19
11 Check-valve replacement
1. Seperate the shower valve from the wall
bracket by undoing the captive nuts. See
sect.4.1 step 9. Use 30mm A/F spanner.
2. Remove shower valve, and keep
sealing washers safe.
3. Using 10mm Allen key undo the retaining
inserts. NOTE: THREADS ARE LEFT HAND.
The captive nuts will also be released.
4. The check valves are housed inside the re
taining inserts and can be pulled out gently
and replaced if necessary. Note flow
directional arrow marked on check valve body.
Check valves are located in both (hot & cold) inlets to the mixer.
T
o replace the check valves:
1
2
3
4
10
30
check valve
strainer cap
strainer screen
isolating valve
direction
of flow
flow regulator
Isolation valves (not supplied with this product) MUST be fitted to permit future maintenance.
Fitting of strainers (filters) is also recommended.
These should be fitted as close as is practicable to the
watersupply inlets of the thermostatic shower mixer.
Both isolation valves & strainers should
be installed in an easily accessible location
An in-line combined isolating and filter valve
(shown here) can be purchase by contacting
Fastpart. Spares code E960613NU contains a
pair of these valves.
This valve also contains a flow regulator and
check valve (which can be removed if not required).
12 Isolating valves
For more information on spare parts why not visit our spare website
www.fastpart-spares.co.uk
fast
t
r
a
p
GENERAL MAINTENANCE TIPS:
• Isolate both water supplies first.
• Drain down the pipe work & product as much as possible:
fully open flow handle & unscrew shower hose.
• Use the correct size tools.
• Expect some trapped water to escape from the mixer.
• Ensure parts are re-assembled in the correct ‘reverse’ sequence.
• Observe torque settings - where specified.
• Restore both water supplies.
• Check all joints for leaks upon completion.