M&G DuraVent DuraStack® - Manual (Page 35)

35
Figure 66
Figure 67
4. The drain coupling must be connected to a
grease trap or approved container (supplied
by others).
noZZLE SECtIon
1. The nozzle section is used when the
duct is required to be equipped with a fire
suppression system or washdown is desired.
2. The nozzle section allows a spray head or
nipple to be attached to the duct through
a 1” (25) NPT coupling attached to the inner
flue and when the chimney section is in
a vertical orientation, the nozzle may be
located at the most convenient place. See
Figure 68.
3. Local authorities should always be
consulted regarding the need for fire
protection or washdown systems be installed
so that the coupling is at or above the
horizontal centerline of the chimney.
SQuarE to rounD aDaptor
1. When the hood is equipped with a square
or rectangular collar, a square to round
adaptor is needed to connect the round DIS
chimney to the hood (See Figure 69).
2. The outside dimensions of the square end
are slightly smaller than the hood collar. It
will fit inside the collar and be connected by
welding the two parts.
Figure 69
Figure 68
grEaSE tEE 90° (gt90p) / tEE 90 Dam
(t90D) (DIS onLy)
The Grease Tee 90 and the standard Tee
90 with a dam are used to provide access
for clean-out to comply with NFPA 96
requirements. They are equipped with a 1-1⁄2”
(38) high grease dam at the access port.
The access port must be closed with a tee cap
45° Tee
Tee Cap
Length
45° Elbow
Grease Dam
Drain
Grease Dam
Drain
Plain View
Horizontal
Drain
Length
Clean-Out Cap
Standard 90° Tee
Up To Fan
Hood (by others)
Drop To Hood
Nozzle
Nozzle
Not UL Listed