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Twin Pipe PVC/CPVC Vent Installatio
Installatio s must comply with local requirements and with the Nati nal Fuel Gas Code, ANSI Z223.1/NFPA 54 for U.S.
installatio s or CSA B149.1 for Canadian installatio s. DO NOT use cellular core PVC, CPVC, or Radel based pipe materials
for the exhaust vent. Vents MUST be of solid core pipes ONLY.
Use only the materials listed in this sectio for vent, air intake pipe, and fi
Failure to comply with this warning could result in property damage, personal injury, or death.
PVC venting cannot be used if the water heater is installed in a recirculatio system and the thermostat se
than 150° F (65.5 °C).
20
WARNING
WARNING
gs (See vent and air piping materials table).
NOTICE
KBP Series Manual
g is greater
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