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Installation Instructions and
Home Owner’s Guide
Mechanical In-Wall Cistern
With Frame (Slim)
4179A-NA
4177A-CP 75981T-CP
8857A-CP 75890T-CP
Thank You For Choosing Kohler Company
a e W pp ce r ia ru o y e t com m ti m en o K o t t hler quali . y t Ple as m we f a e k a t e inut s e
moC relhoK
. y nap
Tools and Materials
yna retnuocne uo y fI .noitallatsni trats uo y erofeb launam siht weiver ot
.su tcatnoc ot etatiseh t ’ nod esaelp ,smelborp ecnamrofrep ro noitallatsni
gnisoohc rof niaga sknahT . r e v oc kcab eht no detsil era srebmun enohp ruO
BeforeYou Begin
The product information contained in this publication is correct at the time
c ha ca r ter it s i cs c ap , kagin v a d na g ailabilit w em it yn a ta y it tu o h furthe . e c it o n r
a el c e v i so rr oc es u t o n oD ne n o r o ni s tn e v l os r o s r the tank ya m s ih T . da e ga m
the tank. Do not use any spare parts which are not suppled
Kohler will not be responsible for any damage due to the
installation
.strap eraps de v orppa non fo
Warning
This product is designed for a water supply pressure range of 20 psi
(137kPa) minimum to 80psi (550 kPa) maximum.
Any installations where the supply pressure is outside of these limits
will not be covered by warranty.
1112039-A02-J Aug 2019 1 Kohler New Zealand
. y lgnidrocca tcudorp eht llatsni dna ylluferac ediug noitallatsni eht daeR
tcudorp ro segnahc tnemelpmi ot thgir eht se v reser .oC relhoK .gnitnirp fo
. r elhoK yb
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Features
.le v el telni reta w elbatsujdA
Advantages of In Wall Cistern
C orros i on r e sist a nt a nd l ea k
proof design.
Easy installation for stud.
Rough-in
478
438
300
Easy maintenance.
Space saving.
88 MIN.
1107 - 1297
35
135
90 MIN.
63
0-140
400+10
400kg
10-200
180
230
tank, 553mm wide, 90mm deep.
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Unit: mm
Installation procedures for an In wall cistern in a stud wall
lla w -ni eht fo noitallatsni rof snoisnemid )tekcop duts( ytivac muminiM .1
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2. Loosen the nut securing the adjustable bracket and extend to their full
supplied with the tank. Use lubricant as required and ensure enough of
the screw is explosed to mount and secure the toilet.
Nut
Allen Key
Adjustable
Bracket
3.
Place the frame into the cavity (stud pocket), ensuring the front face of
base plate with coach tek screws M8 (not supplied).
Coach Screw
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Base Plate
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4. Loosen the nut securing the adjustable bracket and adjust the height of
the frame to the dimensions stated in the toilet manufactures instructions.
. r e v o llaf ot de w olla ton dna detroppus si emarf eht erusnE :ETON
Nut
Allen
Key
Adjustable Bracket
.le v el si gon eht erusnE
Rear View
Nog
Front View
Fixing hole
.gon eht e v omeR .sduts lacitre v htob no noitisop eht kraM .6
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7. Fix the nog to the studs.
Vertical Stud
Nog
Pencil
Nog
8. A rame to the nog and also the studs at all 6 fixing hole points.
Use minimum M8 coach/tek screws (not supplied).
3
4
5
2
1
6
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Nog
Fixing Hole
Stud
Coach/Tek
Screw M8
(Not Supplied)
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9. Loosen the
rotcennoc epip etsa w eht tiF .deriuqer fi troppus epip etsa w
.troppus rotcennoc epip etsa w eht kcol dna nethgit
eht morf thgieh tcerroc eht era epip etsa w
. y rasseccen fi tsujda dna snoitcurtsni srerutcafunam
.telni reta w knat eht ot )deilppus ton(
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t h e fr e v ot em a rif y t he pan h e i g h t
Cut the gib board to suit the position
Fit the gib board to the stud.
Flush Plate Shield
Screw
Gib Board
13. Using a sharp knife. Trim the flush plate
shield back level with the finished wall. If
the finished wall is to be tiled, please ensure
the thickness of the tile is included. The trimmed
flush plate shield must sit flush with the finished
wall.
Knife
Flush Plate
Shield
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1 5 . Fit flu s h pip e co nn ec t o r s an d
Connector
on the toilet.
rotcennoc epip etsa w eht tiF .teliot
teltuo epip etsa w eht ot teksag dna
Gasket
Flush Pipe
Connector
Waste Pipe
Gasket
1 6 . Ma r k o n t he pip e co nne cto r s
so p e ht it f o n o i th f o r a er e th . t e li o t e
Ruler
.srotcennoc epip eht e v omeR
Pencil
n o kr aM .7 1 the pip e co nne c t o r s a seco n d line , w hi c h repr es ent s th e
rear of the tank and the hole in the gib board.
Waste Pipe
Mark Showing Position of Toilet Rear Flush Pipe
Connection Distance
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eht nee w teb ecnatsid eht si ecnatsid noitcennoc sihT .lla w eht nihtiw sepip
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18 . C ut b o th the w a s te pip e an d
fl h s u pipe at the co nn s i d n o it c e ta e c n
m ark s. Rem ll a e v o burr s fr om th e
cut edges and reinstall on the toilet.
19. Place the toilet onto the fixing bolts. (Ensure the toilet is supported at all
eht otno pac e v itaroced dna tun ,teksag rebbur eht tiF ).semit fixing screws
to secure the toilet in place.
Screw Cover
Toilet Fixing
Bolt
Rubber
Cover
Nut
Flush Plate installation
20. Ensure that the green cap is
tightened. Fix the locking plate to the
flush plate shield using the plastic
locking bolts. To lock the bolts in
position turn the bolt until the tab on
the bolt head is vertical. Trim the
length of the lockingbolts if required.
21. Screw the flush rods into the flush
a c tuat o r until the untr ead e d e n d o f
the rod is flush with the locking plate.
Ensur e th e flush ro d is s e cure d
through the square holes at the rear
of the flush actuato . r
t s e T the fl u sh a c ti o n t o e nsure it i s
. y ltooms gnivom
Adjust the flush rod as required then tighten
the lock nuts to prevent adjustment while in use.
Flush Rod
Unthreaded End
Gasket
Decorative
Cap
Locking
Plate
Locking
Bolts
Locking
nut
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.noitisop eht otni re v oc eht hsup dna
Full
Flush
Cover
Lock
Locking
Plate
.desu ydaer si teliot knat lla w -nI .32
Reduced
Flush
Remove and Maintenance of Outlet Valve
w re v oc e ht d l o H . 1 it d n a sd n a h ht ob h
e ht f o p o t e ht e t a t oR .d r a w pu h s up
.esaeler ot lla w eht morf ya w a re v oc
Tab
Cover
Cover
2. Unscrew the flush rods.
p os iti o n a n d r emo v e the l oc kin g
plate.
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NEPO eht ot tlob kcol eht nru T .3
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eht morf sgel e v la v 2 eht koohnU .4
Valve Leg
5. Lift the flush actuator upward to
flush actuato . r
release it from the tank and remove.
6. Turn the water off at the shut off valve
(green knob) inside the tank. Unscrew the
fill valve fixing nut and remove the fill valve.
Shut off valve
7. N o t e the o rient a ti o n o f th e fl e v l a v h s u
eht morf sgel eht e v omeR .sgel flush e v la v
b e ht gnik oo hnu yb as eht mo rf g e l eht f o e
flush .e v la v
eht gniruces bat esaeler o T .8 flush
.uo y sdra w ot ti gnillup yb e v la v
e ht e t a t oR fl a e v l a v h s u nt e s i w k co l c i
to release it from the base.
Tab
Pull
Flush Valve Leg
Outlet
Hole
Nut
Outlet
Valve
Pull
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9 . L th e flu s h v a l v e assem bl y
including the securing tab up until
.dleh eb nac bat dna e v la v eht
Se p a rat e th e t a b fr o m the flu s h
.sdra w pu ti gnillup yb e v la v
.knat eht morf bat eht e v omeR
Pull
Tab
Flush Valve
10. Lift and rotate the flush valve until
it is horizontal.
12. To replace the flush valve, follow this instruction in reverse order.
11. Rotate the base of the flush valve
out through the access panel.
Flush valve adjustment
Full Flush:
Adjust the position of the switch on
lluf eht yra v ot edis e v la v eht flush
.emulo v
Reduced Flush:
adj u s t th e p os iti o n o f th e floa t t o
v ary the reduced flush .e v la v
Adjustment
Switch
Float
Inlet valve adjustment
itna wercs eht nru T
clockwise to reduce the
.le v el reta w
T urn th e sc r ew
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c l oc k w i se t o in c re ase th e
.le v el reta w
Screw
Inlet
Valve
Float
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Trouble Shooting Procedures
Symptoms Probable Causes Recommended Action
Tank not filling
Flush not operating
Water level too high
or low
Tank does not stop
filling
The shut off valve is closed
The inlet valve float is stuck
The inlet valve is filter is
blocked by debris
The flush rods require
adjusting
Flush valve legs are
disconnected
Float level of the inlet valve
requires adjusting
The inlet valve float is stuck
The outlet valve is not sealing
correctly
The filter cap is loose Tighten the filter cap (green cap)
Open the shut off valve (green knob)
Adjust the inlet valve to an appropriate
position
Remove the inlet valve and wash out the
filter
Adjust the flush rods
Ensure the flush valve legs are installed
in the correct orientation and connected
correctly
Adjust the inlet valve float level
Adjust the inlet valve to an appropriate
position
Uninstall the outlet valve, check the seal,
replace if warn. Remove any debris and
reinstall.
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