State 520 - Manual (Page 14)

Installation
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Page
1. Connect a 4” PVC Straight pipe directly on the intake vent collar of the water heater.
2. Connect a 4x3” PVC reducer to the 4” PVC Straight pipe.
3. From the reducer, continue on the rest of the vent run with 3” PVC pipe.
(For Intake: 4” only)
(For Intake: 3” only)
 Regarding the clearances from the exhaust terminator to
the air inlet or opening, refer to the next few pages.
 Follow all vent system manufacturer’s instructions and all
local codes.
 Do not common vent or connect any vent from other
appliances to the Direct Vent Indoor models vent.
 Use 4” Category III/IV approved or Special BH, single or
double wall stainless steel vent pipe.
Vertical Installation Diagram Horizontal Installation Diagram
*PVC adaptor is included with the Direct Vent Indoor models.
4” vent connection Diagram 3” vent connection Diagram
‐Stainless steel Venting Illustrations‐
1. Connect a 4” PVC Straight pipe directly on the intake vent collar of the water heater.
Roof Flashing
Roof
Rain Cap
Fire stop
Wall
Sidewall Vent
Terminator
Exhaust vent collar
of the Direct Vent
Indoor models
(Female)
PVC adaptor*
4” PVC coupler
4” PVC Straight pipe
4” PVC Straight
pipe
Intake vent collar
3” PVC Straight pipe
4x3” PVC reducer
PVC adaptor*
3” PVC Straight
pipe
4x3” PVC reducer
4” PVC Straight
pipe
Intake vent collar
Exhaust vent collar
of the Direct Vent
Indoor models
(Female)