46.03
16398 Rev B Updated 04/2021 © 2021 Victaulic Company. All rights reserved.
5.0 PERFORMANCE (CONTINUED)
CPVC Guidelines
CPVC at Hip Areas
Listed CPVC may be used to feed the FL-SA/GAP and FL-SA/DS sprinklers protecting the Hip areas when adhering
to the following guidelines:
• Wet systems only
• When the horizontal branchline piping feeding sprinklers within the hip roof areas is run over the bottom chords
of the trusses, it shall be covered with a minimum of 6 in. (152.4 mm) in depth of non-combustible insulation
(See Figure 38). This insulation must extend nominally 12 in. (304.8 mm) on each side away from the centerline
of the CPVC branchline. Insulation is for fire protection purposes. It is not freeze protection.
• When the horizontal CPVC branchline piping feeding the sprinklers within the hip roof areas is located within
the ceiling joist, the joist channel must be covered or filled with a minimum of 6 in (152.4 mm) depth of
noncombustible insulation on top of the branchline feeding the sprigs (See Figure 39). Insulation is for fire
protection purposes. It is not freeze protection.
• A minimum lateral distance of 18 in (450 mm) is maintained between the CPVC pipe and a heat producing
device such as heat pumps, fan motors, and heat lamps.
• The sprinklers (GAP or DS) may be directly fed by exposed vertical or angled sprigs provided:
• Vertical sprigs have no maximum exposed length, the GAP or DS Sprinkler is located at a maximum lateral
distance of 12 in (3304.8 mm) from the sprig centerline.
• Angled sprigs with a maximum exposed length of 3 ft. (0.9 m).
FL-SA/GAP or
FL-SA/DS
FL-SA/GAP or
FL-SA/DS
FIGURE 38A: VERTICAL SPRIG
FIGURE 39A: VERTICAL SPRIG
FL-SA/GAP or
FL-SA/DS
FL-SA/GAP or
FL-SA/DS
FIGURE 38B: ANGLED SPRIG
FIGURE 39B: ANGLED SPRIG
FIGURE 38: EXPOSED CPVC AT HIP ROOF AREAS
(HORIZONTAL BRANCHLINE OVER JOISTS)
WET SYSTEMS ONLY
FIGURE 39: EXPOSED CPVC AT HIP ROOF AREAS
(HORIZONTAL BRANCHLINE WITHIN JOISTS)
WET SYSTEMS ONLY
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