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 The Raypak 105A pressure switch tube is designed for compatible heater applications where the supported pressure sensing connection path needs replacement 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 This version is especially useful when the installation is built around the trombone style layout and needs the added high limit and flow switch configuration