Astralpool / Zodiac Cap ZX Filter Drainage Blank 78218

Astralpool ZX / Zodiac ZXC Filter Drain Blanking Cap (with Drain) - 78218

Genuine Astralpool blanking cap with drain for the ZX-family cartridge filter, part number 78218. It seals the 50mm port on the base of the ZX tank and carries a small screw drain for winterising or emptying the filter. Supplied on its own.

• 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, Astral SMART, Filtrite CF and Aquatight. The Zodiac ZXC is simply the Zodiac-badged Astralpool ZX.

Cap With Drain, Or Plain Blank?

Astralpool makes two caps for this 50mm port - order the right one:

• 78218 - blanking cap with a screw drain (this item).
• 78214 - plain 50mm blanking cap, no drain. Get the plain version here.

Fits Across The ZX Range

• Astralpool ZX / Hurlcon ZX: ZX50 to ZX310
• Zodiac ZXC: ZXC50 to ZXC310
• Zodiac ZCF / Titan ZCF: ZCF75 to ZCF200
• Astral SMART / Filtrite CF / Aquatight: ZX-style cartridge filters

Will Not Fit

• Astralpool XC - a separate, unrelated filter series. Contact us with your model and a photo.

Part Numbers & Search References

78218 · SP78218 · Cap ZX Filter Drainage Blank · ZX drain cap · 50mm blanking cap with drain · Zodiac ZXC filter drain plug · Hurlcon ZX drain blank.

Frequently Asked Questions

Does this cap have a drain?
Yes. Part 78218 is the blanking cap with a screw drain. The plain blank with no drain is part 78214.

Which port does it fit?
The 50mm port on the base of the ZX tank.

My filter is a Zodiac ZXC. Is this the right cap?
Yes. The Zodiac ZXC is the same filter as the Astralpool ZX, just Zodiac-badged, so this cap fits.

My filter is an Astralpool XC. Is this the right cap?
No. The XC is a separate, unrelated filter series. Contact us with your model and a photo and we will match the correct part.

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.