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16398 Rev B Updated 04/2021 © 2021 Victaulic Company. All rights reserved.
5.0 PERFORMANCE (CONTINUED)
CPVC Guidelines
Use of UL Listed CPVC Piping with Specific Application Attic Sprinklers Wet Systems Only (Continued)
CPVC at Gable/Downslope Areas Only
UL Listed CPVC Pipe and Fittings may be used to feed the Specific Application Attic Sprinklers protecting the attic
space when adhering to the following guidelines: (See Figure 37)
• Wet Systems only
• Risers are vertical and protected by Specific Application Sprinklers located at a maximum lateral distance of 12
in. (304.8 mm) from the riser centerline.
• Specific Application Sprinklers are directly mounted on the branchline.
• Specific Application Sprinklers are on arm-overs and located at a maximum lateral distance of 6 in. (152.4 mm)
from the branchline centerline.
• Specific Application Sprinklers are on vertical sprigs attached to the branchline.
FIGURE 37A: VERTICAL RISER DIRECT MOUNT
FIGURE 37B: VERTICAL RISER SPRIG UP
FIGURE 37C: DIRECT MOUNT ARM-OVER
FIGURE 37D: ANGLED SPRIG
FIGURE 37E: ARM OVER SPRIG
FIGURE 37F: VERTICAL SPRIG WITH SWING JOINT
FIGURE 37: CPVC ALLOWANCE GUIDELINES WET SYSTEMS ONLY (GABLE/DOWNSLOPE AREA)
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