46.02
16397 Rev A Updated 03/2021 © 2021 Victaulic Company. All rights reserved.
5.0 PERFORMANCE (CONTINUED)
CPVC Guidelines
Use Of Ul Listed Cpvc Piping With Globe Specific
Application Attic Sprinklers (Wet Systems Only)
UL Listed CPVC piping may be used in a combustible
concealed attic space requiring sprinklers when installed
in accordance with the following guidelines. For clarity,
the following guidlines reference both "Ridgeline/
Downslope" areas as well as "Hip" areas. Refer to Figure
1 on page 1 for explanation of these areas.
Notice: For installations in accordance with Figure 31,
where the use of non-combustible insulation is specified,
verify with the insulation manufacturer as to the non-
combustibility of the insulation. The non-combustible
insulation (fiberglass) may be faced or unfaced. Where
faced, the facing need not be non-combustible. The
insulation is to have a flame spread index of not more
than 25. Verify chemical compatibility of the insulation
with the UL Listed CPVC by consulting the CPVC
Manufacturer's literature.
CPVC At Bottom Chords To Feed Ceiling Sprinklers Below
UL Listed CPVC may be used to feed the wet system
ceiling sprinklers on the floor below when adhering to
the following guidelines: (See Figure 31)
• There must be 6 in. (152.4 mm) of non-combustible
insulation covering the horizontal or vertical pipe
extending 12 in. (304.8 mm) on each side away
from the centerline of the pipe. Refer to Figure 29A.
• The area above the pipe must be protected with
FL-SA/RE and FL-SA/DS Special Application Attic
Sprinklers. If the pipe is located inside the ceiling
joist, the joist channel must be covered or filled
with 6 in. (152.4 mm) of non-combustible insulation
on top of the pipe and the area above must be
protected by FL-SA/RE and/or FL-SA/DS Sprinklers.
Refer to Figure 29B. Insulation is for fire protection
purposes. It is not freeze protection. CPVC
must be installed in accordance with the CPVC
Manufacturer's installation guide instructions.
FIGURE 31A
FIGURE 31B
FIGURE 31: NON-COMBUSTIBLE INSULATION FOR
THE PROTECTION OF CPVC PIPE
26
