Description
Astralpool mechanical seal for pool pumps 4405010118
The Astralpool mechanical seal for pool pumps 4405010118 is the original shaft seal assembly used in a range of Astralpool circulation
pumps. Positioned between the motor and the hydraulic body, it prevents pool water from leaking along the motor shaft, protecting the
motor bearings and ensuring long term, reliable operation of the filtration system.
Role of the mechanical seal in Astralpool pumps
In a centrifugal pool pump, the mechanical seal is one of the most critical components. It sits around the motor shaft behind the
impeller and creates a dynamic seal between the rotating shaft and the stationary pump housing. The Astralpool mechanical seal 4405010118
is engineered to withstand continuous rotation, pressure fluctuations and treated pool water, maintaining a watertight barrier while the
pump runs for many hours each day.
A sound mechanical seal helps keep the motor compartment dry, prevents corrosion of the shaft and bearings, and reduces the risk of
sudden pump failure during the swimming season.
Compatibility with Astralpool pump ranges
This mechanical seal is used on several popular Astralpool pool pump families in the residential segment. It is the reference seal for
specific versions of Astralpool Sena, Victoria Plus, Victoria Plus Silent and related models that use the 4405010118 code in their
exploded view and spare parts list. Using the original Astralpool seal ensures that dimensions, materials and spring characteristics
match the pump design exactly, so the seal seats correctly in the housing and around the shaft.
When selecting a replacement, always check the identification plate of your pump and the official parts diagram. If 4405010118 is
indicated as the mechanical seal reference for your model, this is the correct OEM part to use.
When to replace the mechanical seal 4405010118
Mechanical seals work in a demanding environment where rotation, pressure, temperature changes and pool chemicals gradually wear the
sealing faces and elastomers. Even with balanced water and normal use, they are considered consumable components that should be renewed
when early signs of leakage appear or during major pump servicing.
- Visible water dripping between the pump body and motor flange during operation.
- Rust marks or damp areas around the underside of the motor.
- Unusual noise from the motor bearings caused by water ingress over time.
- Major pump overhaul where the impeller and diffuser are already being replaced.
Replacing a tired seal with the Astralpool mechanical seal 4405010118 reduces the risk of motor damage and helps the pump regain its
original reliability.
Installation and maintenance recommendations
Installing a mechanical seal requires care and cleanliness. Work should always be carried out with the pump isolated electrically and the
hydraulic circuit depressurised. Many pool professionals replace the seal at the same time as the impeller and key gaskets to avoid
repeated disassembly.
- Switch off the power supply, close valves and drain the pump housing before dismantling.
- Separate the wet end from the motor and remove the impeller to access the old seal.
- Carefully extract the stationary part from the pump body and the rotating part from the impeller or shaft sleeve.
- Clean the seating surfaces thoroughly and avoid scratching the contact faces.
- Press the new stationary seat squarely into its recess and slide the rotating part onto the shaft without forcing it.
- Never touch the polished sealing faces with bare fingers; use clean gloves to avoid contamination.
After reassembling the pump, prime the prefilter fully with water and observe the seal area during the first minutes of operation to
confirm that it remains completely dry.
Benefits of using the original Astralpool seal 4405010118
Choosing the genuine Astralpool mechanical seal for pool pumps 4405010118 instead of a generic alternative offers several advantages in
terms of fit, durability and overall system reliability. The seal is designed specifically for the shaft diameter, spring preload and
housing geometry of the compatible pumps, which helps maintain correct closing pressure on the seal faces and minimises the risk of
premature leakage.
With the correct mechanical seal installed and the pump operating under normal conditions, your Astralpool filtration system can run
smoothly and efficiently, protecting the motor and ensuring clear, well filtered water throughout the swimming season.
