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 ESG SERIES • GAS INSTALLATION MANUAL • 18.

The minimum size requirement for gas piping or a 
flexible connector is 3/4 - inch (19mm). For long runs 
of gas piping, the pipe diameter must conform to the 
tables in the National Fuel Gas Code, ANSI/NFPA 
Z223.1.

A listed gas shut-off valve must be installed 
upstream of the appliance to shut off the gas 
supply during servicing. The shut-off valve should 
be accessible with the appliance in the normal 
installation position.

If the oven or the oven stand is supplied with 
casters, gas connection must be made with a flexible 
connector that complies with the Standard for 
Connectors for Movable Gas Appliances, ANSI 
Z21.69; or in Canada, Connectors for Movable Gas 
Appliances, CAN/CGA-6.16-M87. When using a 
flexible connector, a quick disconnect device must 
be used to comply with the Standard for Quick-
Disconnect Devices for Gas Fuels, ANSI Z21.41; or in 
Canada, Quick Disconnect Devices for Use with Gas 
Fuels, CAN1-6.9.

When a quick disconnect device and flexible 
connector are used, a restraining device must be 
installed to limit the movement of the appliance and 
prevent damage to the connector or quick disconnect. 
An example of a restraining device would consist 
of a 2000 pound test, stainless steel cable, attached 
to a structural member of the kitchen wall behind 
the oven. The means of attachment should consist 
of a quick connect snap so that the oven can be 
disconnected when the appliance must be moved 
away from the wall.

The other end of the cable should be permanently 
attached to the rear frame of the oven. The cable 
should be of sufficient length so that no strain is ever 
placed on the flexible gas connector in the event of 
accidental movement of the oven without properly 
disconnecting the gas connector. The flexible 
connector should be routed to form a downward 
“U” loop between the building gas supply and the 
permanent attachment at the rear of the oven.

The routing of the flexible connector must not be 
made under the oven. Oven temperatures achieved 
during operation are too hot for safe operation. Gas 
piping should be installed from the point of gas 
connection at the bottom, front of the oven to the 
back of the oven where the flexible connector may be 
safely used. See the illustration for the recommended 
placement.