Table 13.  PVC, VENT PIPE, AND FITTINGS

ALL VENT PIPE MATERIALS AND FITTINGS MUST COMPLY WITH THE FOLLOWING:

ITEM

MATERIAL

STANDARDS FOR INSTALLATION IN:

 

 

UNITED STATES

CANADA

Vent pipe and fittings

PVC schedule 40

ANSI/ASTM D1785

CPVC and PVC venting must be ULC-S636 Certified.

 

CPVC schedule 40/80

ANSI/ASTM F441

 

Pipe cement/primer

PVC

ANSI/ASTM D2564

ULC-S636 Certified.

 

CPVC

ANSI/ASTM F493

 

NOTICE: DO NOT USE CELLULAR (FOAM) CORE PIPE

Table 14.  DIRECT VENT ALLOWABLE AIR/VENT LENGTHS

MODEL

AIR INTAKE

AIR INTAKE

AIR INTAKE

VENT

VENT MIN.

VENT MAX.

 

DIAMETER

MIN. LENGTH

MAX. LENGTH

DIAMETER

LENGTH

LENGTH

 

(INCH)

(FT)

(FT)

(INCH)

(FT)

(FT)

XP 1000

6

12

100

6

12

100

XP 1300

6

12

100

8

12

100

XP 1700

8

12

100

8

12

100

XP 2000

8

12

100

8

12

100

XP 2600

8

12

100

8

12

100

XP 3400

10

12

100

10

12

100

When determining equivalent combustion air and vent length, add 5 feet (1.5 m) for each 90° elbow and 3 feet (0.9 m) for each 45° elbow.

EXAMPLE: 20 feet (6 m) of PVC pipe + (4) 90° elbows + (3) 45° elbows = 49 equivalent feet (15 m) of piping.

Table 15.  ROOM AIR ALLOWABLE VENT LENGTHS

MODEL

VENT DIAMETER

VENT MIN. LENGTH

VENT MAX. LENGTH

 

(INCH)

(FT)

(FT)

XP 1000

6

12

100

XP 1300

8

12

100

XP 1700

8

12

100

XP 2000

8

12

100

XP 2600

8

12

100

XP 3400

10

12

100

36

Page 36
Image 36
A.O. Smith 3400, 2600, 1700, 2000 instruction manual Model Vent Diameter Vent MIN. Length Vent MAX. Length Inch

3400, 1700, 2000, 2600 specifications

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