Astral Pool Threaded Collar (77720) – Maxim Pump, Filtrite MF, CA & ECA Series Media Filters

Genuine Astral Pool Threaded Collar — part no. / SKU 77720. 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.

Compatibility

• Astral Maxim pool pump
• Filtrite MF Media Filter
• Astral CA Series Media Filter
• Astral ECA Series Media Filter

Product Details

• Brand: Astral Pool
• Part number / SKU: 77720
• Genuine Astral spare part

Frequently Asked Questions

What does the threaded collar do?

The 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.

How do I know if this collar needs replacing?

Signs 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.

Does this suit the Astral Hurlcon Maxim as well?

The 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.