The Zodiac Ei 25 takes the Zodiac Ei 25 (Mid) electrode W197621 as its cell; Australian sellers list it from A$1150.00 as of 31 October 2026. This fit is not yet confirmed against the manufacturer's list.
Your salt chlorinator
Zodiac Ei 25
Salt chlorinator
Not confirmed by Zodiac — check your old partNot yet confirmed by Zodiac's own list — check the code on your old part
Not yours? Change
Takes the W197621 cell
Ei 25 (Mid) electrode W197621 · check the code on your old part before ordering.
Electrode only: it fits your existing cell housing under the retaining ring.
Your salt chlorinator
Salt chlorinator
Not confirmed by Zodiac — check your old partNot yet confirmed by Zodiac's own list — check the code on your old part
Takes the W197621
Cell · check the code on your old part.
Electrode only: it fits your existing cell housing under the retaining ring.
Other Zodiac salt chlorinators and their cells
The W197621 fits the Ei 25 only. These Zodiac models take a different cell:
GenuineGenuine Zodiac
$1150.00
Pool & Spa Warehouse · 31 OctLowest genuine · Pool & Spa Warehouse · checked 31 Oct
CompatibleCompatible option
See seller
No compatible seller tracked yetNo compatible seller tracked yet
Genuine: made by Zodiac. Compatible: another brand.Genuine is made by Zodiac. Compatible is made by another brand. Check the seller's page for the size and models it fits.
Lowest price · $1150.00
Pool & Spa Warehouse. Every seller we track is listed below. Some links earn us a commission. Some seller links earn us a commission, at no extra cost to you.
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AUD, before delivery. Each price shows when it was checked.
Opens Pool & Spa Warehouse in a new tab. Their page is the source of truth for price, delivery and returns.
How long it lasts
Replace it when the controller shows Check Cell and cleaning the electrode in mild acid does not clear it, Zodiac says; fit the electrode made for your model.
After replacing: No reset needed. Once water flows through the new cell the controller reads it again; set the output again if you changed it while the cell was out.
How to change the cell in your Zodiac Ei 25
Watch the guide or follow the steps.
- 1Switch off the filter pump and the chlorinator, and close any valves either side of the cell.
- 2Unplug the cell terminal cap (the cell head and plug).
- 3Unscrew the retaining ring and lift the old electrode out of the cell housing.
- 4Fit the new electrode with its O-ring in place and screw the retaining ring back on by hand. Use the electrode made for your model.
- 5Refit the cell head and plug, reset the valves and switches, and turn the pump and chlorinator back on.
Every number this part goes by
- Retail name:
- W197621
Sellers list any of these; they are the same part.
About your Zodiac Ei 25
Zodiac salt chlorinator — Ei salt chlorinator. Its cell is the Ei 25 (Mid) electrode W197621, part W197621.
Where the model number is: The model and output are on the label on the power supply or control box near the pump. Switch the chlorinator and pump off at the power point before you touch the cell.
Fits this Zodiac model
Zodiac1 model
Electrode only: it fits your existing cell housing under the retaining ring.
Common questions
- Which cell fits the Zodiac Ei 25?
- The Zodiac Ei 25 takes the Zodiac Ei 25 (Mid) electrode W197621. Electrode only: it fits your existing cell housing under the retaining ring.
- Where can I buy the W197621 in Australia?
- We track 2 Australian sellers for the W197621; the lowest listed price when we last checked was A$1150.00 at Pool & Spa Warehouse. Prices are re-checked daily and dated on this page.
- How do I fit the W197621 in a Zodiac Ei 25?
- 5 steps, listed on this page with the replacement video where the maker has one.
- What happens if I don't change it?
- A worn cell makes too little chlorine, so the water turns green or cloudy, and turning the output up only wears it faster.
- Is there anything to reset afterwards?
- No reset needed. Once water flows through the new cell the controller reads it again; set the output again if you changed it while the cell was out.
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