Doulton Uno Filter Select Tap Installation Instructions Download Page 3

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6.  Position and Assemble the Filter – see figure 5a to 5d

6.1  Mark the required head position for fixing

Figure 5a

6.2  Grip the grey filter cap 

(C)

 and twist to the ‘unlock’ position

6.3   Pull down to disengage the filter cap 

(C)

 from the head 

(A)

 and put the 

filter cap 

(C)

 and filter body 

(D)

 to one side

6.4  Fix the filter head 

(A)

 to the unit or wall with the 3 screws

 (B)

 provided

Figure 5b

6.5   Unscrew the filter body 

(D)

 from the filter cap 

(C)

, open the filter and 

discard the protective bag from the ceramic filter 

(E)

Figure 5c

6.6   Screw the threaded ceramic filter 

(E)

 into the grey filter cap 

(C)

 until 

washer resistance is felt - do not over tighten

6.7   Screw the white filter body 

(D)

 into the grey filter cap 

(C)

 until a positive 

stop is felt

Figure 5d

6.8   Align the arrow on the grey filter cap 

(C)

 to the unlock position on the filter 

head

 (A) 

and push the assembled filter firmly into the head until it clicks 

into position

6.9   Twist the grey filter cap 

(C)

 until the arrow is aligned with the locked 

position on the filter head 

(A)

. Check that the arrows align to ensure that 

the filter is fully locked

7.   Install the pipe work and non return valve – see 

figure 6

7.1   Measure and cut the tubing 

(F)

 to the length required to connect the inlet 

port of the filter head 

(A) 

to the Tee adaptor

 (H)

. The length of the tube 

must be a minimum of 200 mm (8”). Take the cut length of tube and cut it 
in half

7.2  Fit one end of each piece of tubing into the non return valve 

(G)

7.3   Connect the non return valve

 (G)

 to the inlet port of the filter head 

(A)

 and 

the Tee adaptor 

(H) 

with the tubing 

(F)

. Ensure that the flow arrow on the 

non return valve 

(G)

 is pointing in the direction of the filter head 

(A)

7.4   Measure and cut the tubing 

(F)

 to the length required to connect the outlet 

port of the filter head 

(A) 

to the 7/16” adaptor

 (K)

 on the pillar tap 

(L)

Connect the tube to the filter head outlet port and pillar tap

7.5   Check that the arrows on non return valve

 (G)

 and the ports of the filter 

head 

(A)

 are pointing in the correct direction of flow – towards your pillar 

tap 

(L

) see figure 7

8.   Check the system for leaks

 

 For guidance on identification of system components see page 1 and 
figure 1

8.1   With the pillar tap 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

8.2   Check for leaks around the mains supply adaptors, non return valve, filter 

head inlet and outlet ports and pillar tap adaptor. Also check for leaks 
between the filter head, cap and filter body

8.3   If there are leaks from the adaptors, non return valve or filter head 

ports:

• 

Turn off the mains water supply

• 

Open the pillar tap 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 pillar tap open, slowly turn on the mains water to allow the system 
to fill gradually

• 

Check the system for leaks

8.4  If there are leaks from the filter head:

• 

Turn off the mains water supply

• 

 Open the pillar tap to release pressure from the system

• 

Remove the filter assembly, as described in section 6.2-6.3/figure 5a

• 

 Check the O-rings around the top of the grey filter cap 

(C)

, ensure that 

they are in place and free from dirt and particles, see figure 9

• 

Re-fit the filter assembly, as described in section 6.8 -6.9/figure 5d

• 

 With the pillar tap open, slowly turn on the mains water to allow the system 
to fill gradually

• 

Check the system for leaks

8.5  If there are leaks from the filter cap and filter body:

• 

Turn off the mains water supply

• 

Open the pillar tap to release pressure from the system

• 

Remove the filter assembly, as described in section 6.2-6.3/figure 5a

• 

Unscrew the filter body 

(D)

 from the filter cap 

(C)

• 

 Check the O-ring around the top of the filter body, ensure it is in place and 
free from dirt and particles

• 

 Remove the ceramic filter 

(E)

 by unscrewing from the filter cap 

(C)

 and 

place to one side ensuring that the open ended plastic mount is kept clean 
to avoid contamination

• 

 Check the inside of the filter cap on the surface where the body O-ring 
seals, ensure it is free from dirt and particles, see figure 9

• 

 Re fit the threaded ceramic filter and reassemble the filter as described in 
section 6.6 – 6.9/ figures 5c & 5d

• 

 With the pillar tap open, slowly turn on the mains water to allow the system 
to fill gradually

 

- Check the system for leaks

8.6  If there are leaks from the pillar tap adaptor:

• 

Turn off the mains water supply

• 

Open the pillar tap 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 7/16” tap adaptor 

(K)

 and unscrew 

the adaptor from the stem of the pillar 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 

(K) 

to the stem of the pillar 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 pillar tap open, slowly turn on the mains water to allow the system 
to fill gradually

• 

Check the system for leaks

9.  Prepare the filter for use

9.1   The pillar tap 

(L)

 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 pillar tap operating lever to enable the filter replacement indicator 
function, see figure 2

9.2  Open the pillar tap and run the water to waste for 10 minutes (or 15 litres)
9.3   Leave to stand for 24 hours to condition the ceramic filter, then run water 

to waste for a further 10 minutes. The filter is now ready for use

10.  Care and Cleaning

10.1   Use only soapy water and a soft sponge or cloth to clean the filter housing 

and pillar tap, avoid the use of:

 

- Strong oxidising agents such as bleach or Milton solution

 

- All strongly acidic materials including descalents

 

- Strongly alkaline materials

10.2   Always ensure that the filter housing and pillar tap are thoroughly rinsed 

and dried after cleaning

10.3   If used with hard water or water with very high mineral content it is 

necessary to clean and dry the pillar tap after use, build up of calcium and 
other minerals could seriously damage the surface of the tap

Figure 5a

Figure 5b

Figure 5c

Figure 5d

A

C

C

E

D

A

C

D

Figure 6

Existing kitchen tap

Existing 

hot

Mains cold

I
F

H

J

F

K

Pillar tap

F

A.  Filter head

C.  Filter cap

Direction of flow

Figure 7

Incoming mains 

water

To pillar tap

Bag

D

Push collar

Pull 

Tubing

Collar

Adaptor

Body O-ring seal face inside

Figure 8

Figure 9

O-ring

O-ring

C

D

G

L

E

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