Freestyle 2 Series - Page 17

Figure 21 Vent and air piping materials — Use only the materials listed below, ensuring that all materials meet local
codes (see Figure 164, page 121 for part/kit numbers)
Part number 550-142-950/0122
17
FreeStyle
®
series 2 wall mount gas-fired water boiler – boiler manual
6 Venting/air piping — general continued
ALL vent and air pipes require a BIRD SCREEN at each termination. Most kits do not include
the bird screens. Purchase bird screens separately from Williamson-Thermoflo or vent kit sup-
plier if not included. [Note — bird screening is integral to the 3” PVC W- T sidewall vent cap,
available for purchase from Williamson-Thermoflo . No additional screening is required.]
USE SWEEP ELBOWS FOR ALL VENT AND AIR PIPING — DO NOT use short
radius elbows for vent or air piping. Boiler performance could be affected.
Item Material
Standards for installations in:
United States
Plastic piping materials Vent or air piping
Vent or air pipe
&
ttings
PVC schedule 40 (Note 1) ANSI/ASTM D1785/UL1738
PVC-DWV schedule 40
(Note 1) ANSI/ASTM D2665
CPVC schedule 40
(Note 1) ANSI/ASTM F441
ABS-DWV schedule 40 (Intake Only) ANSI/ASTM D2661
PVC & ABS pipe
cement & primer
PVC (Note 1) ANSI/ASTM D2564/F656/UL1738
CPVC
(Note 1) ANSI/ASTM F493
ABS schedule 40 (Note 1) ANSI/ASTM D2235
Polypropylene
vent pipe, ttings,
terminations and
cement
Simpson-Duravent — Obtain all materials from M&G
Simpson-Duravent
Centrotherm Eco Systems InnoFlue® Single-
wall — Obtain all materials from Centrotherm
See manufacturer’s literature for detailed information
MUST USE LOCKING COLLAR ON EVERY JOINT
AL29-4C stainless steel piping materials
Vent pipe
AL29-4C
stainless
steel
Heat Fab, Inc. — Saf-T-Vent
®
Z-Flex, Inc. — Z-Vent II
Dura-Vent — FasNSeal®
Metal-Fab, Inc. — CORR/GUARD
Certied for direct vent appliance venting
Stainless steel bird screens, 2” or 3” (purchase separately) — see Figure 164, page 121 for part numbers
Note 1: Williamson-Thermoflo concentric vent kits are made
from PVC pipe and fittings.
Note 2: If UL1738 compliance is required, use only System
1738 pipe, fittings and cement.
DO NOT mix piping from different pipe manufacturers
unless using adapters specifically designed for the
purpose by the manufacturer.
Every joint on polypropylene vent piping must
include a locking collar.
DO NOT use cellular core PVC (ASTM F891), cellular
core CPVC, or Radel
®
(polyphenolsulfone) in vent-
ing systems.
DO NOT cover non-metallic vent pipe and fittings
with thermal insulation.
ADAPTERS – The boiler comes with a 3”,
3-in-1 adapter as standard. This adapter allows the
installation of 3” PVC schedule 40, CPVC schedule 40,
PVC-DWV schedule 40, AL29-4C stainless steel and
Polypropylene (from Simpson-Duravent only) piping
without the need for extra adapters.
It may require an adapter at terminations.
If your venting system uses Centrotherm Eco systems
InnoFlue single wall material, then an approved
adapter is required.
If using 2” piping (FS-80/120 only), where approved
for the application, provide adapters for a 3” pipe
material (mentioned above) connections and at the
terminations, if required.