The Filtrite CX30 takes the AstralPool VX9 (VX 9T) and E-Series E35 complete cell 21907 as its cell; Australian sellers list it from A$1089.00 as of 31 October 2026. This fit is not yet confirmed against the manufacturer's list.
Your salt chlorinator
Filtrite CX30
Salt chlorinator
Not confirmed by Filtrite — check your old partNot yet confirmed by Filtrite's own list — check the code on your old part
Not yours? Change
Takes the 21907 cell
VX9 (VX 9T) and E-Series E35 complete cell 21907 · check the code on your old part before ordering.
Clark Rubber sells the AstralPool VX9 complete cell (electrode with housing) for the CX30.
Your salt chlorinator
Salt chlorinator
Not confirmed by Filtrite — check your old partNot yet confirmed by Filtrite's own list — check the code on your old part
Takes the 21907
Cell · check the code on your old part.
Clark Rubber sells the AstralPool VX9 complete cell (electrode with housing) for the CX30.
GenuineGenuine AstralPool
$1089.00
Clark Rubber · 31 OctLowest genuine · Clark Rubber · checked 31 Oct
CompatibleCompatible option
See seller
No compatible seller tracked yetNo compatible seller tracked yet
Genuine: made by AstralPool. Compatible: another brand.Genuine is made by AstralPool. Compatible is made by another brand. Check the seller's page for the size and models it fits.
Lowest price · $1089.00
Clark Rubber. 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 4 sellers
AUD, before delivery. Each price shows when it was checked.
Genuine AstralPool
4 sellers
Opens Clark Rubber 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 keeps showing low salt, no flow or low output after the salt level has been checked and the cell cleaned, AstralPool says; check the cell for calcium every fortnight.
After replacing: No reset needed. After fitting, run the pump, switch the chlorinator on and set the output again; the low-salt or no-flow warning should clear once water is flowing through the new cell.
How to change the cell in your Filtrite CX30
Watch the guide or follow the steps.
- 1Turn the chlorinator off at the power point, turn the filter pump off and close the valves either side of the cell if you have them.
- 2Disconnect the cell lead: on the VX and Viron undo the wing nuts (note the blue wire is on the blue terminal); on the E-Series and eQuilibrium unplug the cell terminal cap; on the Halo unclip the end cap.
- 3Undo the two barrel unions and lift the old cell out of the pipework.
- 4Fit the new cell level, with the barrel unions underneath, the O-rings seated and the water entering at the end nearest the terminals (follow the flow label). Tighten the unions.
- 5Reconnect the lead, open the valves, start the pump and check for leaks, then switch the chlorinator on and set the output.
Every number this part goes by
- Retail name:
- 20907
- Retail name:
- 21907
Sellers list any of these; they are the same part.
About your Filtrite CX30
Filtrite salt chlorinator — Filtrite CX salt chlorinator (Clark Rubber). Its cell is the VX9 (VX 9T) and E-Series E35 complete cell 21907, part 21907.
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 these 3 models
Filtrite1 model
AstralPool2 models
Filtrite CX30. Clark Rubber sells the AstralPool VX9 complete cell (electrode with housing) for the CX30.
The other 2 models. Complete cell (electrode and clear housing): buy this if your housing is cracked, crazed or leaking. If the housing is sound, the electrode on its own is enough.
Common questions
- Which cell fits the Filtrite CX30?
- The Filtrite CX30 takes the AstralPool VX9 (VX 9T) and E-Series E35 complete cell 21907. Clark Rubber sells the AstralPool VX9 complete cell (electrode with housing) for the CX30.
- Where can I buy the 21907 in Australia?
- We track 4 Australian sellers for the 21907; the lowest listed price when we last checked was A$1089.00 at Clark Rubber. Prices are re-checked daily and dated on this page.
- How do I fit the 21907 in a Filtrite CX30?
- 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. After fitting, run the pump, switch the chlorinator on and set the output again; the low-salt or no-flow warning should clear once water is flowing through the new cell.
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