Just deciding on some aspects of my plumbing and will be using the manifold for my H&C system. Question I have is why have people chosen the manifold with isolation valves over the non isolation valve ones which are quite a bit cheaper? Is it just to be able to isolate individual pipes or is there something more to it? If I chose the non valve ones I could still put one isolation valve at the inlet which I know would isolate the entire manifold but that in itself would not be a problem. TIA