I was surprised when I opened the box — the whole thing is much smaller than you’d think. The circumference around where the black switches are (one on each side) are much much smaller than on the splitter I am replacing. But then again, that one broke so maybe smaller is good? I imagine it does something to the pressure though, not sure in which direction.Didn’t leak when I turned it on the first time, which is a win. Comes closed, so you need to turn the knobs to "on”. It’s not super easy but See full review