[mentalpiracy]

>>> single-use plastic shutoff valves with non-threaded supply hoses

Yes, this is the standard now for an number of reasons:

* because it is far easier to cut damaged sections of PVC on site and assemble replacements than it is to cut metal piping

* PVC is wildly less expensive than the equivalent length of metal piping, because it is used in a huge number of applications

* PVC is non-reactive and does not corrode like metal

and lastly, threaded pipe connections significantly decrease the throughput of a pipeline, reducing available water pressure at the endpoint. It is basic best practice to limit where threaded connections are used so that you can maintain uniform pressure across the whole unit.