Gas regulators bleed off height

[Samjohn]

Good afternoon,

I've been looking for an Ontario gas code for bleed off venting for a natural gas regulator. I've heard 12" off grade and also 18" off grade.
Could someone direct me to a code to give me solid information?

Thanks

[samihabib]

There is no minimum requirement ..as long as it's not close to any air intake or opening to a house ..and enough to clear from water and snow ..so pointing down and high enough for snow to not block it 

[Samjohn]

Thanks!