Installation Manual
Installation
11│Page
‐Exhaustvent(PVC&ABSvent)‐
TheT‐H2‐DVcanbeconnectedwithPVCorABSventing(temperatureratedupto149°F).However,
TAKAGIrecommendsPVC(orABS)ventingcertifiedtoULCS636s t andards.
Item Material UnitedStates Canada
Exhaustpipe&
Fittings
Schedule40PVC ANSI/ASTMD1785
ULCS636Certified
MaterialsOnly
PVC‐DWV ANSI/ASTMD2665
Schedule40CPVC ANSI/ASTMF441
Schedule40ABS‐DWV ANSI/ASTMD2661
PipeCement/Primer
PVC ANSI/ASTMD2564
CPVC ANSI/ASTMF493
ABS ANSI/ASTMD2235
NOTE:DoNOTUseCellularFoamCorePipe
• The maximum length of exhaust vent piping must not exceed 50 ft. (deducting 5 ft. for each
elbowusedintheventingsystem).Donotusemorethan5elbows.
• Whenthehorizontalventrunexceeds5ft.,supporttheventrunat3ft.intervals withoverhead
hangars.
Diameter Max.No.ofElbow Max.Vertical&Horizontal(Total)VentLength
4” 5 50ft.
*Foreachelbowadded,deduct5ft.frommax.Ventlength.
No.ofElbows Max.VerticalorHorizontalLength
0 50ft.
1 45ft.
2 40ft.
5 25ft.
FordetailsontheventconnectiontotheT‐H2‐DV,refertoP.13.
‐Exhaustvent(Stainlesssteelvent)‐
This is a Category IV appliance and must be vented accordingly . The vent system must be sealed air
tight.Allseamsandjointswithoutgasketsmustbesealedwithhighheatresistant siliconesealantorUL
listedaluminumadhesivetapehaving aminimumtemperatureratingof160°F.Forbestresults,a
vent
systemshouldbeasshortandstraightaspossible.
• This T‐H2‐DV is a Category IV appliance and must be vented accordingly with any 4” vent
approvedforusewithCategoryIII/IVorSpecialBHtypegasvent.
• TAKAGI recommends the “T‐Vent” line
manufactured by TAKAGI (Refer to Takagi’s “T‐Vent”
brochurefordetails).However,thefollowingarealsoULlistedma nufacturers:ProTechSystems
Inc.(FasNSeal),Flex‐LInc.,Z‐FlexInc.(Z‐VentIII),Metal‐FabInc.,andHeat‐FabInc.(Saf‐TVent).
• Followtheventpipemanufacturer’sinstructionswheninstalling
theventpipe.