Install Instructions
Viega IM-MTL 0612
724607
46
16.1 Clearance Requirements
Minimum clearance requirements
for the pressing process
The minimum clearance required
between two tubes and between the
tubing and any permanent structure
must be taken into consideration.
The minimum allowable values are
specified in Tables 16.1 and 16.2.
Minimum clearance requirements
for the pressing process in front of
and behind structural components
When press connections are
performed directly in front of or
behind penetrations in walls/floors,
adequate space must be available for
the RIDGID pressing tools. The
minimum space requirements are
listed in Table 16.3.
Minimum clearance between two
press connections
To ensure proper sealing of the press
connections, the minimum spacing
between press connections must be
maintained (see Table 16.4).
Note: For installations where the
minimum distance is 0, it is
particularly important to ensure the
correct insertion depth of the tubing
into each fitting.
a
b
Table 16.1: Space requirements for
press jaws between tubes
Tube O.D. A B
Ø inch (mm) inch (mm)
1/2" 3/4 (19) 1-5/8 (41)
3/4" 7/8 (22) 2-1/8 (54)
1" 1 (26) 2-1/2 (64)
1-1/4" 1-1/8 (29) 2-7/8 (73)
1-1/2" 1-3/4 (45) 3-1/2 (89)
2" 2 (51) 4-3/8 (111)
16. INSTALLATION REQUIREMENTS
Tube
Size
Minimum space requirement,
a
min
for press tools
CT400
Press Tool
inch (mm)
320-E Battery
Press Tool
inch (mm)
1/2" to 2" 1-3/4 (45) 2 (50)
a
min
Table 16.3: Space requirements for
press tools when making connections
in front of/behind penetrations in
walls/floors
Tube O.D. A B C
Ø inch (mm) inch (mm) inch (mm)
1/2" 7/8 (22) 1-3/8 (35) 2-1/2 (64)
3/4" 1 (26) 1-1/2 (38) 2-1/2 (64)
1" 1-1/8 (29) 1-3/4 (45) 3 (76)
1-1/4" 1-1/4 (32) 2-1/4 (73) 3-1/8 (80)
1-1/2" 1-7/4 (48) 2-1/2 (64) 3-3/4 (95)
2" 2-1/8 (54) 3-1/8 (80) 5 (127)
a
c
b
Table 16.2: Space requirements for
press jaws between pipe and wall/
floor structure
16.2 Protection of Tubing
When copper tubing for fuel gas
piping systems is run through studs
or joists, the tubing must be
protected from the possibility of an
inadvertent nail puncture when the
tubing is located within 1-3/4" of
the finished wall. See Figure 16.1 for
more information. Safety plates must
be a minimum of 18 gauge in
thickness and must be installed to
protect the tubing from punctures.
Safety plates are premanufactured
and available from various
companies. Copper tubing installed
vertically through partition walls must
not be supported within the wall
space except at the floor or ceiling.
Safety plates must be AGA approved
striker plates of steel pipe of at least
.0508" thick and extended a minimum
of 4" beyond concealed penetrations of
floor/ceiling. Plates must be installed to
protect the tubing.
Tubing installed at right angles or
Outer Diameter
(inch)
Minimum clearance
a inch (mm)
1/2 0 (0)
3/4 0 (0)
1 0 (0)
1-1/4 7/16 (11)
1-1/2 5/8 (16)
2 3/4 (19)
a
Table 16.4: Minimum spacing between
press connections