Installation Guide

Rinnai Tankless Water Heater Installation and Operation Manual 33
Table 9. Various 2 in. or 3 in. Schedule 40
PVC/ CPVC Terminations
Vent Screen N/A N/A
Tee 5  5 
90° Elbow 6  5 
45° Elbow 3  2.5 
Table 10. Acceptable and
Not Acceptable Elbows
Acceptable Acceptable
Not
Acceptable
90° Elbows,
Long Sweep
90° Elbows,
Short Sweep
90° Elbows,
Close Turn
Table 11. Approved PVC/CPVC Vent and Air Piping Material
Approved PVC/CPVC Vent and Air Piping Material
Item Material
Standard for Installation in North America
United States Canada
Thermoplastic Piping Materials
Air Intake and Exhaust
Pipe and Fittings
PVC Schedule 40 ANSI/ASTM D1785
Thermoplastic vent pipe
must be certified to ULC
S636. Intake pipe may
be of the materials listed
in this table.
PVC-DWV ANSI/ASTM D2665
CPVC Schedule 40 ANSI/ASTM F441
PVC Pipe Cement and
Primer
PVC ANSI/ASTM D2564
CPVC Schedule 40 ANSI/ASTM F493
Non-Metallic Vent Material
Vent or Air Intake Pipe
and Fittings
ABS SCH 40 DWV
ASTM-D2661 or CSA
B181.1
NOT PERMITTED
(FOR EXHAUST)
PVC Vent Screens
Termination Vent
Screens
Polyethylene
2 in. Vent Screens (included in carton box)
(IPEX Part Number: 196050)
3 in. Vent Screens (IPEX Part Number: 196051)
Exhaust piping must be of solid core material. Refer to the PVC/CPVC manufacturer for
appropriate ngs, solvents or joining methods.
Table 12. Approved Venting Materials By Manufacturer
Manufacturer Vent Material
Ubbink PVC (Outer Vent), Polypropylene (Inner Vent)
Centrotherm Polypropylene
Heat-Fab Stainless Steel
Metal Fab Galvanized steel (Outer Vent), Stainless Steel (Inner Vent)
IPEX PVC/CPVC
DuraVent Polypropylene
Royal PVC
ECCO Manufacturing Polypropylene
DiversiTech PVC/CPVC
Product
Descripons
Diagram
Horizontal
Vercal
2 in.
Equivalent
Length
3 in.
Equivalent
Length