Installation Sheet

16 Page
<How to install PVC venting with the Direct Vent Indoor models>
3"ventconneconDiagram
(For 3" only)
From3"to4"ventconneconDiagram
(From 3" to 4")
-Exhaust vent (Stainless steel vent)-
ThisisaCategoryIVapplianceandmustbeventedaccordingly.Theventsystemmustbesealedairtight.
All seams and joints without gaskets must be sealed with high heat resistant silicone sealant or UL listed
aluminum adhesive tape having a minimum temperature rating of 160°F. For best results, a vent system
should be as short and straight as possible.
• TheDirectVentIndoormodelsareaCategoryIVapplianceandmustbeventedaccordinglywith
any4”ventapprovedforusewithCategoryIII/IVorSpecialBHtypegasvent.
• The manufacturer recommends the “T-Vent” line manufactured by TAKAGI(RefertoTakagi’s
“T-Vent”brochurefordetails).However,thefollowingarealsoULlistedmanufacturers:ProTech
SystemsInc.(FasNSeal),Flex-LInc.,Z-FlexInc.(Z-VentIII),Metal-FabInc.,andHeat-FabInc.(Saf-T
Vent).
• Follow the vent pipe manufacturer’s instructions when installing the vent pipe.
• Do not common vent this appliance with any other vented appliance (Do not terminate vent
into a chimney. If the vent must go through the chimney, the vent must run all the way through
thechimneywithCategoryIII/IVapprovedorSpecialBHventpipe).
• The maximum length of exhaust vent piping must not exceed 100 ft. (30.5 m) (deducting 5 ft. (1.5
m) for each elbow used in the venting system). Do not use more than 5 elbows.
• When the horizontal vent run exceeds 5 ft. (1.5 m), support the vent run at 3 ft. (0.9 m) intervals
with overhead hangars.
Installaon
Installaon Manual
3”PVCsocket
Exhaust vent collar
oftheDirectVent
Indoor models
(Female)
3”PVCStraightpipe
3”PVCsocket
Intake vent collar
(Female)
3”PVC
Straight pipe
1. Connectthe3"PVCsocketdirectly
on the exhaust/Intake vent collar
of the water heater.
2. Connecta3”PVCstraightpipeto
thePVCsocket.
1. Connecta3"x4"PVCreducer
directly on the Exhaust/Intake
vent collar of the water heater.
2. Connecta4”PVCstraightpipeto
the reducer.
4”PVCStraightpipe
3"x4"PVCreducer
Exhaust vent collar
oftheDirectVent
Indoor models
(Female)
Intake vent collar
(Female)
4”PVC
Straight pipe
3"x4"PVCreducer