We appreciate your question about the size of the gas line/connection for the dryer, JPDRYER.
A 1/2” (1.27 cm) gas supply line is recommended and must be reduced to connect to the 3/8” (1 cm) gas line on your dryer.
You can also check the model's user manual link about the gas requirements on page 21.
Here's the link: https://downloadcenter.samsung.com/content/UM/202210/20221028013020559/DV7000_UM_DC68-03784S-03_EN_MES.pdf
If you have inquiries and need further assistance in the future, you may contact us via the following options:
1. Facebook Messenger: http://m.me/samsungsupport
2. Twitter: https://twitter.com/messages/compose?recipient_id=18768513
3. Samsung Community: https://us.community.samsung.com/t5/Samsung-Community/ct-p/us
When you message us, please provide us with this reference number (1145133167), which will help our team pull up your information.
^Rainly