Cal Spas Topside Control 407U. Note this is for a one pump system. Note to customer This panel looks just like the 407t please check your button configuration. The 407t is for a 2 and 3 pump system. Track Page Views With. Auctiva’s FREE Counter. This item is in the category “Home & Garden\Yard, Garden & Outdoor Living\Pools & Spas\Spas & Hot Tubs”. The seller is “a-1spacontrol” and is located in this country: US. This item can be shipped to United States.