34
It is acceptable to install a 90 degree elbow on IPEX concentric vent terminations use with this power direct
vent water heater (see Figure 23B). A short length of appropriate diameter vent pipe should be used to
transition from the vent terminal to the 90 degree elbow. Approved venting materials along with primers and
cements are listed at the beginning of this venting section. When the 90 degree elbow is used the equivalent
length of the elbow and short length of vent pipe must be factored into the total vent/air intake pipe
determinations (see Tables 3 and 4 for appropriate vent connector lengths).
WARNING! DO NOT USE 2” VENT WITH EF100T250/300 MODELS
Figure 23B
VENT PIPE PREPARATION
WARNING
DO NOT attempt to start this water heater until vent pipe solvent fumes completely clear
from the room and inside the vent piping.
(A) VENT DIAMETER (B) DIMENSION
MIN MAX
2” (5.1 CM) 12” (30.5 CM) 40” (101.6 CM)
3” (7.6 CM) 12” (30.5 CM) 44” (111.8 CM)