Installation Guide
Polypropylene (PP) Common Venting Installation Instructions            3 
Copyright © 2018 Rinnai America Corporation. All Rights Reserved.  
READ ALL INSTRUCTIONS BEFORE INSTALLATION 
•  If the informaon in these instrucons is not 
followed exactly, a re or explosion may result 
causing property damage, personal injury, or 
death. 
•  Do not store or use gasoline or other ammable 
vapors and liquids in the vicinity of this or any 
other appliance. 
•  WHAT TO DO IF YOU SMELL GAS: 
−  Do not try to light any appliance. 
−  Do not touch any electrical switch; do not 
use any phone in your building. 
−  Immediately call your gas supplier from a 
neighbor’s phone. Follow the gas supplier’s 
instrucons. 
−  If you cannot reach your gas supplier, call 
the re department. 
•  Installaon and service must be performed by a 
qualied installer, service agency or the gas 
supplier. 
•  The warning signs in this manual are here to 
prevent injury to you and others. Please follow 
them explicitly.  
•  Installaons must comply with local 
requirements and with the Naonal Fuel Gas 
Code, ANSI Z223.1/NFPA 54 for U.S. 
installaons.  
•  Use only the materials listed in this manual for 
vent, air intake pipe, and ngs. Failure to 
comply with this warning could result in 
property damage.  
•  DO NOT slope the combuson air pipe toward 
unit. Failure to comply with this warning could 
result in property damage, personal injury, or 
death. 
•  DO NOT apply PVC/CPVC glues, solvents, or 
cleaners to the tankless water heater’s intake or 
exhaust gasket connecons. Failure to correctly 
assemble the components according to these 
instrucons and the Rinnai water heater 
installaon and operaon manual may result in 
property damage, personal injury, or death.  
 WARNING 
Safety Symbols 
Indicates an imminently  
hazardous situaon which, if 
not avoided, will result in  
personal injury or death.  
Indicates a potenally  
hazardous situaon which, if 
not avoided, could result in 
personal injury or death. 
Indicates a potenally  
hazardous situaon which, if 
not avoided, could result in  
minor or moderate injury. It 
may also be used to alert 
against unsafe pracces. 
Safety alert symbol. Alerts you to potenal  
hazards that can kill or hurt you and others. 
 DANGER 
 CAUTION 
 WARNING 
This manual contains the following important safety 
symbols. Always read and obey all safety messages.  
Safety 










