Both valves are open. The bottom one is plugged so nothing will come out. Unless there is a pipe behind it that comes out of the wall, that back flow preventer is doing nothing.
I would expect the supply to be at the side and the output at the bottom. Where is the supply coming from?
Is the black pipe going to the sprinkler system? If so, that should be on the output (with a drain valve teed in.)
The two small test ports can be closed with a screwdriver. Closed when the slot is at 90* to the output port.
There is a tee below the lower valve so there must be a pipe directly behind it we can't see.
There should be another shutoff valve inside in a warm zone feeding this.
I usually open my supply valve first (because it is inside the basement near the meter.) I leave the outside supply valve always open. (It has a small handle and is very difficult to turn. Also guarantees that the pipe will be blown out back to the inside drain when winterizing.) Then I open the output valve at the back flow. A small amount of water spurts out of the top of the back flow until it is pressurized. (That's normal.)
Hi there!
I am doing this for the very 1st time.
I am just hoping you guys can confirm if my experience so far is normal (expected). Or not, due to something being off: maybe I should be using a different drill bit, or drill, maybe I am not pressing hard enough.
So far I have been pressing at medium strength (I guess). I am certainly being careful not to press too much, as the last thing I want is to crack the tile.
It has taken me about 2 minutes' worth of drilling. I was not able to attach the photos here, but if that would make a difference, I could put links to an image host service.
The drill bit: 5/32", High speed steel for general purpose drilling into metal and wood.
What do you guys think?
Should I just continue, or there is something I should change?
I need to bring the vent for this kitchen sink to the right of this window. All my vents are 2”, but I could reduce down this portion to pass through the 2x4 studs or there is a 8” metal purlin directly behind the 4 studs on the right that I may be able to drill through. Should I drill/notch all the studs or try going through the purlin? Any suggestions?
code is IPC.
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06-06-22, 08:20 AM
