The AstralPool CL400 takes the AstralPool Viron CL400 cartridge element 78083 as its cartridge; Australian sellers list it from A$81.00 as of 28 October 2026. Fitment confirmed against the manufacturer's compatibility list.
Your pool filter
AstralPool CL400
Pool filter
Confirmed against AstralPool's listConfirmed against AstralPool's own compatibility list
Not yours? Change
Takes the 78083 cartridge
Viron CL400 cartridge element 78083 · check the code on your old part before ordering.
This filter takes 4 cartridges.
Your pool filter
Pool filter
Confirmed against AstralPool's listConfirmed against AstralPool's own compatibility list
Takes the 78083
Cartridge · check the code on your old part.
This filter takes 4 cartridges.
Other AstralPool pool filters and their cartridges
The 78083 fits the CL400 only. These AstralPool models take a different cartridge:
GenuineGenuine AstralPool
$256.00
Heater and Spa Parts · 6 NovLowest genuine · Heater and Spa Parts · checked 6 Nov
CompatibleCompatible option
$81.00
Heater and Spa Parts · 28 OctHeater and Spa Parts · checked 28 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 · $81.00
Heater and Spa Parts. Compare with genuine below. Some links earn us a commission. Some seller links earn us a commission, at no extra cost to you.
Compare 4 listings from 3 sellers
AUD, before delivery. Each price shows when it was checked.
Compatible options
3 sellers
Opens Heater and Spa Parts in a new tab. Their page is the source of truth for price, delivery and returns.
How long it lasts
Replace it when a cleaned element still reads 30–40 kPa above the new-filter pressure, or is damaged; AstralPool says to check once a year.
After replacing: No reset light. Note the gauge reading with clean elements; AstralPool says to clean them when the gauge rises 20 kPa.
How to change the cartridge in your AstralPool CL400
Watch the guide or follow the steps.
- 1Stop the pump, close the suction and return valves and open the air bleed valve on the lid.
- 2Unscrew the lock ring and lift off the lid. Never loosen the ring while the pump runs.
- 3Lift out the four cartridges. Soak each one in a mild solution of chlorine and warm water for 15 minutes, then hose it off, or fit new ones.
- 4Sit each cartridge on its spigot in the base. Clean the lid O-ring and give it a little water-based lubricant.
- 5Centre the lid, fit the lock ring and tighten it (about 3½ turns) until the safety catch engages. Open the valves and start the pump.
Every number this part goes by
- Retail name:
- 78083
Sellers list any of these; they are the same part.
About your AstralPool CL400
AstralPool pool filter — Viron CL cartridge filter (discontinued). Its cartridge is the Viron CL400 cartridge element 78083, part 78083.
Where the model number is: The model is on the label on the filter tank or under the lid (Zodiac CS150, Hayward C150S). On an above-ground pump it is on the pump's label or the box (Intex model 604 or item 28604, Bestway 58383); on an inflatable spa, on the box or the pump unit's label (Lay-Z-Spa Miami, Intex SB-H20). If the label has worn off, measure the old cartridge's length and diameter.
Fits this AstralPool model
AstralPool1 model
This filter takes 4 cartridges.
Common questions
- Which cartridge fits the AstralPool CL400?
- The AstralPool CL400 takes the AstralPool Viron CL400 cartridge element 78083. This filter takes 4 cartridges.
- Where can I buy the 78083 in Australia?
- We track 3 Australian sellers for the 78083; the lowest listed price when we last checked was A$81.00 at Heater and Spa Parts. Prices are re-checked daily and dated on this page.
- How do I fit the 78083 in an AstralPool CL400?
- 5 steps, listed on this page with the replacement video where the maker has one.
- What happens if I don't change it?
- A clogged cartridge slows the flow and the pump works harder, and a torn one lets dirt back into the water, so the pool or spa clouds.
- Is there anything to reset afterwards?
- No reset light. Note the gauge reading with clean elements; AstralPool says to clean them when the gauge rises 20 kPa.
Something looks wrong with the CL400 match? . Reports go to a person, not a bot.