Hey everyone. My home was built in Michigan about 6 years ago and the basement has plumbing roughed in for a bathroom but I need some help with identifying what pipes are what. See the attached pictures. I have a picture of the pipes before the floor was poured and a picture after. Hopefully both are helpful. All pipes run to the main stack which is not seen in the pictures. I have labeled all the pipes the same in each photo for proper reference. The only one I believe I know is #4 as it is the only 3 inch pipe so I believe it is the toilet. Any help is very much appreciated!!

Hey everyone. I'm currently looking to replace the faucet in a kitchen sink and have run into some concerns as I prepare to do the job. The primary one that made me come here is that the supply lines from the old faucet don't connect to the water supply with a nut. They instead attach to valve with a round textured attachment where the nut would normally be but there is no nut. It is the size of the nut but round and has a texture around the entire edge. I have never seen a supply line connection without a nut and have no idea what would be the best tool to loosen this connection. I also observe some patina/corrosion on the connections and really don't want to cause a problem. Should I use penetrating oil before attempting to disconnecting the lines? Anyone ever see this before? What is the best way to approach a connection like this? A nut would be obvious but I could not find anything online anywhere showing a supply line with this type of connection... Any help or guidance would be greatly appreciated. I'm also hesitant to try and shut the water at the connections because the valves are stuck in place, so I am going to be shutting off the main when I finally do the replacement. The valves haven't been shut off since this faucet was installed decades ago. Just a few concerns...ugh. Found this picture in another thread. Supply line connections look like this: