Welcome! Here are the website rules, as well as some tips for using this forum.
If you've found help here, check back in to let us know how everything worked out.
It's a great way to thank those who helped you.
I'm planning on putting in a main vent on my neglected unvented main steam line which is <strong>68ft long 2 1/2".</strong>
My father in law was planning on coming down to weld on a<strong> 3/4" tap</strong> 15 in after last riser and I was planning<strong> 2-3 maid o mist main vents menora style</strong> (based on my cu ft calculations)
Sound appropiate. <strong>Do I need a 3/4" tap</strong>? Thought i read some where that 1/2" tap is too small to vent my line in ~3minutes.