One of my shut off valve need to be replaced. It’s a metal valve in a copper pipe.
A plumber proposed a solution, by adding plastic fittings on both ends of the valve.
The plumber said the finished project would be like this (from his previous job at another customer’s). (see the fittings in blue circles).

I don’t know a lot about plumbing code, so I’m seeking advice here. Is it a common practice to add plastic fittings like this?
I’m in Ontario, Canada. Thank you very much 😊


Something else I just noticed - that plastic doesn’t have any clamps holding it to the wood right there, so every turn of that valve (you know, a shut off valve that gets used once every five years) is going to really stress that plastic.
I’d find a different plumber.
That is a good point. The torque on the valve is going to be causing stress.