Bristan Prism PM 3HWMBAS C Fitting Instructions & Contents List Download Page 2

WATER PRESSURE 

 

This mixer is suitable for use at all supply pressures. However for 
optimum use both the hot and cold supplies should be reasonably 
balanced. If the fitting is installed at low pressure (tank fed), then 
the minimum distance from the outlet of the nozzle to the underside 
of the cold tank should be approximately 2 metres to ensure 
adequate performance. This mixer should be installed in compliance 
with Water Regulations. Where the supplies are unbalanced, i.e. hot 
water from the cylinder tank / cold from the mains, approved check 
valves must be fitted in the supply pipes. For further details contact 
your Local Water Authority. 

 

CONTENTS 

 

1. 

Fixing Nut (x2) 

2. 

Nut for Spout (x1) 

3. 

Grub Screw (x2) 

4. 

Washer for Spout (x1) 

5. 

Rawl Plug (x2) 

6. 

Olive (x2) 

7. 

Handle Shroud (x2) 

8. 

Handle (x2) 

9. 

Ring for Spout (x1) 

10.  Flow Straightener (x1) 
11.  Valve  – hot & cold (x2) 
12.  Screw (x2) 
13.  Mixer Body (x1) 
14.  Handle Spline (x2) 
15.  Valve Shroud (x2) 
16.  Spline Screw (x2) 
17.  Spout (x1) 
18.  Spout Shroud (x1) 
19.  Washer (x2) 
20.  Screw Spacer (x2) 
21.  Handle Cap (x2) 

 
Please Note: 

In the unlikely event you find a part missing please contact our 

customer Service Help line on 0844 701 6273 for immediate dispatch of  part.

 

 

INSTALLATION 

 

Prior to drilling into walls, check there are no hidden electrical wires, 
cables or water supply pipes with the aid of an electronic detector. 
If you use power tools do not forget to: 

 

Wear eye protection 

 

Unplug equipment after use 

1. 

Identify all the components and check for completeness, 
particularly before arranging fitting. 

2. 

Decide on the final position of the basin mixer body (13). 

3. 

Plumb up the hot and cold supply pipes to the required position. 

4. 

Attach pipework to the hot and cold inlets using the nuts (12) 
and olives (6). 

5. 

Secure mixer body (13) using the screws (12), spacers (20), 
washers (19) and rawl plugs (5).  NOTE: Before finishing the 
wall turn on water supplies to check both correct mixer 
function and for leaking from connections.  

6. 

Set fitting into wall and complete wall finish. Please note, it is 
important that the spout (17) is not damaged and that sufficient 
thread is left exposed to allow the spout (17) and the valve 
shrouds (15) to fit. 

7. 

Fit spout (17) and the spout washer (4); then screw on valve 
shrouds (15). NOTE: Use suitable sealant on the shrouds. 

8. 

Slide on the spout shroud (18) and attach handles (8) with 
grub screws (3) and handle caps (21). 

 

MAINTENANCE 

 

If the fitting begins to drip: 

1. 

Turn off the water supply. 

2. 

Remove cap (21) and grub screw (3), then remove handle (8) 
by pulling from spline (14). Unscrew both shroud (7) and valve 
shroud (15). The handle spline (14) may then be removed. 

3. 

Remove valve clip and then unscrew valve (11). Once 
removed, carefully clean seating and all exposed parts. 

4. 

Replace all of the above then turn on the water supply. 

5. 

If problem persists contact our helpline quoting a product code. 

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