Description
Astralpool rubber gasket set 0.75 HP to 1.25 HP 4405010403
The Astralpool rubber gasket set 0.75 HP to 1.25 HP 4405010403 is a complete sealing kit designed for Astralpool pool pumps in the 0.75 HP to 1.25 HP range. It includes the main rubber seals used around the prefilter, housing and unions, so you can restore watertight joints and stable suction on compatible pumps in a single maintenance operation.
Purpose of the Astralpool rubber gasket set
Over time, rubber gaskets in a pool pump are exposed to pressure cycles, temperature changes and pool chemicals. This gradually hardens and flattens the material, which can lead to drips, air ingress and noisy operation. The Astralpool rubber gasket set 0.75 HP to 1.25 HP 4405010403 groups the key seals for these pump sizes, making it easier to replace all critical gaskets at once instead of sourcing them individually.
By renewing seals together, you help the pump recover its original priming behaviour, reduce the risk of air bubbles under the prefilter lid and keep the technical room dry and clean.
What is typically included in the gasket set
This rubber gasket set is configured for Astralpool pumps between 0.75 HP and 1.25 HP and usually covers the main sealing points in the wet end. The exact content can vary by model, but the set is designed to match the exploded view and part references for the targeted power range.
- Main o-ring for the prefilter lid, ensuring an airtight closure of the strainer compartment.
- Housing gasket or o-ring between the pump body and seal plate or backplate.
- Union gaskets for suction and discharge connections where applicable.
- Additional small rubber rings for drain plugs or inspection points depending on the pump version.
Using a dedicated set ensures that all these seals have the correct dimensions and material for the specific Astralpool pumps in the 0.75 HP to 1.25 HP range.
Compatibility and typical applications
The Astralpool rubber gasket set 0.75 HP to 1.25 HP 4405010403 is intended for selected Astralpool pool pumps that list this reference as their rubber seal kit. It is particularly useful when servicing pumps of these power ratings that show signs of leaks or air entry but still have a mechanically sound motor and hydraulic body.
- Compatible with Astralpool pumps between 0.75 HP and 1.25 HP that specify kit 4405010403.
- Suitable for residential pools with sand, glass or cartridge filters.
- Ideal for refurbishment when the pump is opened for other work, such as mechanical seal or impeller replacement.
Always check the pump identification label and the official parts diagram to confirm that this gasket kit is the correct one for your model before ordering.
When to replace the gaskets
Rubber gaskets are consumable parts and should be replaced whenever their sealing performance becomes uncertain. Common symptoms of worn or damaged seals include small leaks, air bubbles in the pump lid and unstable filtration pressure.
- Flattened, shiny or hardened o-rings and gaskets that no longer spring back.
- Visible cracks, cuts or rough patches on the sealing surfaces.
- Persistent drips around the prefilter lid, unions or housing joint.
- Difficulty in priming the pump or repeated loss of prime during operation.
Replacing seals as part of a planned maintenance program helps prevent unexpected downtime during the swimming season.
Installation and good practice
Installing the Astralpool rubber gasket set 0.75 HP to 1.25 HP 4405010403 is normally carried out when the pump is already open for inspection or repair. Proper preparation and careful assembly will help the new gaskets deliver a long service life.
- Switch off the pump and isolate the electrical supply before starting work.
- Close valves and drain the pump housing to relieve pressure in the system.
- Disassemble the wet end according to the manufacturer instructions and remove all old gaskets and o-rings.
- Clean the grooves and sealing faces thoroughly, removing dirt, scale and old lubricant.
- Install each new rubber seal in its dedicated groove, making sure it is not twisted or stretched.
- Use a thin film of silicone based lubricant suitable for pool seals if recommended, to ease assembly and reduce wear.
- Reassemble the pump, reopen valves, prime the housing and check for leaks and stable operation during the first test run.
With a correctly installed Astralpool rubber gasket set 0.75 HP to 1.25 HP 4405010403, compatible pumps regain tight, reliable sealing at all main joints, supporting quiet, efficient filtration over many seasons.
