Review on 18-Inch Corrugated Stainless Steel Flexible Water Line with 1-Inch Female Threaded NPT Connector 💧 - Ideal for Water Softeners Filters System Supply - Heavy Duty Bendable Flex Pipe Connections by David Edwards

I bought four of these to install an entire home water filtration system and booster pump in a small space. I wanted the ability to easily adjust items during this setup and easily remove/replace items as needed. They cost a little more than I'd like, but they're worth it for getting the access I need. You need to be fairly straight at the plug or it will leak, although it's pretty obvious. They are not very easy to manipulate as they are 1 inch lines. It's easy enough for me to put them in and be successful. I would definitely use them again if needed.