Patterson-Kelley P-K STORM ST-8000 Installation And Owner's Manual page 23

As per ANSI Z21.13b * CSA 4.9b:

The use of cellular core PVC, cellular core CPVC, or Radel
prohibited.

The use of external insulation on plastic vent pipe is prohibited.
Acceptable Venting Materials
Model Country AL29-4C 316L SS PVC CPVC
ST-2500 US Yes
ST-3000 US Yes
ST-3500 US Yes
ST-4000 US Yes
ST-5000 US Yes
ST-6000 US Yes
ST-8000 US Yes
ST-2500 Canada Yes
ST-3000 Canada Yes
ST-3500 Canada Yes
ST-4000 Canada Yes
ST-5000 Canada Yes
ST-6000 Canada Yes
ST-8000 Canada Yes
NOTE 1: When this material is used for venting, it must be listed to ULC-S636.
NOTE 2: When this material is used for venting, it must be listed to either UL-
1738 or ULC-S636 (depending on the local requirements). Consult the local
boiler codes for more information.
Revised: February 2, 2024
Released: February 2, 2024
Yes No Yes
Yes No Yes
Yes No Yes
Yes No Yes
Yes No Yes
Yes No Yes
Yes No Yes
Yes No Note 1
Yes No Note 1
Yes No Note 1
Yes No Note 1
Yes No Note 1
Yes No Note 1
Yes No Note 1
 Patterson-Kelley 2024
All Rights Reserved.
P-K Storm
Technical Service 1.877.728.5351
® as venting materials is
POLYPROPYLENE
Note 2
Note 2
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Note 1
Note 1
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Note 1
2691000403 P-K Storm ST2500-ST8000
Installation and Owners Manual Rev G.docx
®
Gas Fired Boiler
Page 12