has anyone used a rifeng manifold with their radiant heat? i bought a 6 port manifold and seems that i overlooked that they say it only works with pex-al-pex. this could be a problem where i have already pulled in just o2 barrier pex in my floor. i dont know the differance between the two and if there would be a connection issue. i have seen that the pex-al-pex will not work with sharkbite fittings where pex will.