State Industries GS6 50 YBRT Series 201 User Manual

14

Align the legs of the draft hood with the slots provided. 

Insert the legs and secure the draft hood to the water 

heater’s top with the four screws provided as shown in 

Figure 9. Do not alter the draft hood in any way. If you are 

replacing an existing water heater, be sure to use the draft 

hood supplied with this water heater.

It is important that you follow the guidelines in these 

instructions for sizing a vent pipe system. If a transition 

to a larger vent size is required, the vent transition 

connection must be made at the draft hood outlet.

1.  Type B, Double wall, U.L. Listed Vent Pipe.
2.  Single wall Vent Pipe.
Maintain the manufacturer’s specified minimum clearance 

from combustible materials when using type B double wall 

vent pipe.
Vent connectors made of type B, double wall vent pipe 

material may pass through walls or partitions constructed 

of combustible material if the minimum listed clearance is 

maintained.
Maintain a six inch minimum clearance from all 

combustible materials when using single wall vent pipe.
IMPORTANT: Single wall vent pipe cannot be used for 

water heaters located in attics and may not pass through 

attic spaces, crawl spaces or any confined or inaccessible 

location. A single wall metal vent connector cannot pass 

through any interior wall.
When installing a vent connector, please note the following 

(See Figures 10-12):
• 

Install the vent connector avoiding unnecessary bends, 

which create resistance to the flow of vent gases.

• 

Install without dips or sags with an upward slope of at 

least 1/4-inch per foot.

• 

Joints must be fastened by sheet metal screws or other 

approved means. It must be supported to maintain 

clearances and prevent separation of joints and 

damage.

• 

The length of the vent connector cannot exceed 75% of 

the vertical vent height.

• 

The vent connector must be accessible for cleaning, 

inspection, and replacement.

• 

Vent connectors cannot pass through any ceiling, floor, 

firewall, or fire partition.

• 

It is recommended (but not mandatory) that a minimum 

12 inches of vertical vent pipe be installed on the draft 

hood prior to any elbow in the vent system.

IMPORTANT: Existing vent systems must be inspected for 

obstructions, corrosion, and proper installation.

IMPORTANT: Before connecting a vent to a chimney, 

make sure the chimney passageway is clear and free of 

obstructions. The chimney must be cleaned if previously 

used for venting solid fuel appliances or fireplaces. Also 

consult local and state codes for proper chimney sizing 

and application or, in the absence of local and state 

codes, the “National Fuel Gas Code”, ANSI Z223.1(NFPA 

54)-current edition.

• 

The connector must be installed above the extreme 

bottom of the chimney to prevent potentially blocking 

the flue gases.

• 

The connector must be firmly attached and sealed to 

prevent it from falling out.

• 

To aid in removing the connector, a thimble or slip joint 

may be used.

• 

The connector must not extend beyond the inner edge 

of the chimney as it may restrict the space between it 

and the opposite wall of the chimney (Figure 10).

Do not terminate the vent connector in a chimney that has 

not been certified for this purpose. Some local codes may 

prohibit the termination of vent connectors in a masonry 

chimney.

Vertical exhaust gas vents must be installed with 

U.L. listed type B vent pipe according to the vent 

manufacturer’s instructions and the terms of its listing. 
It must be connected to the water heater’s draft hood by a 

listed vent connector or by directly originating at the draft 

hood opening.
Vertical gas vents must terminate with a listed cap or 

other roof assembly and be installed according to their 

manufacturer’s instructions.
Gas vents must be supported to prevent damage, joint 

separation, and maintain clearances to combustible 

materials (Figures 11 and 12).
IMPORTANT: This gas vent must be terminated in a 

vertical position to facilitate the removal of the burnt gases.
An unused chimney flue or masonry enclosure may be used 

as a passageway for the installation of a gas vent (Figure 12).
Common (combined) venting is allowable with vertical type 

B vent systems and lined masonry chimneys as long as 

proper draft for the water heater is established under all 

conditions of operation. CAUTION: DO NOT common vent 

this water heater with any power vented appliance.
Figures 10-12 are examples of vent pipe system 

installations and may or may not be typical for your 

specific application. Consult the “National Fuel Gas Code”, 

NFPA 54, ANSI Z223.1-current edition and the guidelines 

set forth by prevailing local codes.