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VGA1279AU.170403 • www.viega.com.au

Installation Guide for Viega Eco Plus 1F 

Concealed Cistern for Wall Mount Pan

Cistern Model 8108.10

A

C

G

D

H

E

F

I

J

B

Components

A  Viega Eco Plus 1F assembly.
B  Cistern access duct.
C  Flushing pipe with bend.
D  Flushing pipe – (horizontal adaptor).
E  Dust cover for flushing pipe.
F  Sewer outlet pipe (90x400mm).
G  Pan adaptor pipe
H  Dust cover for sewer outlet pipe.
I  90 to 100mm sewer adaptor ring.
J  Floor mounting hardware and pan 

mounting hardware.

Optional hardware not shown here.
 

Mounting hardware for face fixing 
to masonry. Fixing set 8173 or 
8180.73. 

623

1130

0-200

Pan not 
included

Notes on Eco Plus 1F Installation

  Cistern may be installed in stud 

framing or face mounted to 
masonry. Minimum spacing of 
623mm between studs. Studs 
must be able to support the 
applied loads. Refer to project 
engineer/details. 

  The waste outlet pipe is 90mm 

OD, therefore in 90mm cavity 
installations, accurate alignment 
of the front face of the mounting 
bracket with the front face of the 
studs is critical.

  Where the waste pipe is to 

penetrate a concrete slab floor, it 
is suggested that core drilling be 
carried out where a high degree of 
alignment accuracy is required.

  Allow for screed and tile thickness 

where applicable in all height 
calculations.

  For the correct mounting of 

flushing plates, the total thickness 
of wall linings (i.e. total of  
tiles + adhesive) must be within 
a specified range. Refer to the 
following details. 

90mm min.

framing

85mm cistern

17-100mm

cistern face

to tile face

Face Mount

Flushing Plate

Tiles + Glue

Cistern 

tank

Duct to tile face

Wall Lining

90mm min.

framing

85mm cistern

Cistern 

tank

Tiles + Glue 

5-18mm

Wall Lining

25-100mm wall 

lining thickness

Recessed 

Mounting Plate 

fixed to wall 

lining face 

before tiling

Face Mount

Flushing Plate

Recessed 

Mount

Flushing Plate

Duct to wall 

lining face

Cistern 

Mounting 

Bracket 

aligned 

with face 

of frame

Cistern 

Mounting 

Bracket 

Cistern 

Mounting 

Bracket 

aligned 

with face 

of frame

Cistern 

Mounting 

Bracket

Summary of Contents for Eco Plus 1F

Page 1: ...ity installations accurate alignment of the front face of the mounting bracket with the front face of the studs is critical Where the waste pipe is to penetrate a concrete slab floor it is suggested that core drilling be carried out where a high degree of alignment accuracy is required Allow for screed and tile thickness where applicable in all height calculations For the correct mounting of flush...

Page 2: ... with appropriate fasteners Trim waste outlet pipe to length required Mount the pipe in the support bracket and secure with the retaining clamp A 90 to 100mm adaptor Component I is supplied for the junction with the main sewer line Determine the mounting centres for the pan and fix mounting bolts in place Proceed to Step 16 Cistern Installation to Face of Masonry Wall Determine where the mains was...

Page 3: ...e plate and keep for reinstallation Unlock the mechanism retainer Push the top of the mechanism down lean the mechanism forward then reach behind and unhook the pull bar from the drain valve stem Remove the mechanism from the cistern 90 Where the water inlet line fitting cannot be rotated to join into the tank fitting unscrew the inlet tap from the through tank fitting Connect the inlet water line...

Page 4: ...ons supplied with the adaptor pipe Mains Power Electrical Installation Where mains power connection is required this must be installed by a licensed electrician prior to wall lining tiling Refer to Viega document VGA1230AU Flushing Volume Adjustment Flush volume settings are factory set and should not need adjustment To carry out adjustment of the flushing volumes remove the flushing valve from th...

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