HTP EFT-399 - Manual (Page 34)

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LP-387 REV. 6.10.14
B. APPROVED MATERIALS FOR EXHAUST VENT AND INTAKE PIPE
APPROVED EXHAUST VENT AND INTAKE PIPE MATERIAL
Item Material
Standards for Installation in:
United States Canada
Exhaust vent or Intake
pipe and fittings
PVC schedule 40/80 ANSI/ASTM D1785 PP, CPVC, and PVC venting must be
ULC-S636 Certified. IPEX is an approved
manufacturer in Canada, supplying vent
material listed to ULC-S636.
PVC-DWV* ANSI/ASTM D2665*
CPVC schedule 40/80 ANSI/ASTM F441
Polypropylene ULC-S636
Stainless Steel AL29-4C
Certified for Category IV and
direct vent appliance venting Certified for Category IV and direct vent
appliance venting
Pipe cement/primer
PVC ANSI/ASTM D2564
IPEX System 636 Cements & Primers
CPVC ANSI/ASTM F493
Table 10

The exhaust and intake components installed with this boiler must be used for near boiler piping BEFORE transitioning to the
approved materials listed above. DO NOT REMOVE these installed components. Doing so WILL VOID boiler warranty.

PVC/CPVC pipe and fittings of the same diameter are considered interchangeable.

Do NOT use Foam Core Pipe in any portion of the exhaust piping from this boiler.

DO NOT connect PVC/CPVC to PP without an approved vent connector.

When installing AL29-4C vent piping, install a PVC-to-stainless adapter at the boiler vent connection, and at the termination
when using an HTP PVC termination kit. DO NOT mix AL-29-4C piping from different manufacturers unless using adapters
specifically designed for the purpose by the manufacturer.

*PVC-DWV for air intake applications ONLY.
Failure to follow these directions will result in substantial property damage, severe personal injury, or death.
DO NOT mix components from different venting systems without proper adapters. The vent system could fail, causing leakage of flue
products into the living space. Use only the approved pipe and fitting materials, primer and cement, and adapters specifically designed
for the material used, as listed in Table 10. Failure to do so could result in property damage, severe personal injury, or death.
Exhaust vent adaptors are not designed as load-bearing devices, and must not be used to support exhaust vent piping. All vent pipes
must be glued, properly supported, and the exhaust must be pitched a minimum of ¼” per foot back to the boiler to allow drainage of
condensate. Failure to properly support vent piping and follow the information in this statement could result in product damage, severe
personal injury, or death.
For closet and alcove installations: CPVC, polypropylene, or stainless steel venting material MUST BE USED. Failure to follow this
statement could result in product damage, severe personal injury, or death.
NOTE: The use of double-wall vent or insulated material for the combustion air inlet pipe is recommended in cold climates to prevent
the condensation of airborne moisture in the incoming combustion air.
High heat sources (sources generating heat 100
o
F / 37
o
C or greater, such as stove pipes, space heaters, etc.) may damage plastic
components of the boiler as well as plastic vent pipe materials. Such damages ARE NOT covered by warranty. It is recommended to
keep a minimum clearance of 8” from high heat sources. Observe heat source manufacturer instructions, as well as local, state,
provincial, and national codes, laws, regulations and ordinances when installing this boiler and related components near high heat
sources.
C. REQUIREMENTS FOR INSTALLATION IN CANADA
1. Installations must be made with a vent pipe system certified to ULC-S636. IPEX is an approved vent manufacturer in Canada
supplying vent material listed to ULC-S636. Additionally you may use AL29-4C stainless steel venting to comply with Canadian
requirements.
2. The first three (3) feet of vent pipe from the boiler flue outlet must be readily accessible for visual inspection.
3. The components of the certified vent system must not be interchanged with other vent systems or unlisted pipe / fittings.