AstralPool gasket set D50 for multiport valve

AstralPool gasket set D50 for multiport valve

The AstralPool gasket set D50 for multiport valve (reference 4404120196) is a complete replacement seal kit for 50 mm selector valves on pool sand filters. It contains the main gaskets required to restore watertight sealing in the valve body and around the 50 mm connections, helping to solve leaks and performance issues in the filtration circuit.

Complete seal kit for 50 mm multiport valves

Over time, the internal and external seals of a multiport valve are exposed to pressure, temperature changes and pool chemicals. This can cause the gaskets to harden, deform or crack, leading to water leaks, air intake or internal bypass between valve positions. The AstralPool gasket set D50 for multiport valve provides the main seals in one package so you can refurbish the valve in a single maintenance operation.

The kit is designed for AstralPool selector valves with 50 mm connections and is particularly suited to Classic and similar models that use a D50 seal configuration. Using the correct reference ensures that gasket dimensions match the original design and that the handle can still be moved smoothly between positions after reassembly.

Restores watertightness and hydraulic performance

When multiport valve seals begin to fail, symptoms may include water leaking through the waste line in filter mode, drips from around the cover, or air entering the pump when the valve is switched. These problems reduce filtration efficiency and can cause noise or priming issues. By fitting the AstralPool gasket set D50 for multiport valve, you restore the sealing surfaces so water only flows through the intended ports in each selected position.

Renewed gaskets help the valve maintain stable pressure, avoid unwanted bypass and protect the pump and filter from operating with incorrect flow paths. This supports clean pool water and more reliable backwash cycles.

Typical contents and replacement situations

Although the exact composition may vary by model, the AstralPool gasket set D50 for multiport valve typically includes the main spider gasket or flat seal for the rotor area and O-rings or flat gaskets for the cover and 50 mm union connections. These are the components most exposed to mechanical and chemical wear during normal use.

• Central gasket for the rotor or diverter zone of the valve.
• Cover seal to prevent leaks around the top of the valve body.
• Connection gaskets or O-rings for D50 union fittings.

Replacement is recommended when there are visible cracks or deformation on the seals, when the valve starts leaking in certain positions or during a general refurbishment of the filter and valve assembly.

Installation recommendations

Installing the AstralPool gasket set D50 for multiport valve requires disassembling the valve cover and carefully cleaning the sealing seats. All work should be performed with the pump stopped and the system depressurised. A qualified pool technician or installer is recommended to ensure correct positioning of each gasket and to avoid damage to the valve body.

• Stop the pump, close valves and release pressure before opening the multiport.
• Mark the handle position and remove the cover to access the internal gaskets.
• Clean the sealing surfaces thoroughly and remove all traces of the old seals.
• Fit the new gaskets from the AstralPool D50 set and reassemble the valve carefully.

After reassembly, the valve should be tested in all positions to confirm that there are no leaks and that the handle rotates smoothly with the correct detent positions. Correct installation of the D50 gasket set helps extend the service life of the multiport valve and maintains safe, efficient filtration.