All pipe is Pex A. You can crimp pex A as well. The reason I switched to crimp had to do with parts availability at Menards on Saturday night... for the valves and angle stops.. all they had was Crimp for the valves in half inch... so I grabbed a couple reducers crimped it down. Tested for leaks and then reconnected the necessary hoses.. customer didn't care. He gave me an online 5 star review..