Hydro Quip Laing Trombone Style Heater [4.0kW] [240v] w HL & FlowSwitch (26 3473 1H 5T F) cgairsystems this Waterway multiport valve is this Waterway multiport valve is a practical option when a side mount design and 2 inch slip plumbing format are required This type of component is especially useful when the spa is designed around both therapy pump outputs and a dedicated circulation feature A specialty heater like this is useful because it matches systems that rely on a specific internal shape and protective feature set rather than a more conventional straight body heater Matching those details helps preserve intended compatibility and more dependable service performance