Installation Guide

Polypropylene (PP) Common Venting Installation Instructions 4
Copyright © 2018 Rinnai America Corporation. All Rights Reserved.
The Common Vent system provides longer vent lengths
and fewer wall or roof penetraons than convenonal
single-unit venng.
Features include:
• 3”, 4” and 6” common vent PPTL common vent
components are approved for use in the U.S. only
and not available for installaons in Canada.
• Canadian common vent installaons must use 6”
PPS (gray) common vent components.
• Cered to ANSI Z21.10.3 - CSA 4.3 for U.S. and
Canadian installaons.
• Cered for use with:
̶ CU199i (REU-N3237FFC-US)
̶ CU160i (REU-N2530FFC-US)
̶ RU199i (REU-N3237FF-US)
̶ RU180i (REU-N2934FF-US)
̶ RU160i (REU-N2530FF-US)
̶ RU130i (REU-N2024FF-US)
̶ RUR199i (REU-NP3237FF-US)
̶ RUR160i (REU-NP2530FF-US)
̶ Demand Duo (CHS199100CU)
• Venng material is comprised of Polypropylene
(PP). For the exhaust ue, U.S. installaons ulize
PPTL — a CSA-cered and tested venng material.
Canadian installaons ulize PPS, a ULC-S636-
cered and tested venng material from Ubbink.
• The various secons are self locking and sealing and
can be pushed together without use of cement or
glue.
Exhaust components must be propylene (PP/PPTL) for
U.S. installaons and PPS for Canadian installaons.
All venng components used in Canada must be ULC-
S636 cered.
Intake components to be in accordance with naonal
and/or local codes having jurisdicon.
WARNING
Venting Guidelines
Do Not
• Do not install in separate distribuon systems. All
water heaters common vented must be in the same
hot and cold plumbing manifolds and must not exceed
the maximum number of units indicated in the Rinnai
installaon and operaon manual.
• Do not use cellular core PVC/CPVC, Radel, ABS or
galvanized material for the exhaust vent.
• Do not combine vent components from dierent
manufacturers.
• Do not connect the venng system with an exisng
vent or chimney.
• Do not cover vent components with thermal
insulaon.
• Do not common vent with the vent pipe of any other
type of water heater or appliance.
• Do not reduce vent diameter to less than 2”.
• Do not install the water heater in an area of negave
pressure.
• Do not install the water heater, venng, and vent
terminaon(s) in any areas where the air may contain
corrosive compounds.
About the Common Venting
System