AstralPool Clear Series check valve Ø 63 with spring

AstralPool Clear Series check valve Ø 63 with spring

The AstralPool Clear Series check valve Ø 63 with spring is a transparent non return valve for 63 mm pool pipework. Its clear PVC body and lid let you see the internal flap and water flow at a glance, while the integrated spring provides fast, secure closing to prevent backflow in filtration, heating and treatment circuits.

Spring assisted non return protection

This Clear Series model uses a calibrated internal spring to help the flap close immediately when the pump stops or when flow reverses. The spring assisted design improves sealing reliability in both horizontal and vertical installations and reduces the risk of water draining back through filters, heat pumps or salt chlorinators when the system is off.

The spring force is optimised so that the valve opens with minimal effort and then lifts the flap almost fully out of the flow path, keeping pressure loss very low during normal circulation.

Transparent body for instant visual control

The AstralPool Clear Series check valve Ø 63 with spring is manufactured in PVC U with a fully transparent body and lid. This gives 360 degree visibility of the flap, allowing you to confirm at any time whether water is flowing in the correct direction and whether the valve is opening and closing correctly.

The transparent housing also acts as a compact sight glass in the line, making it easier to detect air pockets, dirt or scale that may affect the hydraulic performance of the pool system.

Low pressure loss and easy maintenance

Despite the presence of a spring, the wide opening flap design ensures minimal head loss when the valve is open. The Clear Series concept includes a removable threaded lid that can be unscrewed by hand, giving direct access to the flap, spring and seals for cleaning or replacement.

• Wide opening flap for low resistance in filtration and heating circuits.
• Hand removable threaded ring for quick lid removal.
• Union connections on inlet and outlet for easy installation and removal.

Routine maintenance is usually limited to periodic inspection and cleaning of internal parts, which helps extend the service life of the valve and maintain stable flow conditions.

Durable materials for modern pool systems

The AstralPool Clear Series check valve Ø 63 with spring is moulded from PVC U with high chemical and mechanical resistance, suitable for use with chlorinated and saltwater pools. The internal spring is corrosion protected for long term reliability within the typical pool operating range of up to 3.5 bar and water temperatures between about 10 and 30 °C.

This robust construction makes the valve suitable for both new installations and renovations of medium and large residential or small commercial pools using 63 mm pipework.

Typical installation positions

Thanks to its Ø 63 union connections and compact form, this check valve can be placed at several strategic points in the hydraulic system wherever backflow must be prevented and visual monitoring is useful.

• On the discharge line between pump and filter to stop reverse circulation.
• Upstream of a heat pump, heat exchanger or solar loop to prevent draining.
• In lines feeding salt chlorinators or dosing equipment to stabilise flow direction.

Correct orientation following the flow direction arrow is essential. The spring assisted Clear Series Ø 63 model is particularly recommended when the valve is mounted horizontally or wherever quick, positive closing is required for reliable non return protection.