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│Installation and Operation Instructions
Trinity
Vent/Air-inlet Pipe Material
Table 4-4 Acceptable Vent and Air-Inlet Pipe Material
1
Items
Materials
PVC - DWV
PVC Schedule 40
Vent Piping
CPVC Schedule 40
and Fittings
Stainless Steel (SS)
Polypropylene (PP)
PVC
Pipe Cement
CPVC
Primers
PVC / CPVC
Notes:
1
Refer to Table 4-5 for Allowable Vent and Air-Inlet Pipe Sizes and Lengths.
2
PVC venting (exhaust and air-inlet) is not permitted within the Closet/alcove of a Closet/alcove installation.
3
The Air-inlet does not require high temperature pipe material; ABS and PVC Foam Core piping is acceptable. Check
applicable local codes for acceptable materials.
The use of cellular core PVC (ASTM F891), cellular core CPVC, or Radel®
(polyphenolsulfone) in the exhaust venting system is prohibited. Failure to follow these
instructions may result in property damage, personal injury or death.
Covering non-metallic vent pipe and fittings with thermal insulation is prohibited. Failure
to follow these instructions may result in property damage, personal injury or death.
Vent/Air-inlet Pipe Length Determination
Use Table 4-5 to determine the maximum pipe length that can be used. The table calculates 90º elbows, and 45º
elbows at 5 equivalent feet each.
Example: When using 3" pipe, a Tft60-285 can be installed with 150 equivalent feet of air-inlet piping and 150
equivalent feet of exhaust-vent piping. See Table 4-5 for more details.
Models Tft60-110 require a minimum equivalent exhaust vent length of 15'. When
operating on Propane, models Tft60-110 require a minimum air-inlet length of 6' and 11'
for 2" and 3" venting respectfully.
Table 4-5 Allowable Vent and Air-inlet Pipe Size and Lengths
Pipe
Model No.
Gas
Size
NG
Tft60-110
2"
1
Tft60-85
Tft110
2
3"
Tft60-285
NG/LP
4"
Tft340-399
Notes:
1
See WARNING below.
2
Maximum 3 in. vent lengths specified are not applicable to models Tft155, Tft175, Tft200 and Tft250; consult earlier
instruction manuals for maximum vent lengths for earlier models.
PVC Exhaust Venting – When using 2" PVC venting with models Tft60-110, the first
seven (7) equivalent feet of exhaust venting must be approved 2" CPVC or 3" PVC; see
exceptions in Table 4-4 and Figures 4-3b and 4-3d.
16
Venting System Standards
2, 3
United States
ANSI/ASTM D2265
ANSI/ASTM D1785
ANSI/ASTM F441
UL-1738
-
ANSI/ASTM D2564
ANSI/ASTM F493
ANSI/ASTM F656
Length
(ft)
1
100
95
35
30
LP
25
20
150
145
100
95
Canada
In Canada, all exhaust
vent material must be
ULC S636 approved.
Number of Elbows (90's or 45's) and Equivalent Feet
2
3
4
90
85
80
75
25
20
15
10
15
10
5
140
135
130
125
90
85
80
75
Tft Series
All
Vent
and
materials installed on gas
fired appliances in CAN/US
must meet the specifications
provided in this Table.
Failure to comply could
result in fire, serious injury
or death.
5
6
7
8
70
65
60
5
-
-
-
-
-
-
120
115
110
70
65
60
Air-Inlet
9
55
-
-
105
55
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