Reputations are built on hard work, not shortcuts. Just like PVB Professional series valve boxes. Made-in-America tough, these boxes are loaded with the features you need to get the job done right, without cutting corners - Even standard installations deserve professional performance. From reinforced sidewalls and bottom flanges to skid-resistant lids, the PVB Professional series is manufactured to our own exacting standards, using quality materials and rigorously tested for durability.