Bristan Descent DSC BAS C Mounting instructions

Please keep this booklet for future
reference.
Installer, when you have read these
instructions please ensure you leave
them with the user.
Installation Instructions
and User Guide
Descent Tap Range
Models Covered:
DSC BAS C, DSC BF C, DSC BSM C,
DSC 1HBF C, DSC FSBSM C

Contents
• Important Safety Information 3
• General Information 4
• Specifications 4
• Dimensions (mm) 5-7
• Installation Requirements 8
• Installation 9-11
• Maintenance 12-13
• Troubleshooting 13
• Guarantee 14
• Notes 15
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2
Contents
Thank you for choosing Bristan.
These fitting instructions have been created to give you all of the information you
need for a safe and successful installation, so please read them thoroughly and retain
for future reference.
If you need any further help, please do not hesitate to give us a call on 0330 026 6273.

All products manufactured and supplied by the manufacturer are safe to use
provided that they are installed, operated and receive regular maintenance in
accordance with these instructions.
If you are in any doubt about your ability to install this product safely you
must employ the services of an experienced qualified plumber.
This product needs to be installed in accordance with, and meet the
requirements of the Water Supply (Water Fittings) Regulations 1999 and
current by-laws. For full Installation Requirements & Notes (IRN)
please visit wras.co.uk/directory.
Remove all packaging and check the components for damage before
starting installation. Before starting any installation please consider
the following:
Prior to drilling into walls, check that there are no
hidden electrical wires, cables or water supply pipes.
This can be checked with the aid of an electronic
detector.
If power tools are used do not forget to:
- Wear eye protection
- Unplug equipment after use
Isolation valves must be fitted to the inlet water supplies to ensure ease of
future maintenance.
Before installing this product the water supply must be thoroughly flushed in
order to remove any swarf, solder etc.
This product must not be modified in any way as this will invalidate
the guarantee.
Full access must be made available for future maintenance/servicing
purposes.
If in doubt, contact a registered plumber or your Local Water
Authority or the Secretary of the Institute of Plumbing, address as follows:-
The Institute of Plumbing,
64 Station Lane,
Hornchurch,
Essex,
RM12 6NB, Tel: [phone]
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Important Safety Information

This product has been designed to comply with BS EN 200 for combination
taps to be used within systems designed to BS 6700.
BS 6700 recommends the temperature of stored water should never exceed
65°C. A stored water temperature of 60°C is considered sucient to meet all
normal requirements and will minimise the build up of lime scale in hard water
areas.
If installing this product on a low pressure (tank fed) system please see
specification table below to determine the minimum distance required from
underside of the cold water tank to the outlet.
These taps and mixers should be installed in compliance with the Water
Regulations. Where the supplies are unbalanced, i.e. Hot water from cylinder
tank/cold from the mains, approved check valves must be fitted in the supply
pipes.
For further details contact your Local Water Authority.
P r o d u c t
Code
Working
Pressures Inlet
Minimum distance
from cold water
tank to outlet
(metres)
Min Max
DSC BAS C 0.2 5.0 M10 15mm Compression
Flexible Tails
2
DSC BF C 0.2 5.0 3/4" BSP Threaded Tail 2
DSC BSM C 0.3 5.0 3/4" BSP Threaded Tail 3
DSC 1HBF C 1.0 5.0 M12 15mm Compression
Flexible Tails
10
DSC FSBSM C 1.5 5.0 M12 15mm Compression
Flexible Tails
15
Maximum static pressure: 10.0 bar
System Requirements:
Gravity fed hot & cold (Equal pressures)
Gravity fed hot & cold (Dierential pressure, maximum ratio 5:1)
Unvented systems
Instantaneous water heater (Combination boiler)
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General Information
Specifications

Dimensions are approximate and in millimetres.
Bath Filler
Basin Mixer
137
70
180
140
147
107
90
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Dimensions (mm)

1 Hole Bath Filler
Dimensions are approximate and in millimetres.
Bath Shower Mixer
137
70
180
63
176
209
128
108
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Dimensions (mm)

Dimensions are approximate and in millimetres.
843
375
190
220
Floor Standing Bath Shower
Mixer
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Dimensions (mm)

Flexible Connecting Pipes
Care must be taken when connecting the flexible connection pipes to the household
pipework to ensure they do not bend sharply and kink or twist.
See below for recommended ways to fit the flexible connecting pipes.
Slight
bend
90°
Angle
Kink Curved
round
Twists
Important: Failure to follow these guidelines may result in poor performance
and damage to the flexible connecting pipes.
Important: Full access must be made available on installation for future
maintenance/ servicing purposes.
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Installation Requirements

Basin Mixer / 1 Hole Bath Filler
1. Screw the flexi tails into the bottom
of the body by hand only (DO NOT
OVERTIGHTEN).
2. Feed the flexi tails through the
hole in the basin / bath, ensuring
the washer is fitted between the tap
body and fixing surface to ensure a
water tight seal.
3. Screw the fixing rods into the
bottom of the tap body. Slide the 'C'
shaped rubber washer and 'C' shaped
metal washer onto the fixing rods up
to the underside of the basin/bath.
4. To secure the tap body in place
tighten the fixing nuts onto the
fixing rods until the are fully
tightened against the 'C' shaped
metal washer. The fixing nuts can be
tightened with a suitable spanner.
5. Connect the flexible tails to the hot
and cold water supplies.
6. Turn on both water supplies,
operate the handle in both directions,
letting the water flow for a few
minutes to flush through the system.
7. Fit the clicker waste (for basin
mixer only) ensuring the rubber
washer is fitted between the basin
and the waste. Place the other rubber
washer under the basin and secure
by tightening the backnut, in order to
fill the basin, the button in the middle
of the waste needs to be pressed
down. To release the water, press the
button again.
8. Check all joints and connections
for any leaks.
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Installation

Bath Filler and Bath Shower Mixer
1. Fit the tap body to the bath ensuring
that the washers are fitted between the
body and the bath to create a water
tight seal.
2. Secure the body to the bath using the
washers and metal backnut. Tighten the
backnuts onto the threaded tails.
A suitable spanner may be required to
fully tighten the backnuts.
3. Connect the hot and cold water
supplies to the threaded tails using
a ¾” BSP connector (not supplied).
4. Bath Shower Mixer only - fit the
shower hose to the hose outlet using
the small sealing washer, and the
handset to the hose using the small
washer.
Important: Prior to the drilling into
walls, check there 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
Fit the wall bracket (not shown) to the
wall using the fixings supplied, ensuring
the handset and hose reaches it.
5. Turn on both water supplies and turn
both handles to the on position, letting
the water flow for a few minutes.
6. Check all joins and connections for
any leaks.
7. To switch from bath to shower mode,
pull the diverter knob up and turn, to
revert back to bath filling mode push
the diverter knob back down.
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Installation

1. Mark the fixing holes of the base onto the
floor surface at the required position, also
marking a central hole for the flexi tails to go
through.
Note: If the bath shower mixer is to be fitted
onto wooden floorboards, the boards must be
reinforced with additional wooden batons due
to the height and weight of the bath shower
mixer. If the floorboards are not reinforced this
may result in the mixer flexing slightly during
operation.
2. Drill suitable holes for the fixings and the
central hole.
3. Terminate suitable pipework for the water
supplies under the floor and ensure the flexi
tails will be able to connect once the bath
shower mixer is fitted.
4. Slide the plinth along the mixer body and
thread the flexi tails through the fixing base.
Thread the flexi tails through the central hole
and connect to the water supplies. The flexi
tails are marked red for hot and blue for cold.
5. Secure the fixing base to the floor using the
fixing supplied.
6. Screw the mixer body onto the fixing base
and push the plinth down to cover the base.
7. Connect the hose to the hose outlet and fit
the handset to the hose using the small
washers.
8. Turn on both water supplies. Operate the
handle in both directions, letting the water
flow for a few minutes.
9. Check all joins and connections for any
leaks, before finishing the floor work.
10. Operate the mixer in both, bath and shower
mode. To switch from bath to shower mode,
pull and then twist the diverter. To revert back
to bath fill, turn the diverter back.
Floor Standing Bath Shower Mixer
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Installation

Bristan products are made from premium materials, with hand polishing
and electroplated finishes.
Your taps or shower should be regularly cleaned with warm water, a mild
pH-neutral liquid soap, and polished with a soft cloth. Any residues from
soap, toothpaste, shampoos and shower gels can cause blemishes if not
rinsed o straight after use.
Household bleaches and cleaners contain harsh chemicals and may damage
the surface finish. Avoid using abrasive cloths, scouring pads, scrub sponges,
steel wool or anything similar.
Some surfaces such as nickel and pewter may be aected by the dye found
in some cloths, so it is also important to avoid hanging cloths on spouts.
Before carrying out any maintenance,
turn o the both water supplies or
close any isolating valves. Prise out
the handle cap, loosen the grub screw
using a 2.5mm hexagonal key and
remove the handle.
Valve
Remove the spline adaptor. Using
a suitable socket remove the valve.
Wash the valve with clean running
water and make sure that any debris
has been removed. Lightly grease the
seal (only use silicone grease), replace
the valve, spline adaptor and handle.
Tighten the grub screw and push fit
the cap.
Cartridge/Valve Cleaning
General Cleaning
Important: Tighten the valve/
retaining nut with the correct
size spanner / socket and apply
appropriate force/torque.
Do not overtighten.
2.5 mm
hexagonal key
Handle
Tap body
Valve
Grub
Sc rew
Cap
Spline
Adaptor
Sc rew
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Maintenance

Cartridge
Unscrew the shroud and cartridge
retaining nut and pull the cartridge
out from the body. Clean the cartridge
thoroughly under cold water to
remove any build up of limescale or
debris. Replace the cartridge into the
body and tighten the retaining nut
and shroud. Push the handle onto the
cartridge and tighten the grub screw
and push fit the cap.
Symptom Cause Remedy
No flow or
low flow rate
Partially closed isolation valve. Open isolation valve.
Instantaneous water heater cycles
on and o as flow rate or pressure
is too low.
Increase water flow rate or
pressure through system to meet
required minimum working
pressure of tap.
Head of water is below the
minimum distance required.
Refer to 'Specifications' on page 5.
Hot or cold water being drawn
o elsewhere causing pressure
changes or instantaneous boiler
temperature changes.
Do not use other water outlets
when using the taps.
Airlock or partial blockage in the
supply pipework.
Flush through pipework to ensure
removal of debris and any airlocks.
Water
dripping
from taps
This is normal for a short time after
using the taps.
This is caused by residual water
tension, the build up of water in
the tap body.
If water continues to drip,
possible build up of debris/
limescale in ceramic disc valves.
Remove valves/cartridge and
clean, refer to 'Maintenance'
section before removing.
Taps do not
turn on
Closed isolation valve. Open isolation valve.
Water supplies to the tap turned
o.
Turn on both water supplies to the
tap.
Handle
Shr oud
Retaining
Nut
Cartridge
Tap Body
2.5 mm
hexagonal key
Grub Sc rew Cap
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Maintenance
Troubleshooting

At Bristan, we want to make things
as easy as possible for our customers.
That’s why we oer solid guarantees
on all our products, eective from the
date of purchase, to give you peace
of mind.
To start your free guarantee simply
scan the QR code and register your
product.
Alternatively visit www.bristan.com/
register to register your product via
a computer.
For full guarantee terms and
conditions visit www.bristan.com/
guarantees.
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Guarantee

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Notes

Address
Birch Coppice Business Park
Dordon
Tamworth
Staordshire
B78 1SG
Web: www.bristan.com
Email: enquir[email protected]
A Masco Company
Issue: D2
Part Number: DSC BOOK 1