To get email notification when someone adds to a thread you're following, click on the star in the thread's header and it will turn yellow; click again to turn it off. To edit your profile, click on the gear.
The Wall has a powerful search engine that will go all the way back to 2002. Use "quotation marks" around multiple-word searches. RIGHT-CLICK on the results and choose Open Link In New Window so you'll be able to get back to your results. Happy searching!
In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
Drilling and tapping a main
I need to drill and tap a 1 ½” main to put in a vent; there are no plugs, no T’s, nothing, and old rusty pipe.
My question is, how small a hole can I drill and tap and still get decent venting? I ask because I’ve read that a Gorton D, at 1/8” (or ¼” straight), vents as much as a Gorton 1, with a ½” connection. Is that accurate? Is it all the orifice size? If so, why have such large connections?
If I can tap for ¼” I can get 18 threads per inch, or 27 threads per inch at 1/8”; given that the 1 ½” main is somewhere around 3/16 to .20 inches thick, but is curved, I could get at least 3 threads cut for a ¼” tapping, and maybe 5 for a 1/8” tapping. I would do the latter if I trusted that I would get adequate venting.
0 · ·