I have a natural gas BBQ and I can't tell you how many times I've left
it on overnight or even for a couple of days. I think old age is
setting in.

I was thinking about adding some sort of timer valve on my gas supply
line but my local HVAC contractor tells me that such a thing does not
exist.

I was wondering if anyone here knows of such a device or can think of a
solution to this problem.

HK