Additional Details ------------------------------ Product description: New Kuuma marine 6 gallon water heater. Model number 11811. This is a combination water heater and can run on engine coolant heat exchange, 120 volt AC, or both. This model has the heat exchanger barbs on the front along with all other connections and fittings (see pictures). Replaces Attwood, Whale, and Seaward water heater models F600, F600W, and F700 (dimensions may be slightly different, see below). Specs Capacity: 6 Gallon Material: Aluminum Overall Dimensions: 19.75" D x 13.75" W x 13.625" H Body Dimensions: 16" D x 13.75" W x 13.625" H Heat exchanger barbs: 5/8" O.D. Cold water supply and hot water outlets: 1/2" NPT Mount Arrangement: Front-Rear Electrical Input: 120V - 50Hz/1500W Wiring Configuration: L1 & N Heat Exchanger Position/Material: Front/AL T&P Valve Type: 150psi & 210 degree F, CSACalifornia Residents: WARNING Cancer and Reproductive Harm - P65Warnings.ca.gov.