44
• Do not store hazardous or flammable sub-
stances near the vent terminal,
• Slope the intake and exhaust pipes at a 1/50
grade down towards the termination.
• Use only UL listed Category III venting products.
• Connect the vent pipe firmly so that it will prevent
exhaust gases from leaking.
• Steam or condensed water may drip out of the
vent terminal.Dispose of this condensed water
according to local codes and in order to prevent
injury or property damage.
• If this product will be installed in an area where
snow is known to accumulate,protect the vent
termination from blockage by snow drifts or dam-
age from snow falling off of roofs.
• Support the vent pipe with hangers at intervals
as required by the vent pipe manufacturer ’s in-
stallation instructions.
• Install the vent terminal so that it is easily
accesible for maintenance both from the indoors
and the outdoors.
• If the vent terminal will be installed higher than
the water heater,make the vertical section di-
rectly above the water heater as short as
possible,and slope down to the terminal. Do not
have another vertical section after the horizontal
section begins.
• Make the vertical pipe as short as possible.
Venting Precautions
• Use 4" diameter Category III vent pipe.
• Maximum vent length
• Exceeding the maximum vent length is danger-
ous and may result in bad combustion.
• If possible,don ’t install the vent pipe through any
enclosed areas.If necessary,consult the pipe
manufacturer ’s instructions for clearances.
• Install the vent terminal so that all exhaust is di-
rected to and all intake air is taken from out-
doors.
Number of 90
degree elbows
4
3
2
1
Maximum
Vent Length
39'
45'
51'
57'
• Do not common vent or connect more than
one appliance to this venting system.
Appliance Adapters
• Use the following adapters to connect the
unit to the venting system.
These clearances are subject to change.
Refer to the UL listing for the proper clearances.
Manufacturer and
Product
Protech FasNSeal
FSAA4
HeatFab SafTVent
9401RYPK
Z-Flex Z-Vent
2SVWA04
Flex-L StaR-34
SRASPSA4
Part No.
• Follow the vent pipe manufacturer's installation
instructions.
• Maintain the same vent pipe diameter all the
way to the end.
• Maintain the following clearances for the
exhaust pipe to combustibles:
• Terminate at least 12"above grade or snow line
• Terminate at least 7'above a public walkway
• Use a condensation drain if necessary
Manufacturer and
Enclosed
Unenclosed
Product
Hor. Vert.
Hor.
Vert.
Noritz N-Vent
4"
3"
3"
Protech FasNSeal
4"
3"
3"
Protech FasNSeal W2
6"
4"
3"
3"
HeatFab SafTVent
6"
6"
2"
2"
Z-Flex Z-Vent
8"
4"
1"
1"
Flex-L StaR-34
8"
4"
1"
1"
8" (sides)
12"(top)
4"(bottom)
10" (sides)
15"(top)
6"(bottom)
