Astralpool / Zodiac Body Only ZX200-250 Filter 7821302

Astralpool ZX 200 & ZX 250 Cartridge Filter Tank Body — 7821302 (also Zodiac ZXC / ZCF, Filtrite CF, Aquatight)

This is the genuine Astralpool tank body for the ZX 200 and ZX 250 cartridge filter, part number 7821302. It is the lower pressure vessel that holds the cartridge element — supplied on its own, to replace a tank that has cracked, split, crazed or is leaking below the lid. One tank moulding serves both the ZX 200 and ZX 250; the two differ in filtration area, not element size.

• Physically Stocked, unlike most "drop-shipping" websites.
• Shipped from VIC, NSW, WA, QLD

This is the same filter sold under several brands — Astralpool ZX, Hurlcon ZX, Zodiac ZXC, Zodiac ZCF / Titan ZCF, Filtrite CF and Aquatight. The Zodiac ZXC is simply the Zodiac-badged Astralpool ZX. Tank colour and part number have both changed across production runs, so confirm the model and element size before ordering.

The ZX Body Match Rule (rev. ZXB-1.0)

A tank body is sized to the filter model, not to the plumbing, so match it by model badge and confirm with a measurement:

1. Find the model number on the filter label, or moulded into the lid or tank. It reads ZX — or the Zodiac ZXC / ZCF or Filtrite CF — followed by a number.
2. This body, part 7821302, is the correct tank for the ZX 200 / ZXC 200 and ZX 250 / ZXC 250 only.
3. Confirm physically: pull the cartridge element and measure it. The 200 and 250 both take a tall 688mm-long × 230mm-diameter element.
4. If your badge reads 200 or 250 in any of those ranges and your element is the tall 688mm length, this is your body. A different size number, or a shorter element, needs a different tank — see the chooser below. Note: Astralpool XC is a separate, unrelated series and does not use this tank.

Worked Example

A customer at Sunbury has a filter with a bleached label, but the moulding on the tank shoulder reads ZX250. They pull the element: it measures 231mm across the end cap and about 686mm tall — the tall element. Badge says ZX250, element is the 688mm length — so this 7821302 body is correct. They order the body with a new tank O-ring (78110) and a fresh 250 element, because a tank old enough to split usually sits on a flattened O-ring and a tired element.

Which Tank Body Do I Need?

Will Not Fit — Order The Correct Tank Instead

• ZX50 / ZX75 (ZXC50/75) — shorter tank and element. Use the ZX50/75 body (7821102).
• ZX100 / ZX150 (ZXC100/150) — shorter tank. Use the ZX100/150 body (7821202).
• ZX310 — twin-element tank with an element coupler. Use the ZX310 body (7821702).
• Astralpool XC — a separate, unrelated filter series. The XC tank is not interchangeable with the ZX / ZXC tank despite the similar name. Contact us with your model and a photo.
• Hurlcon QX — a different filter with a 222mm lid, not part of the ZX family.

Compatible Filters — 200 & 250 Sizes

This 7821302 tank body serves the 200 and 250 size in each of these — all the same filter under different badges:

• Astralpool ZX / Hurlcon ZX: ZX200, ZX250
• Zodiac ZXC: ZXC200, ZXC250
• Zodiac ZCF / Titan ZCF: ZCF200
• Filtrite CF: CF200, CF250
• Aquatight: cartridge filters built on the ZX 200 / 250 tank

Matching cartridge elements: 200 element — 78099 (688mm × 230mm) · 250 element — 78094 (688mm × 230mm).

What's Included

• ZX / ZXC 200 / 250 filter tank body (lower pressure vessel), part 7821302

Not included: lid assembly, tank O-ring, cartridge element, pressure gauge and plumbing unions are separate items. Fit a new tank O-ring whenever you replace a tank — the old seal has taken a set to the old tank's sealing face.

Measurements & Identification

• Fits models: ZX200 / ZXC200, ZX250 / ZXC250 (and ZCF200, Filtrite CF200 / CF250)
• Element: tall 688mm long × 230mm diameter
• Part number: 7821302 (supplied as SP7821302)

Symptoms Of A Failed Tank

• A crack, split or weep low on the tank body, below the lid seal
• Water tracking down the outside of the tank when the pump runs
• Crazing or brittleness in the moulding from years of UV exposure
• A tank that has been over-pressurised, distorted or impact-damaged

Fitting Notes & Safety

• These are pressure vessels. Never work on the filter with the pump running or the system pressurised. Shut down, isolate power, close valves and release all pressure at the air bleed before you start.
• Transfer your fittings — drain cap, union tails and any bulkhead fittings — to the new tank, renewing their O-rings.
• Fit a fresh tank O-ring and lubricate it with a silicone-based lubricant only. Petroleum grease swells and destroys the seal.
• Hand-tighten the locking ring only. Over-tightening is what cracks lids and rings — and a fresh tank deserves a fresh start.
• On recommissioning, open the air bleed until water flows steadily, close it, and note the clean starting pressure on the gauge. Clean the element when pressure climbs 15–20 kPa above that figure.

Related ZX / ZXC Filter Parts

• ZX / ZXC lid assembly with handles & locking ring — SP7820502
• ZX / ZXC tank O-ring (lid seal) — 78110 / 78105
• ZX / ZXC air bleed plug & O-ring
• Full Astralpool ZX / Zodiac ZXC cartridge filter range & spare parts

Part Numbers & Search References

This tank body: 7821302 · SP7821302 · Body Only ZX200-250 · Astralpool ZX200 tank · ZX250 tank · Zodiac ZXC200 / ZXC250 filter body · Hurlcon ZX filter body · Zodiac ZCF200 tank · Filtrite CF200 / CF250 body · Aquatight ZX tank · ZX cartridge filter housing · Astral pool filter tank replacement.

Frequently Asked Questions

Does this body fit both the ZX200 and the ZX250?
Yes. Astralpool used one tank moulding, part 7821302, for both the ZX200 and the ZX250. The two models differ in filtration area, but run the same tall element in the same body.

How do I know I have a 200 or 250 and not another size?
Read the model number on the filter label or moulded into the lid or tank. If it reads ZX200, ZX250, ZXC200, ZXC250, ZCF200, Filtrite CF200 or CF250, this body is correct. Any other number needs a different tank.

My filter is a Zodiac ZXC. Is this the right body?
Yes. The Zodiac ZXC is the same filter as the Astralpool ZX, just Zodiac-badged. If it reads ZXC200 or ZXC250, this 7821302 body is correct.

My filter is an Astralpool XC. Is this the right body?
No. The XC is a separate, unrelated filter series and does not share the ZX / ZXC tank body. Contact us with your model and a photo and we will match the correct part.

Does the body come with the lid, O-ring or element?
No. The tank body is supplied on its own. The lid assembly, tank O-ring and cartridge element are separate items, all linked on this page. Fit a new O-ring whenever you replace a tank.

The ZX range is discontinued. Can I still get this body?
Yes. The ZX filter range has been superseded, but the serviceable parts including this tank body are still available. Replacing a tank on an otherwise sound filter is far cheaper than a whole new unit.

Is this a genuine Astralpool part?
Yes. This is the genuine Astralpool tank body, part 7821302. It is a special-order item.

Why would I replace the tank body rather than the whole filter?
A cracked or leaking tank is usually the only failed component. If your lid, ring, gauge and plumbing are sound, replacing just the body restores the filter at a fraction of the cost of a new one.

Manufacturer Catalogues, Diagrams & Part Numbers

Need exploded views, spare part numbers, product numbers, diagrams, or more product information? See the manufacturer catalogues: Astralpool Catalogue 2026 | Zodiac Catalogue 2026

As with all products, these must be diagnosed and fitted by a qualified and experienced person. This is a special-order item.