.6 Replace the ceramic filter or clean as described in section 14 and then
wash your hands. Note: If replacing with a new ceramic filter, prepare
the filter for use as described in section 10 or as per the Operating and
Exchange Instructions supplied with the ceramic filter
12.7 The used ceramic filter can be wrapped in a plastic bag or newspaper for
disposal with your household waste
13. Replacing the pre filter (G) in the left hand filter
housing – see figure 10
13.1 Refer to section 12.1 to 12.4 to open the left hand housing for removal
and replacement of the pre filter
13.2 Replace the Pre Filter with a new unit, replacement is recommended every
3 - 6 months dependant on the quality of your water
Figure 10
C
E
F
G/H
Vent position Figure 11
Figure 12
Install battery, red light will
flash, followed by a blue light
Insert battery as shown
Battery holder
Indicator
light - filtered
water

MANUFACTURED BY FAIREY INDUSTRIAL CERAMICS LIMITED
Lymedale Cross, Lower Milehouse Lane, Newcastle-under-Lyme
Staffordshire, ST5 9BT. United Kingdom.
Telephone No. 44-1782-664420
www.doulton.com
Doulton
®
is a trademark registered to Fairey Industrial Ceramics Limited.
W2393030 Issue 2 www.doulton.com
Parts and Service Availability - Buy online at
www.doulton.com
Product Warranty - Your filter housing is covered under warranty for 12 months
from the purchase date of the product against any failure due to defect of
materials, workmanship or design of the filter housing. Please retain your receipt
as proof of purchase. To register your product warranty please visit www.doulton.
com/product-registration/ and complete the Product Registration Form.