Description
Astralpool o-ring 180 x 5 mm 4405010440
The Astralpool o-ring 180 x 5 mm 4405010440 is a large diameter replacement seal designed for compatible Astralpool pool equipment. With an internal diameter of around 180 mm and a 5 mm cross section, it restores a watertight and airtight joint on lids, flanges or inspection covers where a wide sealing surface is required.
Main features of the o-ring 180 x 5 mm
- Original style o-ring with 180 mm inner diameter and 5 mm section.
- Designed for Astralpool components that specify reference 4405010440.
- Round cross section for uniform compression in the dedicated groove.
- Elastomer material suitable for treated pool water and normal operating temperatures.
Function in the filtration system
This o-ring is installed between two rigid parts, such as a large lid, inspection cover or pump or filter flange. When the assembly is closed and tightened, the Astralpool o-ring 180 x 5 mm 4405010440 is slightly compressed, filling the gap and blocking any passage of water or air. A sound seal helps the pump maintain correct priming, supports stable pressure at the filter and keeps the technical area dry.
- Provides a watertight and airtight barrier on large diameter joints.
- Helps prevent drips and seepage around covers and flanges.
- Reduces the risk of air being drawn into the system on the suction side.
Compatibility and typical applications
The Astralpool o-ring 180 x 5 mm 4405010440 is intended for use on specific Astralpool pool pumps, filters or accessories that list this reference in their exploded view or spare parts list. Its dimensions are matched to the original groove and clamping system, so it can be installed directly without modification when servicing compatible equipment sourced through PoolParthub.com.
- Suitable for Astralpool units that specify o-ring 4405010440 as the main large seal.
- Ideal for replacing worn or flattened seals on large inspection covers or flanges.
- Recommended during refurbishment of older equipment to restore original sealing performance.
To avoid sizing errors, always confirm the reference in the documentation of your exact model before ordering.
When to replace the Astralpool o-ring 4405010440
O-rings are consumable components that gradually lose elasticity under pressure, temperature changes and exposure to pool chemicals. On large diameter seals, even small defects can quickly lead to visible leaks or air intake.
- Flattened or shiny appearance from long term compression in the groove.
- Cracks, cuts or rough areas visible on the sealing surface.
- Persistent moisture or drips around the joint despite correct tightening.
- Air bubbles visible in the pump lid or transparent sections during operation.
Replacing a tired seal with a new Astralpool o-ring 180 x 5 mm 4405010440 is a simple and effective way to recover reliable sealing on large joints.
Installation and maintenance tips
Fitting the Astralpool o-ring 180 x 5 mm 4405010440 is straightforward, but careful preparation helps ensure a durable seal. The system must always be switched off and depressurised before opening any component that uses this o-ring.
- Isolate the pump, close valves and release pressure from the relevant section.
- Remove the old o-ring and clean the groove and mating surfaces to remove dirt and scale.
- Check that the new o-ring is clean, undamaged and sits naturally in the groove without twisting.
- Place the seal evenly around the full circumference, avoiding stretching one section more than another.
- Optionally apply a thin film of silicone based lubricant suitable for pool seals to ease assembly.
- Reassemble the cover or flange and tighten the closures evenly in a cross pattern to compress the o-ring uniformly.
After restarting filtration, inspect the joint for several minutes to confirm that the area remains completely dry and that no air is entering the system.
Good practice for long term sealing
A few simple habits help the Astralpool o-ring 180 x 5 mm 4405010440 deliver reliable performance over many seasons of pool use.
- Maintain balanced water chemistry to limit chemical stress on elastomer parts.
- Clean sealing surfaces before closing large covers to avoid pinching grains of sand or debris.
- Do not overtighten clamps or screws, as excessive compression can deform the o-ring.
- Replace the seal preventively during major services or whenever the cover is fully overhauled.
With a correctly installed Astralpool o-ring 180 x 5 mm 4405010440, compatible lids and flanges recover secure, watertight joints that support stable, efficient filtration in daily operation.
