Garage/outdoor faucet leakage help

[SewbDude]

So I determined that my anti-back flow valve requires replacement. However, in trouble troublr, I removed the faucet handle and damage a locking nut. So, I need to replace the faucet. The faucet is caterized to a L pipe, made of copper. The copper pipe is then attached to a plastic pipe. What's the best way to detach the copper from the plastic? Is there something else I should be doing to fix my issues?

 

[phishfood]

That looks to be a Viega PEXPress fitting. High quality fittings, but the tools to make them up is very expensive. Probably cheaper to use regular PEX fittings and crimp rings.

 

[coolhandlg]

That black plastic pipe is viega pex pipe if you do not want to call a plumber use shark bite fittings to install a new frost free hose valve arrow makes some with out the vacuum breaker