Hayward CSPAXI11 11kw Spa Heater Hayward electric spa heaters contain all of the sophisticated features and capabilities of heaters twice their size. The electric heaters fit into compact spaces - even under spa skirts or steps. Like all Hayward heaters, they are easy to install and service. Applications Hot tubs Spas (above 70 G.P.M. an external by pass is recommended) Features 304 stainless steel tank 304 stainless steel threaded head, safety sensor electric heating element Service-ease design gives simple access to internal controls Heater on indicator light UPS Shippable Technical Specifications 11 Kilowatt 240 Volts 1 1/2 Pipe size Shipping Weight: 14 Lbs Overall Dimensions 1 year limited manufacturer warranty. We are a Authorized Hayward Dealer!