Rola-Chem 554500 Digital Controller with (2) 38 GPD Peristaltic Pumps Pool professionals have told us our Ready-to-Mount systems take the hassle out of installing and maintaining water chemistry control. Each of the Ready-to-Mount configurations include: fully integrated, board mounted pump(s), controller and monitoring components that are literally plug and play. And the best part is—each system can be ordered with one part number and one PO. All you need is a supply tank and electricity. You and your customer are on their way to the Perfect Pool faster than ever.