piping issues

Hello vast peoples of the plumbing world, Im sure to some of you this will seem remedial, but I find myself at extent of my knowledge on this one, and hope some of you can shed some light for me. This is essentially an irrigation system that needs to have pressure/flow controlled, 72-74 degree...

Replacing an outside leaky faucet. Problem is the piping coming off the house is ~7/8inch (I tried both half inch and 1 inch just to try). They do not sell outside faucet in a 7/8inch so I started looking for an adapter but really having no luck on that front. Could someone link an adapter or...

I hired a plumber to install a pressure tank in our house. He did the piping (I am assuming to save on the work) in such a way that an elbow is touching the floor (which is typically wet). Please see the picture. I am concerned about corrosion and brought the issue to his attention. He mentioned...