Example$A:$Typical$Horizontal$Termination$
w/$1/4”$per$foot$DOWNWARD$Slope
13
Installing$the$water$heater:
94° Elbow Wall Plate
Water
Heater
Horizontal Vent
Te
rmination
Exterior
Wall
Interior Wall
Condensate
Drain Line
Connection
Mounting
Brackets
Side View
Caulk for
W
eather Seal
Side'View
WARNING:$Use$
Rheem$approved$Category$
III$vent$material$only.$No$
other$vent$material$is$
permitted.
CAUTION:$Refer$to$the$
vent$manufacturer’s$
installation$instructions$as$
design$might$vary$from$
manufacturer$to$
manufacturer.
Horizontal$Vent$Installation$continued.
Determine'the'heater'location'and'
wall'construction'for'correct'screw'
and'anchor'selection.'If'mounting'on'
drywall/wallboard'it'is'recommended'to'
locate'the'wall'studs'and'secure'a'1/2'or'
3/4"'plywood'backing'plate'to'the'wall'
studs.'
Use'4'hollow'wall'anchors,'at'least'
1/8'inch'(0.32'cm)'in'diameter'and'of'
appropriate'length'for'the'sheathing'or'
other'composite'material.'
'
Use'4'#10x1E1/4”'wood'screws'for'
plywood,'solid'wood'sheathing'or'
members.'Use'suitable'masonry'anchors'
for'mounting'to'cement'block'or'solid'
concrete'walls.
Temporary'hang'the'heater'using'the'
top'mounting'screws'secured'leaving'
approximately'1/4"'(0.64cm)'from'wall.'
Determine'the'vent'requirements'and'
the'vent'exit'point'and'center'mark'this'
location.'If'the'heater'is'below'the'vent'
exit'remove'it'from'the'wall'and'place'it'
in'a'safe'area'while'the'vent'opening'is'
made.
Create'a'6"'diameter'hole'to'allow'
the'vent'to'pass'without'deformation'
or'resistance.'Clean'debris'from'the'
opening'and'hang'the'heater'and'secure'
all'four'mounting'screws.
Dry'fit'the'entire'vent'system'from'the'
heater'to'the'vent'termination'including'
the'wall'plates.'Make'any'corrections'if'
any'vent'adjustments'are'required.
Disconnect'the'venting'and'reassemble'
according'to'the'vent'manufactures'
recommendations.'When'fully'engaged'
at'the'seams'the'female'end'will'
overlap'the'male'end'a'minimum'1'
inch'(25.4mm).'Use'three'self'tapping'
screws'at'each'outer'pipe'seam.'Seal'
each'overlapping'area'of'the'outer'pipe'
with'silicone'if'required'by'the'vent'
manufacture.
Apply'silicone'sealant/latex'caulk'around'
the'vent'section'where'it'passes'through'
the'wall'plate'and'around'the'wall'plate'
to'keep'moisture'outside'the'building.
Maintain'vent'clearances'and'install'
vent'supports'as'required'by'the'vent'
manufacturer.'
Support'method'used'should'maintain'
clearance'and'isolate'the'vent'pipe'from'
floor'joist'or'other'structural'members'
to'help'prevent'the'transmission'of'noise'
and'vibration.'
downward slope
1/4" per foot
Ceiling
Vent Pipe
Wall Plates
Board
Inspection
Fire
Stop
Access Panel #1
Inspection
Access
Panel #2
94° Elbow
(optional)
(optional)
12” (min)
(30 cm)
AP15317 (10_09) DV Gas Manual 10 30 09.indd 13 11/9/2009 3:10:26 PM