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FV251 Rev. B 7/9/18
Page 5
Note: Due to the high back pressures that can be created by concealed fixtures, this procedure must be followed when installing scored flush
tubes. Failure to follow these instructions can result in plumbing separation at the elbow.
For all Zurn concealed and concealed penal fixture valves with 1 1/2” flush connections.
When cutting scored vacuum breaker and horizontal connection tubes to fit, always leave at least 1 3/4” (32mm) of scoring to insure proper en
-
gagement with the compression coupling.
Install fixture flush connection. (Figure 1) Zurn penal flushometers are designed to connect to the stainless steel fixture in a chase behind the wall.
A 1 1/2” pipe connection (not supplied by Zurn) must be used to connect the fixture inlet to the flanged/scored horizontal tube.
Loosely assemble the concealed plumbing after placing all of the nuts, friction washers, and gaskets in place. This will locate the gaskets prior to
applying the Loctite adhesive.
Disassemble the plumbing and put a 1/8” wide bead of the adhesive around the scoring between the gasket and the end of both tubes. (Figure 2)
Make sure the tubes and elbow are clean and dry before using the adhesive. DO NOT use any other pipe sealant or lubrication on these points.
Assemble the horizontal tube to the fixure and tighten securely. Slip the elbow onto the horizontal tube rotating it as pushing in to the gasket to
spread the adhesive. Leave the elbow at an angle so the vacuum breaker tube can be inserted. Insert the vacuum breaker into the vacuum tube
and the tube into the elbow, rotating it to spread the adhesive. Screw all nuts into place and tighten. The adhesive has a limited (2 minute) working
time so tighten the connections immediately.
Figure 1
Figure 2
Scored Tubing Installaion Instructions
RUBBER
GASKET
COUPLING NUT
PLASTIC
FRICTION
WASHER
P-30
GASKET
Coupling
Nut
Pipe Connection
(1 1/2" I.P.S.)
Not Supplied by Zurn
(Supplied to
customer spec.)
Fixture
Side of
Wall