Salt chlorinator cell
Pentair Posi-Chlor 25 g/h replacement cell 811021
811021
Fits 1 model
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GenuineGenuine Pentair
$1599.00
Budget Pool Care · 31 OctLowest genuine · Budget Pool Care · checked 31 Oct
CompatibleCompatible option
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No compatible seller tracked yetNo compatible seller tracked yet
Genuine: made by Pentair. Compatible: another brand.Genuine is made by Pentair. Compatible is made by another brand. Check the seller's page for the size and models it fits.
Lowest price · $1599.00
Budget Pool Care. 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.
Compare 2 sellers
AUD, before delivery. Each price shows when it was checked.
Opens Budget Pool Care in a new tab. Their page is the source of truth for price, delivery and returns.
How long it lasts
Replace it after about 10,000 hours of running, its design life, Pentair says; sooner if the unit still shows Lack of Salt once the salt level is right and the cell has been cleaned.
After replacing: No reset needed. Switch the unit back on and set the output again.
How to change the 811021 chlorinator cell
Watch the guide or follow the steps.
No clear video for this part yet. The steps cover it.
- 1Switch the Posi-Chlor and the filter pump off at the power point, and close the valves either side of the cell.
- 2Unscrew the cell's screw cap and lift the electrode plates out of the cell housing.
- 3Fit the new cell with the housing O-ring seated and screw the cap back on.
- 4The new cell comes with its own cable, which is wired to the CELL terminals and the water-sensor terminal (white wire) inside the control unit. This is mains equipment: have your pool shop or an electrician connect it.
- 5Open the valves, start the pump and check for leaks, then switch on and set the production level.
Every number this part goes by
- Retail name:
- 811021
Sellers list any of these; they are the same part.
Will it fit your appliance?
Type your model number and we'll check it against the makers' lists.
Fits this Pentair model
Pentair1 model
Cell with screw cap, O-rings, plates and cable; the housing stays in the pipe.
Common questions
- What does the 811021 fit?
- The Pentair Posi-Chlor 25 g/h replacement cell 811021 fits the Pentair Posi-Chlor 25.
- Where can I buy the 811021 in Australia?
- We track 2 Australian sellers for the 811021; the lowest listed price when we last checked was A$1599.00 at Budget Pool Care. Prices are re-checked daily and dated on this page.
- How do I fit the 811021?
- 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. Switch the unit back on and set the output again.
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