D. Secure the Vent Sections
•Vertical runs of DVP pipe must be supported every 8 ft. (2.44 m) after the 25 ft. (7.62 m) maximum unsupported rise.
•Vertical runs of SLP pipe must be supported every 8 ft. (2.44 m).
•Horizontal sections of vent must be supported every 5 ft. (1.52 m) with a vent support or plumber’s strap.
•Wall shield firestops may be used to provide horizontal support.
•Vent support or plumber’s strap (spaced 120° apart) may be used for support. See Figures 10.8 and 10.9.
•SLP ceiling firestops have tabs that may be used to provide vertical support.
WARNING! Risk of Fire, Explosion or Asphyxi- ation! Improper support may allow vent to sag and separate. Use vent run supports and connect vent sections per installation instructions. DO NOT allow vent to sag below connection point to appliance.
Figure 10.8 Securing Vertical Pipe Sections
Figure 10.9 Securing Horizontal Pipe Sections
E. Disassemble Vent Sections
•Rotate either section (see Figure 10.10) so the seams on both pipe sections are aligned as shown in Figure 10.11.
•Pull carefully to separate the pieces of pipe.
Figure 10.10 Rotate Seams for Disassembly
Figure 10.11 Align and Disassemble Vent Sections
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