We live in a world where most contractors still build up their manifolds by hand, using PVC, primers, & glues. The rationale is that it's fast & cheap. But is it really? Hydro-Rain time trials show that even a fast contractor spends over 13 Min to build the valve Manifold out of PVC. Hyrdro-rain's hrs 100 Manifold takes less than half that time. During the course of a year,a typical medium-size contractor will waste over 65 hours of time - more than a week & a half of productive labor- going with the "fast & cheap method." it's one of those cases where what looks like a savings, actually ends up costing you.