I plumbed a couple of dozen new homes with it. I ran 3/4" as trunk lines, then teed off with 1/2" to all fixtures. Never had an issue with pressure or volume. In reality, all modern fixtures are made to limit flow, so there really is no need provide excess volume to the fixture, since it won't be used anyway. If you haven't bought any tools or fittings yet, take a look at the stainless steel band clamps and pliers. Far superior to the compression band style and it needs one inexpensive tool to do all sizes of pipe.