Zodiac - Ei2 20 replacement electrode - R0673700

Zodiac – Ei2 20 replacement electrode – R0673700

The Zodiac R0673700 is the genuine replacement electrode for the Ei² 20 salt chlorinator, part of Zodiac’s Ei2 and Ei2 Expert series of electrolytic chlorination systems. The electrode is the core electrolytic cell component responsible for converting dissolved salt (sodium chloride) in pool water into free chlorine through electrolysis. As the electrode degrades naturally over time through regular use, replacing it with the correct OEM part restores the chlorinator to its original disinfection performance and extends the operational life of the overall unit.

This electrode is designed exclusively for the Ei² 20 model, which is rated for a chlorine output of 20 grams per hour. Replacing a worn electrode with this genuine Zodiac part ensures that the electrochemical conversion efficiency is maintained, helping to keep pool water hygienically safe without over-reliance on additional chemical treatments. The electrode slots into the chlorinator cell housing and is secured using the dedicated cell fixing nut and cell connector cover as detailed in the Ei2 exploded parts diagram.

Technical characteristics and compatibility

This electrode is referenced under part number R0673700 in the official Zodiac Ei2 and Ei2 Expert spare parts list, where it is specifically identified as the Ei² 20 electrode, corresponding to the 20 g/h chlorine output variant. The Ei2 series includes multiple electrode variants — R0673600 for the Ei² 12 model and R0673700 for the Ei² 20 model — so it is important to confirm your chlorinator model before ordering. Installing the wrong electrode variant may result in incorrect fit or suboptimal chlorination performance.

As a genuine Zodiac OEM spare part, the R0673700 electrode is manufactured to the exact material specification and dimensional tolerances of the original component. The electrode plates are constructed to withstand continuous exposure to saline water and the electrical current required for electrolysis. Installation follows the standard Ei2 cell disassembly procedure: isolate the unit from power, disconnect the cell, remove the fixing nut, extract the old electrode, insert the new R0673700 electrode, and reassemble using the cell connector cover and fixing nut.

Suitability and application

The Zodiac R0673700 replacement electrode is intended for pool owners and service technicians maintaining a Zodiac Ei² 20 salt chlorinator. It is suitable for residential swimming pools where the Ei² 20 chlorinator was originally installed as the primary water disinfection system. This part is not compatible with other Ei2 variants such as the Ei² 12 or Ei² 25, nor with other Zodiac chlorinator series outside the Ei2 range. If you are unsure of your model, refer to the label on your existing chlorinator unit or cross-reference the part number from your Zodiac installation manual before purchasing.