AstralPool Clear Series flap, gasket and shaft set D50 - 4404120194

AstralPool Clear Series flap, gasket and shaft set D50

The AstralPool Clear Series flap, gasket and shaft set D50 (reference 4404120194) is a complete replacement assembly for 50 mm Clear Series check valves. It includes the internal flap, central shaft and sealing gasket, allowing you to refurbish the moving and sealing elements of the non return valve in a single maintenance operation.

Complete internal assembly for Clear Series Ø 50 valves

Inside an AstralPool Clear Series check valve, the flap rotates on a shaft and presses against a sealing seat to prevent backflow when the pump stops or flow reverses. Over time, the flap surface, shaft and gasket can wear or accumulate deposits, which reduces closing efficiency. The AstralPool Clear Series flap, gasket and shaft set D50 groups these key parts together so you can restore the original non return function with one spare part.

By replacing the full assembly instead of individual components, you ensure that the new flap, shaft and gasket work together with the correct geometry and contact pressure, which is essential for reliable sealing in every operating cycle.

Restores reliable non return sealing

When the flap or gasket inside the check valve is worn, symptoms may include slow reverse flow when the pump is off, loss of prime on suction lines or small pressure drops that are difficult to trace. Fitting the AstralPool Clear Series flap, gasket and shaft set D50 renews the sealing surface and pivot support so the flap closes quickly and evenly against its seat.

• New flap with clean sealing edge for accurate closing.
• New shaft to guide smooth, centred flap movement.
• New gasket to maintain a watertight seal on the valve seat.

After installation, the transparent Clear Series body makes it easy to visually confirm that the flap opens fully with forward flow and closes completely when the pump stops.

Easy access with Clear Series transparent design

The AstralPool Clear Series flap, gasket and shaft set D50 is designed to be installed through the removable transparent lid of the Clear Series valve. The body’s threaded ring can be opened without tools, so you can remove the old internal assembly, clean the seating surfaces and fit the new parts with minimal downtime.

• Compatible with AstralPool Clear Series D50 transparent check valves.
• Internal components can be replaced without cutting the pipework.
• Ideal to combine with a new spring and lid seal during full refurbishment.

This service friendly construction is particularly useful in plant rooms where access is limited and rapid, clean interventions are important.

When to replace the flap, gasket and shaft set

Replacing the AstralPool Clear Series flap, gasket and shaft set D50 is recommended whenever inspection shows significant wear or damage, or when operating symptoms suggest that the internal non return mechanism is no longer sealing correctly.

• Visible wear, grooves or deformation on the flap sealing surface.
• Cracks, flattening or chemical degradation of the gasket.
• Excessive play or misalignment of the flap on its shaft.

A complete internal replacement is also good practice during major hydraulic renovations, especially in saltwater or highly used installations where components have been exposed to intensive operating cycles.

Installation recommendations

Installation of the AstralPool Clear Series flap, gasket and shaft set D50 must be done with the hydraulic line depressurised and the pump stopped. All work should follow the Clear Series instructions and general pool safety standards.

• Close isolation valves and release pressure before opening the check valve.
• Unscrew the locking ring, remove the transparent lid and carefully extract the old flap assembly.
• Clean the internal seating surfaces and remove any scale or deposits.
• Install the new flap, gasket and shaft set in the same orientation as the original parts.
• Reassemble the valve, tighten the lid uniformly and check for leaks and correct operation.

After reassembly, observe several pump start and stop cycles through the transparent body to confirm that the flap moves freely and that reverse flow is blocked effectively, confirming that the new D50 set is performing as intended.