secure a washing drain
#1
#2
Use a clamp with tapcons.
https://www.lowes.com/search?searchTerm=tapcons
https://www.lowes.com/search?searchTerm=pvc+clamps
https://www.lowes.com/search?searchTerm=tapcons
https://www.lowes.com/search?searchTerm=pvc+clamps
#4
I'd buy a plastic washer box and mount it to the wall. The pvc will glue into the drain portion and you can plumb the water to go into the box for the bottom as well, with a single hot/cold water shutoff valve for your hoses.