Forum Discussion
bobsallyh
Jul 10, 2015Explorer II
If this unit had a previous owner it could be a port for an Extended-Stay. Or depending where it is installed in reference to the regulator it could be a low pressure port for a gas grill etc. But I'd bet on an extended-stay.
http://www.amazon.com/Marshall-Gas-Controls-536-00-Extend-A-Stay/dp/B002UC4T6C
http://www.amazon.com/Marshall-Gas-Controls-536-00-Extend-A-Stay/dp/B002UC4T6C
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