The Magnum RD50 is a high‑performance 50 sq. ft. pleated spa filter cartridge designed to maintain clean, clear, and healthy spa water. Built with durable filtration media, it captures dirt, oils, and debris while maintaining strong water flow and system efficiency. It is a widely used universal replacement compatible with dozens of spa brands and skimmer/filter systems.
This RD50 cartridge fits on the Leisurerite Spa 2020 and many popular hot tubs such as Arctic Spas, Maax, Jacuzzi, Beachcomber, Waterway, and others. It features open top and bottom ends (54 mm holes) and a 125–129 mm diameter, depending on brand variation.
| Feature | Specification |
| Diameter | 125 mm – 129 mm |
| Length | 334 mm – 338 mm |
| Top End | Open – 54 mm hole |
| Bottom End | Open – 54 mm hole |
| Filtration Area | 50 sq. ft. |
Maintenance Guidelines.
Clean every 2–4 weeks, depending on spa usage.
Replace every 12 months or when showing wear, per manufacturer guidance.
Rinse with hose; use filter cleaning solutions for deeper maintenance.
