58083 Product Dimension Series: M7, LE, VALUE, EL Manifold Length: 15" Manifold Diameter: 2" Heating Element Included: Yes Kilowatt Rating: 4.0KW / 1.0KW Voltage Rating: 240V / 120V Stainless Steel: Yes Mounting Studs: Yes Number of Mounting Studs: 2 Wide Application Suitable for most Balboa heater.Replace the following part numbers (but not limited to)Balboa:58282, 55302, 55473, 58002, 58016, 58086, 58089, 58090, 58121, 58123, 58140, 58209, 58306Cal Spa:HEA14100450HydroQuip:26-0807-7S-KS, 25-58002-K, 26-58083-K, Therm Products C2500-0807-TPS Step 1 Disconnect the power supply of the equipment.Use an open end wrench to slowly crack the heater split nuts until the water in the pipe flows out Step 2 Locate the 2 sensors holder on the circuit board.Remove the 2 heater sensors by depressing the clip and gently pulling on the wire to remove each sensor cable Step 3 Use a 3/8” wrench to remove the 2 nuts holding the heater in place Step 4 Use a 3/8” wrench to remove the nuts on the copper straps.Then lift the copper straps Step 5 Use an open end wrench to loosen the heater split nuts and remove the old heater assembly and gaskets Step 6 Replace the new gaskets and install the new heater assembly, tighten the split nuts with an open end wrench. Step 7 Screw on the 2 nuts that holding the heater, insert the 2 heater sensors into the sensor bracket on the circuit board, make sure the copper strip is connected to the heater and tighten the nuts. Step 8 Put the cover on and screw on the 2 screws on the top of the enclosure.Turn on the water valve and pump, restore the power of the equipment, and test