A.O. Smith T-H3S-DV Installation Manual And Owner's Manual page 17

-Single pipe with room-air intake illustrations-
Typical installations using PVC, ABS, or polypropylene vent
Horizontal Installation
Hanger
Elbow
Connect between exhaust vent collar and piping.
See the instructions below.
For details of the optional items, refer to the Installation manual for each Optional item.
<How to install single vent with the indoor models>
3" vent connection
1. Connect a 3" elbow directly
on the intake vent collar of the
water heater.
2. Connect a 3" coupling directly
on the exhaust vent collar of the
water heater.
3. Connect a 3" straight pipe to
the coupling.
From 3" to 4" vent connection
1. Connect a 3" elbow directly
on the intake vent collar of the
water heater.
2. Connect a 3"x4" increaser directly
on the exhaust vent collar of the
water heater.
3. Connect a 4" straight pipe to the
increaser.
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Vertical Installation
Wall
Roof
Elbow
3" elbow with
bird screen
Intake vent collar
(Female)
3" elbow with
bird screen
Intake vent collar
(Female)
17
Page
Installation Manual
Installation
Roof
flashing
Fire stop
3" straight pipe
3" coupling
Exhaust vent collar
(Female)
4" straight pipe
3"x4" increaser
Exhaust vent collar
(Female)