Balboa Water Group 4kW flo-thru 120/240 volt heater assembly part# 53349. Stainless steel heater manifold measures 2" x 15" long, includes a heater element rated at 1kW/120v & 4kW/240v and comes with 1.25psi pressure switch tap and sensor. Also included are (2) 2" split nuts, (2) tailpieces & a pair of o-ring gaskets. Balboa heater assembly comes complete with a 1 year warranty. (removal of element voids warranty) Note: To make sure this is the correct heater for your application, please check the Balboa label on your existing heater. If you are unsure where to find the part number please contact us.