Description
Astralpool o-ring 4405010031
The Astralpool o-ring 4405010031 is a replacement elastomer seal designed to restore watertight joints on compatible Astralpool pool equipment. This standard round section seal fits in a dedicated groove between two mating parts and is compressed during assembly to prevent water and air from passing through the connection.
Main features of the Astralpool o-ring 4405010031
- Original style o-ring for selected Astralpool pool pumps and accessories.
- Round cross section for even compression in standard o-ring grooves.
- Manufactured from elastomer suitable for treated pool water.
- Exact dimensions matched to the groove specified for reference 4405010031.
Function in the filtration system
This o-ring is mounted between two rigid parts, such as a pump housing, cover, union or inspection cap. When the parts are tightened, the Astralpool o-ring 4405010031 is gently compressed, filling the gap and creating a watertight and airtight barrier. A good seal helps the pump maintain suction, prevents drips in the technical room and protects equipment against air entering the circuit.
- Provides reliable sealing under normal filtration pressure.
- Helps avoid air intake that can disturb pump priming and water flow.
- Reduces the risk of small leaks around lids, flanges or unions.
Compatibility and typical applications
The Astralpool o-ring 4405010031 is intended for use on specific Astralpool products that list this reference in their exploded view or spare parts list. The internal diameter and cord thickness are chosen to match the original groove, so the seal can be installed directly without modification.
- Suitable for Astralpool pool pumps or fittings that specify o-ring 4405010031.
- Ideal for replacing worn or damaged seals during routine maintenance.
- Recommended when refurbishing older equipment to restore original sealing performance.
Before ordering, it is good practice to check the parts diagram of your exact model to confirm that this is the correct o-ring reference.
When to replace the o-ring 4405010031
O-rings are consumable components that gradually lose elasticity under the combined effects of pressure, temperature changes and pool chemicals. A tired seal can allow small leaks or air to enter the system, which quickly affects filtration comfort.
- Flattened or shiny appearance from long term compression in the groove.
- Cracks, cuts or rough spots visible on the surface of the o-ring.
- Persistent drips or damp patches around the joint after starting filtration.
- Air bubbles under pump lids or in transparent sections even with correct priming.
Installation and good practice
Installing the Astralpool o-ring 4405010031 is simple, but careful preparation helps ensure a reliable seal and longer service life. The system must always be switched off and depressurised before opening any sealed component.
- Remove the old o-ring and clean the groove and mating surfaces to eliminate dirt and scale.
- Check the new o-ring for any visible damage and confirm it sits comfortably in the groove.
- Place the seal gently in position, making sure it is not twisted or stretched unevenly.
- Optionally apply a thin film of silicone based lubricant suitable for pool seals to reduce friction.
- Reassemble the parts and tighten evenly by hand, avoiding excessive force that could crush the o-ring.
After reassembly, restart the filtration system and inspect the joint during the first minutes of operation to ensure the area remains completely dry and that there is no air being drawn into the circuit.
Care for longer seal life
A few routine habits help the Astralpool o-ring 4405010031 provide effective sealing over many seasons.
- Maintain balanced water chemistry to limit chemical stress on elastomer parts.
- Clean sealing surfaces before closing lids or unions to avoid pinching grains of sand or dirt.
- Do not use tools to overtighten closures; hand tightening is usually sufficient.
- Replace seals preventively during major services instead of waiting for clear leaks.
With a correctly installed Astralpool o-ring 4405010031, compatible pool components regain secure, watertight joints that support stable, efficient filtration in everyday use.
