Zodiac Clearwater D25, EL-1 & Aquasphere Genuine Complete Chlorinator Cell - W202111

Zodiac Clearwater D25 / EL-1 Genuine Complete Chlorinator Cell

This is the genuine Zodiac Clearwater complete cell for the D25, EL-1 and Aquasphere D25 salt chlorinators — electrode and housing supplied together as one assembly. Supplied by an authorised Zodiac / Fluidra dealer and warranty agent, not an aftermarket copy.

• We keep these physically in stock for fast shipping or local pick-up, unlike most drop-shipping websites.
• Shipped from VIC, NSW, WA, QLD

Which Chlorinators Does This Cell Suit?

• Zodiac Clearwater D25
• Zodiac Clearwater EL-1
• Zodiac Aquasphere D25

It Does Not Suit These — Order These Instead

• Clearwater LM2 — uses a complete cell from the W2020xx range (buy here)
• Clearwater LM3 — uses an electrode from the W1965xx range (buy here)
• Clearwater C200 / C250 — uses W193871 (buy here)
• TRi / eXO iQ / EL (Compact, Mid, Large) — use the W1974xx electrode range (buy here)

See the full range of genuine Astralpool and Zodiac chlorinator cells and electrodes.

Supplied as a Complete Cell (rule CELL-1.0)

This part is the complete cell — the electrode and its housing supplied together as one assembly. There is no separate electrode-only part for this model, so a worn electrode means replacing the cell as a unit.

Before fitting, inspect the union o-rings in your pipework and replace any that are flattened, glazed or cracked. They are inexpensive and they are the usual cause of a leak after a cell change.

Specifications

• Part number: W202111 (Complete Cell D25 Packed)
• Plates: 11 solid plates
• Type: Reverse-polarity, self-cleaning
• Supplied as: Complete cell — electrode and housing together
• Brand: Zodiac Clearwater, a Fluidra brand

Chlorine output is set by the chlorinator's power supply, not by the electrode alone. The same cell can produce a different gram-per-hour figure in different models, which is why published output figures for these parts vary between sellers. Match on chlorinator model, not on a gram rating.

Warranty

This cell is covered by the Zodiac express warranty under the current Fluidra warranty schedule. The term depends on the chlorinator it is fitted to and on whether the installation is residential or commercial, so check the current figure on our warranty information page or ask us before you order. Cover is conditional — the conditions below are the ones that actually catch people out.

Warranty Conditions Worth Knowing

• It must be bought from a Fluidra Authorised Dealer. Zodiac's express warranty only applies to product purchased from an authorised dealer. We are one. A cell bought from an unauthorised online seller may not be covered at all.
• Cover starts 30 days after the date of purchase to allow for installation.
• Residential single-dwelling pools. Cells used at hotels, swim schools, rehabilitation centres, apartment or townhouse complexes and other multi-dwelling or commercial sites are covered for a shorter period.
• Water chemistry is a condition. Cover assumes water balanced to AS 3633, pH held between 7.2 and 7.8, and free chlorine not exceeding 4ppm. Damage from scaling or corrosion caused by out-of-balance water is excluded. Keep your test results.
• Register the product with myFluidra using the serial number and proof of purchase.

Full details on our warranty information page.

Why the Warranty Is Better Here

• We are an authorised Zodiac and Fluidra dealer and warranty agent, so buying from us satisfies the authorised-dealer condition on its own.
• Claims are assessed and handled by us in-house, not bounced to a supplier who bounces you to the manufacturer.
• Our team includes ex-Astralpool and ex-Hurlcon technicians who built and serviced this equipment.

Genuine Only — And Why That Matters

The replacement cell market is full of aftermarket, generic and copy electrodes, often listed so they look like the real thing. Non-genuine cells typically use a lighter titanium substrate and a lower-grade mixed-metal-oxide coating, which wears through early and drops chlorine output well before the promised life. Fitting a non-genuine part can also affect cover on the chlorinator itself. If a genuine cell is advertised well below the going rate, it is worth asking what is actually being sent.

Related Parts

• R0739000 — Zodiac electrode o-ring, set of 2. Suits TRi, eXO iQ, Hydroxinator iQ, EL, MagnaPool and Ei Xpert (buy here)

When to Replace

Replace the electrode when the chlorinator reports low output or a low-salt fault that persists after the salt level is confirmed correct, when the plates show bare titanium or flaking coating, or when chlorine production has clearly fallen off with balanced water. Scale on the plates is not failure — a scaled cell often recovers after cleaning. Check for scale before condemning a cell, particularly in hard-water areas.

Frequently Asked Questions

Is this the complete cell or just the electrode?
Complete. The D25 is supplied as a full cell assembly — electrode and housing together.

Does this suit the EL-1 as well as the D25?
Yes. The Clearwater D25, Clearwater EL-1 and Aquasphere D25 all use the same cell.

Is the EL-1 the same as the EL-25?
No, and this catches people out. The EL-1 uses this cell, W202111. The EL-25 is part of the TRi / eXO family and uses W197431. Check the label on your power pack.

How many plates does the D25 cell have?
Eleven solid plates, self-cleaning reverse-polarity.

Do I need a new cell lead as well?
Not usually, but the D25 / EL-1 output lead is a known wear point. If the lead is cracked, stiff or has corroded terminals, replace it at the same time — ask us and we will quote it.

Manufacturer Catalogues, Diagrams & Part Numbers

Need exploded views, spare part numbers, product numbers or diagrams? See the manufacturer catalogue: Astralpool Catalogue 2026

Before ordering: confirm this part is correct for your equipment. Use the catalogue above, seek professional assistance, or contact us with photos of your existing part, model details, serial numbers and any labels. As with all products, this must be diagnosed and fitted by a qualified and experienced person.

Common search terms: Zodiac W202111, D25 cell, Clearwater D25, EL-1 cell, Aquasphere D25 cell, Zodiac Clearwater salt cell, genuine D25 complete cell, WWDG SpaPro.