Certain furnace models incorporate 2 induced draft fans. Each induced draft fan and its
corresponding vent/collector box must have its own individual trapped drain line. Dual
condensate drains
must remain separate
through
roof penetration
and each must be
connected to its own individual P trap
as shown in diagram below. Drain lines may be
joined to a common pipe downstream of P traps.
Furnace
cabinet base
¾” PVC Elbow
(by others)
¾” PVC Pipe to reach to
inside of building (by others)
¾” PVC Union
(by others)
EZ Trap cleanout
(provided with trap kit)
¾” PVC
Coupling
EZ Trap (EZT150)
(provided with trap kit)
¾” PVC Pipe to Building
drain system (by others)
Roof Deck
Roof Curb
