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Astralpool / Zodiac Spigot-Zx Filter Element Lid

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Astralpool ZX / Zodiac ZXC Cartridge Element Locating Spigot (Plug) - 78203

Genuine Astralpool element locating spigot (locating plug), part number 78203. It centres and locates the cartridge element under the filter lid on the taller ZX filters, keeping the element seated square so water cannot bypass it. Supplied on its own.

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

The Zodiac ZXC is simply the Zodiac-badged Astralpool ZX, so this spigot suits both.

Which Filters Use It?

The locating spigot is fitted to the taller cartridge filters where the element needs positive location under the lid:

  • Astralpool ZX 250 / Zodiac ZXC 250
  • Astralpool ZX 310 / Zodiac ZXC 310
  • Other taller Astral / Hurlcon cartridge filters using the same lid and element arrangement

The shorter single-element ZX filters (50 to 200) generally do not use a separate locating spigot. If you are unsure, send us a photo of your filter with the lid off.

Goes With

Will Not Fit

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

Part Numbers & Search References

78203 · SP78203 · Spigot ZX Filter Element Lid · ZX locating plug · ZX element spigot · Zodiac ZXC element locator · Hurlcon ZX250 ZX310 spigot.

Frequently Asked Questions

Which filters use this spigot?
Mainly the taller cartridge filters - the ZX 250 and ZX 310 (Zodiac ZXC 250 / 310) and similar Astral / Hurlcon models where the element locates under the lid.

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

My filter is an Astralpool XC. Is this the right part?
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.

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78203

Important Information
Brand Information

We are an authorised dealer, retailer, and/or service & warranty agent for many leading brands, including: Fluidra (AstralPool, Zodiac, Hurlcon), Aeware, Air Supply of the Future, Aqua-Flo, Balboa, Celsior, CG Air, CMP, Custom Moulded Products (CMP), Darlly, Davey, Del Ozone, Dontek, Edgetec, Emaux, Filtrite, Gecko, Goulds, Harwil, Henden, Herga, Honeywell, HydroAir, HydroQuip, ITT, Jandy, Joyonway, Laing, Len Gordon, Lo-Chlor, LX, LX Whirlpool, Magic Plastics, Magnum, Monarch, Onga, Pentair, PoolSystems, Presair, Raypak, Reemay, Rheem, Rising Dragon, S&P, Sensaheat, Spa-Craft, Spa-King, SpaNet, Spa-Quip, SpaTex, SpaZazz, Tecmark, Therm Products, Thermcore, Waterco, Waterway, Weld-On, Whirlpool, Xylem, and others.

We also sell parts for many spa and swim spa brands, including parts to suit Alpine Spas, Artesian Spas, AquaPulse Spas, Balboa spas, Bullfrog Spas, Caldera Spas, Canadian Spa Company, Cedar Spas, Chinese import spas, Coast Spas, Costco spas, Cyclone Spas, Davey spas, Decina, Designer Spas, Dimension One Spas, eBay spas, Endless® Spas, Fastlane Pools, Fisher Spas, Gecko spas, Halo Spas, H2O Spas, H20 Spas, Heritage Spas, HotSpring Spas, HydroQuip spas, Impact Spas, Jacuzzi, Just Spas, Just Swim Spas, LA Spas, Lanark Spas, Leisurite Spas, Maax Spas, Monarch Spas, MySpa, O2 Spas, Oasis, Sapphire Spas, Sapphire Swim Spas, SCS Spas, Signature Spas, Silver Spas, Spa Industries, Spa-Quip spas, SpaNet spas, Spas Direct, Sundance Spas, Sunrans, SwimEx, Trueform Spas, Tuff Spas, Urban Pool, Vortex®, Vortex® Swim Spas, and many others.

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  • Handy PVC Plumbing Size Info

    Plumbing sizes can be confusing. Pressure PVC pipe use nominal sizes - the size is simple a name, not the measured dimension. This convention is used across most pool and spa systems so that pipes and fittings remain compatible.

    • 50mm / 2" = ~60-61mm OD
    • 40mm / 1.5" = ~48mm OD
    • 25mm / 1" = ~33-34mm OD

  • Plug Types & Styles

    Common plug types found on spa equipment are AMP, Mini JJ, C38 (Aus 3-pin), Gecko in.link, etc. For more information please click here.

    • AMP plugs are the most common type used for over 20 years.
    • Many Mini J&J plugs are no longer available and must be modified.
    • C38 is the common Australian 3-pin plug found in normal household outlets.
    • Gecko (Aeware) in.link style plugs are no longer available and must be modified.
General Information & Disclaimers

Many products we supply are OEM-supplied and may not include retail packaging, printed instructions, or accessories. Refer to the product listing for details, or contact us if unsure.

Product images are for illustration only. Actual items may vary due to manufacturer changes, updates, and other variations. Images may show a full assembly, a partial assembly, or a specific component only. They are provided for identification purposes and do not by themselves define what is included. Please read the title and description carefully.

All products must be installed and used by qualified and experienced persons in accordance with applicable Australian standards and manufacturer requirements. We are a parts supplier, similar to an electrical, plumbing, or automotive parts supplier. We sell parts, but cannot always provide exact installation, troubleshooting, or system design advice. Buyers are expected to know what they are doing or use a qualified professional.

Contact us before ordering if your order is urgent, to confirm availability before purchasing.

® Trademark Information

All trademarks, brand names, and logos displayed on this website are the property of their respective owners. Heater & Spa Parts is an independent Australian supplier of replacement parts and accessories. Use of trademarked names, logos, and brands is for identification and compatibility purposes only, unless otherwise stated.

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