{"product_id":"astral-pool-threaded-collar-77720-maxim-pump-filtrite-mf-ca-eca","title":"Astral Pool Threaded Collar (77720) – Maxim Pump, Filtrite MF, CA \u0026 ECA Series Media Filters","description":"\u003cp\u003eGenuine \u003cstrong\u003eAstral Pool Threaded Collar\u003c\/strong\u003e — part no. \/ SKU \u003cstrong\u003e77720\u003c\/strong\u003e. This threaded collar connects the pump outlet to the filter inlet on Astral Maxim pump systems and Filtrite MF, CA, and ECA series media filters. A worn, cracked, or cross-threaded collar causes leaks at the pump-to-filter connection and can reduce system pressure. Replacing it restores a secure, leak-free joint.\u003c\/p\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAstral Maxim pool pump\u003c\/li\u003e\n\u003cli\u003eFiltrite MF Media Filter\u003c\/li\u003e\n\u003cli\u003eAstral CA Series Media Filter\u003c\/li\u003e\n\u003cli\u003eAstral ECA Series Media Filter\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: Astral Pool\u003c\/li\u003e\n\u003cli\u003ePart number \/ SKU: 77720\u003c\/li\u003e\n\u003cli\u003eGenuine Astral spare part\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3\u003eWhat does the threaded collar do?\u003c\/h3\u003e\n\u003cp\u003eThe threaded collar secures the connection between the pump outlet and the filter inlet. It threads onto the filter tank fitting and holds the pump union or pipe fitting in place, creating a watertight joint. A damaged or leaking collar is a common cause of water loss at the pump-filter connection point.\u003c\/p\u003e\n\n\u003ch3\u003eHow do I know if this collar needs replacing?\u003c\/h3\u003e\n\u003cp\u003eSigns of a failing threaded collar include water leaking from the pump-to-filter connection, visible cracking or thread damage on inspection, or the collar being unable to tighten securely. If the collar is cross-threaded, it should be replaced rather than forced.\u003c\/p\u003e\n\n\u003ch3\u003eDoes this suit the Astral Hurlcon Maxim as well?\u003c\/h3\u003e\n\u003cp\u003eThe Astral Maxim and Hurlcon Maxim are the same pump product marketed under both brand names. Part 77720 suits both. If you are unsure whether this is the correct collar for your specific pump or filter configuration, contact us with your equipment model numbers before ordering.\u003c\/p\u003e","brand":"Astral","offers":[{"title":"Default Title","offer_id":53406427840787,"sku":"77720","price":47.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0716\/0591\/1827\/files\/Screenshot2026-08-27112928_5aba61f4-2a40-4595-b427-1f3d532b1799.png?v=1787794717","url":"https:\/\/poolshop.com.au\/products\/astral-pool-threaded-collar-77720-maxim-pump-filtrite-mf-ca-eca","provider":"Pool Shop Australia","version":"1.0","type":"link"}