Astral Hurlcon Multiport Valve Lid / Cover O-Ring (75919) – 40mm

Replacement Astral Hurlcon Multiport Valve Lid / Cover O-Ring — part no. 75919. This is the large O-ring that seals the multiport valve lid (cover) to the valve body on Astral and Hurlcon sand filter multiport valves. A worn or cracked lid O-ring causes water to leak from the top of the multiport valve. Replacing this O-ring restores a watertight seal and stops the leak.

Compatibility

Suits Astral / Hurlcon multiport valves from September 2009 to current, including the following filter models:

• ECA550 / ECA650
• CA280 / C280
• FG604
• RX180 / RX280 / RX320
• E550 / E650

Product Details

• Part number / SKU: 75919
• O-ring size: 40mm (lid/cover seal)
• Material: rubber
• Suits: Astral / Hurlcon multiport valves (Sep 2009 – current)

Frequently Asked Questions

How do I know if this O-ring needs replacing?

If water is leaking from the top of your multiport valve — around the lid or handle area — the lid O-ring is the most likely cause. Remove the multiport valve lid and inspect the O-ring for cracks, flattening, or deformation. Even if the O-ring looks intact, if it has been in service for several years it may have lost its elasticity and should be replaced as a precaution when the valve is open for servicing.

Does this suit pre-September 2009 Astral multiport valves?

No — part 75919 suits Astral / Hurlcon multiport valves manufactured from September 2009 to current. Pre-September 2009 valves use a different O-ring. If you are unsure of your valve’s manufacture date, check the label on the valve body or contact us with your filter model and we can confirm the correct part.

Should I lubricate the O-ring when fitting it?

Yes — apply a small amount of silicone-based O-ring lubricant (not petroleum-based grease) to the O-ring before fitting. This helps the O-ring seat correctly, prevents pinching during assembly, and extends its service life. Do not use petroleum-based lubricants as these degrade rubber O-rings.