Universal Spa Filter C-4325/PA225/FC-1220/S4325

Compare the specifications of your current filter with these:
– Length: 330 mm (13 inch)
– Diameter: 125 mm (4.95 inch)
– Connection:
 • Top side: closed with handle
 • Bottom side: fine internal thread (SAE), 1.5 inch (± 38 mm internal diameter)

If your old filter code matches C-4325, PA225, FC-1220, or S4325, this is almost certainly the correct replacement. Commonly used in spas from, among others, Passion Spas, Sundance, and similar brands.

Want to be sure? Send us a photo or the dimensions of your old filter – we will gladly check it for you.

On average, you replace a spa filter every 2 to 3 months for optimal water quality and proper functioning of your spa. Even with regular cleaning, a filter eventually becomes saturated with dirt, oils, and lime.

How do you know it's time to replace your filter?

Pay attention to the following signals:
• The filter remains dirty despite thorough cleaning
• The material is damaged (cracks, frays, or deformation)
• The water remains cloudy or smells unpleasant
• The water flow decreases
• Your pump makes more noise or works harder than usual

If you use your spa frequently or with multiple people, it may be necessary to replace the filter more often than every 3 months. For those who want certainty, it's smart to keep a spare filter in stock and switch regularly.