SECTION IV: INSTALLATION (cont.)
VENT & COMBUSTION AIR INTAKE (cont.)
NOTICE
Installations in Canada must conform to the requirements of CSA B149 code. Plastic
vent systems must be assembled with pipe, fittings, cements, and primers listed to ULC
S636. Components of this listed system shall not be interchanged with other vent
systems or unlisted pipe/fittings. In Canada, the primer and cement must be of the
same manufacturer as the vent system; do not mix primers and cements from one
manufacturer with a vent system from a different manufacturer. The supplied plastic
pipe/fittings are certified as part of the water heater.
Minimum and Maximum System Lengths
The water heater should be located such that plastic vent pipe lengths and the number of
connection fittings are minimized. Minimum and maximum equivalent pipe lengths for
the vent and combustion air intake systems are given in Tables 4 and 5. Either 3 in. or 4
in. plastic piping may be used. The water heater is provided with fittings that readily
adapt to 3 in. plastic pipe. DO NOT use less than 3 in. diameter plastic pipe and DO NOT
use unequal sizes except as shown to increase from 3 in. to 4 in. diameter at the point of
connection to the water heater.
NOTE: The equivalent straight pipe length of a 90°, 1/4 inch standard bend elbow
and a 45°, 1/8 inch standard bend elbow is 5 feet and 2.5 feet, respectively. The
concentric vent termination is equivalent to 10 feet of straight pipe. DO NOT use
short bend elbows.
NOTE: Elbows used as termination fittings must be included when determining
the total number of elbows.
Table 4:
Minimum and Maximum Vent and Air Intake Pipe Lengths (Two-Pipe Terminations
)
Table 5:
Minimum and Maximum Vent and Air Intake Pipe Lengths (Concentric Termination)
Page 11
Model(s)
Pipe Ø (in)
Minimum Equivalent Pipe
Length (per pipe run)
Maximum Equivalent Pipe
Length (per pipe run)
Air Intake
Ft (m)
Vent
Ft (m)
Air Intake
Ft (m)
Vent
Ft (m)
EZ 75-76PDV,
EZ 100-76PDV
3
5 (1.52)
12 (3.66)
55 (16.76)
55 (16.76)
4
5 (1.52)
12 (3.66)
85 (25.91)
85 (25.91)
Model(s)
Pipe Ø (in)
Minimum Equivalent Pipe
Length (per pipe run)
Maximum Equivalent Pipe
Length (per pipe run)
Air Intake
Ft (m)
Vent
Ft (m)
Air Intake
Ft (m)
Vent
Ft (m)
EZ 75-76PDV,
EZ 100-76PDV
3
5 (1.52)
12 (3.66)
45 (13.72)
45 (13.72)
4
5 (1.52)
12 (3.66)
75 (22.86)
75 (22.86)
