Salt chlorinator cell
AstralPool VX9 (VX 9T) and E-Series E35 electrode 21917
21917
Fits 2 models
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GenuineGenuine AstralPool
$1349.00
Budget Pool Care · 31 OctLowest genuine · Budget Pool Care · checked 31 Oct
CompatibleCompatible option
$865.00
Pool Shop · 31 OctPool Shop · checked 31 Oct
Check sellerCheck seller details
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 compatibleLowest compatible price · $865.00
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Compare 4 sellers
AUD, before delivery. Each price shows when it was checked.
Compatible options
2 sellers
Opens Pool Shop 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 21917 chlorinator cell
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 (the blue sensor wire goes back on the blue terminal); on the E-Series and eQuilibrium unplug the cell terminal cap; on the Halo unclip the end cap and unplug the colour-coded wires.
- 3Unscrew the cell nut (retaining ring) and draw the old electrode out of the clear housing. If the housing is cracked, crazed or weeping, fit a complete cell instead.
- 4Slide the new electrode in with its O-ring seated, screw the nut back on firmly by hand and reconnect the lead the way it came off.
- 5Open the valves, start the pump and check for leaks, then switch the chlorinator back on and set the output.
Every number this part goes by
- Retail name:
- 20917
- Retail name:
- 21917
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 these 2 AstralPool models
AstralPool2 models
E-Series E35. Electrode only: it slides into your existing clear housing and is held by the cell nut. Australian AstralPool parts sellers list the VX9 cell for the E35.
VX 9T. Electrode only: it slides into your existing clear housing and is held by the cell nut. The S model (no time clock) takes the same 9-plate cell, AstralPool's VX parts list shows.
Common questions
- What does the 21917 fit?
- The AstralPool VX9 (VX 9T) and E-Series E35 electrode 21917 fits the AstralPool E-Series E35 and VX 9T.
- Where can I buy the 21917 in Australia?
- We track 4 Australian sellers for the 21917; the lowest listed price when we last checked was A$865.00 at Pool Shop. Prices are re-checked daily and dated on this page.
- How do I fit the 21917?
- 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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