Viega 2842.5 User manual

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User Guide
Viega Flash Shower Valve
Model 2842.5
UG-PP 530594 0520 Flash Shower Valve 2842-5
Viega products are designed
to be installed by licensed and
trained plumbing and mechanical
professionals who are familiar with Viega
products and their installation.
Installation by non-professionals may
void Viega LLC’s warranty.
Recommended Tools
This document is subject to updates.
For the most current Viega technical
literature please visit www.viega.us.
To avoid shower rise or other related
issues, do not use PEX connections
at the tub outlet connecting to the
tub spout.
To ensure that your installation
proceeds smoothly, please read these
instructions carefully before you begin.
Compatible only with American
Standard pressure balance tub/shower,
shower only and valve only trims.
Visit www.americanstandard-us.com for more
information.
■ Phillips screwdriver
■ Flat blade screwdriver
■ Tubing cutter
■ Adjustable wrench
■ Channel locks
■ Plumber’s putty or caulking
Roughing-in Dimensions
To assure proper positioning in relation to wall,
note roughing-in dimensions.
犈犈
煍煍
Finished Wall ½ NPT
½ NPT
Top of tub rim
Bottom of tub
Optional to
finished floor
usually between
65 to 78
4
⅞ to 2
2¾ max.
1¾ min.
Inlets:
½ Stub Out
Outlets:
½ Stub Out

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Viega Flash Shower Valve User Guide
UG-PP 530594 0520 Flash Shower Valve 2842-5
For back to back installation, follow
steps mentioned above. Reversal
of Hot/Cold water supplies is
accomplished by rotating cartridge (supplied
with trim) 180° during installation.
CAUTION!
After valve installation, inspect the
VALVE BODY for any debris. It can
damage Pressure Balance Valve cartridge.
CAUTION!
Turn off hot and cold water supplies
before beginning.
■ See Roughing-in diagram before starting.
■ Remove the PLASTER GUARD (8) for proper
installation.
■ Mount VALVE BODY to cross brace (2 x 4)
with-in wall. Use wood screws to secure
VALVE BODY to brace.
■ Connect HOT and
COLD water supplies.
See ProPress ½ to 2
Product Instructions
to make a ProPress
connection.
Standard Wall Installation ■ Connect RISER PIPE (1) to VALVE BODY (2)
top outlet marked “UP”.
■ Connect TUB FILLER PIPE (3) to bottom outlet.
■ Install PLASTER GUARD (8) back onto the
valve. Only remove PLASTER GUARD (8)
when ready to install trim Kit.
■ Finished wall should allow for a 4 diameter
opening (Use PLASTER GUARD for guidance)
To avoid shower rise or other related
issues, do not use PEX connections at the
tub outlet connecting to the tub spout.
Cross Brace
Cold
Hot
Wood
Screws
1
2
6
3
8
Side View
3½
4
2 x 4
Cross
Braces
⅞ to 2
2¾ max.
1¾ min.
ProPress ½ to 2
Product Instructions

3 of 4
Viega Flash Shower Valve User Guide
UG-PP 530594 0520 Flash Shower Valve 2842-5
For back to back installation, follow
steps mentioned above. Reversal
of Hot/Cold water supplies is
accomplished by rotating cartridge (supplied
with trim) 180° during installation.
CAUTION!
After valve installation, inspect the
VALVE BODY for any debris. It can
damage Pressure Balance Valve cartridge.
CAUTION!
Turn off hot and cold water supplies
before beginning.
Thin Wall Installation
■ See Roughing-in diagram before starting.
■ Finished wall should allow for a 3½ diameter
opening (Use PLASTER GUARD for guidance).
■ Remove PLASTER GUARD (8), rotate 90˚
counter clockwise and install the two screws.
(Thin wall text should be on top)
■ Use SELF-CENTERING HOLE GUIDES (9) as
a guide for thin wall install.
■ LOCKING SCREW (10) keeps valve in place
when installing. Completely Thread LOCKING
SCREW (10) onto PLASTER GUARD (8).
■ During the installation, make sure to position
the Locking feature screw as shown in Figure
A below. Once the valve is positioned on the
Thin Wall, turn counterclockwise as shown in
Figure B to secure VALVE BODY (2) in place.
■ Connect HOT and
COLD water supplies.
See ProPress ½ to 2
Product Instructions
to make a ProPress
connection.
■ Connect RISER PIPE (1)
to VALVE BODY (2) top
outlet marked “UP”.
■ Connect TUB FILLER
PIPE (3) to bottom outlet.
Side View
3½
1
2
8
9
10
10
10
3
Hot
Fig. A
Fig. B
Unlock
Lock
Cold
Hex
Wrench
4 mm
6
ProPress ½ to 2
Product Instructions

Viega LLC
585 Interlocken Blvd.
Broomfield, CO 80021
Phone [phone]
www.viega.us
Viega Flash Shower Valve User Guide
UG-PP 530594 0520 Flash Shower Valve 2842-5
Test Procedures For Flush Plug
■ Valve comes with Flush Plug that allows
hot and cold supply lines to be 󶈶ushed
independently (without cross 󶈶ow).
■ Flush plug is shipped in Orientation A.
■ ORIENTATION A directs cold water
through the shower port and hot water
through the tub port.
■ Flush plug can be reversed to Orientation B.
■ ORIENTATION B directs cold water
through the tub port and hot water
through the shower port.
■ For shower only installation 󶈶ush cold supply
line 󶈵rst in Orientation A. Then reverse to
Orientation B and 󶈶ush hot supply line.
Alternatively, the 󶈶ush plug can be removed
entirely to 󶈶ush water through the valve body.
■ To switch between orientations follow these
steps:
■ Unthread BONNET NUT (1).
■ Rotate FLUSH PLUG (2) 90 degrees to
desired orientation.
■ Rethread BONNET NUT (1).
■ Upon completion of 󶈶ushing both hot and
cold supply lines unthread BONNET NUT
(1), remove FLUSH PLUG (2), and rethread
BONNET NUT (1).


Shower
Tub
Hot Cold
2
Shower
Tub
Hot Cold
2
Orientation A (as shipped)
Orientation B