This is a copper jumper strap normally used with the ground wires in the spa. These are mounted on the back of the pumps connecting the ground wire. Is part of the connections from the heater to the PC Board.
The 2 Inch Diverter Valve in Grey by Master Spas is a replacement for your home spa’s original diverter valve, the part of your spa that allows you to control jet water flow. This assembly kit comes with all of the pieces you need to install a new diverter valve in your spa.