I just bought a house built in 1984 it has PEX plumbing. I need to remove a toilet to install a new floor and I noticed the water supply line to the toilet connects to a water shut off valve that I’ve never seen before. It looks like a PVC bonnet or nut cap thing With a half crescent ring that you turn left or right to turn the water on or off.
Are these reliable or should I replace with a quarter turn ball valve. I really don’t want to do anything unnecessary but a PVC shut off valve gives me anxiety as an inexperienced DIY homeowner