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ASTM Standards vs. UL 1738
Currently, the use of plumbing thermoplastic products are referenced in the ANSI Z21
appliance standards as being suitable materials in FGV applications; provided that, they
are certied to specic ASTM plumbing standards and are specied by the appliance
manufacturer as an approved option for venting. However, these ASTM Standards are for
uid handling applications only. For example, ASTM D1785 is a standard for pressure rated
Schedule 40, 80, and 120 PVC pipe intended for use with distribution of pressurized liquids
only. In fact, the 2015 standard states:
“This standard species dimensional, performance and test requirements for plumbing
and uid handling applications only. It does not include provisions for the use of these
products for venting of combustion gases. UL 1738 is a standard that does include
specic testing and marking requirements for ue gas venting products, including PVC”
ASTM D1785-15 Standard reference.
Stan-
dards
Description
ABS
Foam-
core
ABS
PVC
Foam-
core
PVC
PVC
DWV
System 1738
®
ASTM
D1785
Schedule 40, 80 and 120 PVC,
Pressure Rated for Water
ASTM
D2665
PVC Drain Waste Vent (DWV)
Pipe and Fittings
ASTM
F891
PVC Pipe with a Cellular Core
for Non Pressure
ASTM
D2241
PVC Pressure Rated Pipe -
SDR Series
ASTM
D2661
ABS Schedule 40 Pipe and
Fittings
ASTM
F628
ABS DWV Schedule 40 Pipe
with a Cellular Core
UL 1738
Vent Systems for Gas-Burning
Appliances Categories II and IV
Not Recommended or warranted in a FGV installation
|
Recommended and warranted in a
(ASTM Standards are for liquid handling applications only) FGV installation
Plumbing Product Standard vs. FGV Installation
5