Keep your hot tub water clean, clear, and ready to enjoy with the Waterway Rainbow 25 Sq. Ft. Filter Cartridge. Designed to capture dirt, debris, body oils, and other contaminants, this premium replacement filter helps maintain superior water quality while improving the efficiency of your spa's circulation and filtration system.
Constructed with durable, high-quality filtration media, this cartridge delivers consistent performance and long service life when properly maintained. Whether you're replacing an old filter or stocking up on spare cartridges, the Waterway Rainbow 25 Sq. Ft. Filter is a reliable choice for many popular hot tub brands and models.
Key Features
✔ 25 square feet of filtration area
✔ Helps maintain crystal-clear spa water
✔ Captures dirt, debris, and contaminants
✔ Durable pleated filtration media
✔ Easy to remove, clean, and replace
✔ Compatible with numerous hot tub brands
✔ OEM-style replacement performance
Specifications
| Specification |
Details |
| Filtration Area |
25 Sq. Ft. |
| Length |
13-5/16" |
| Diameter |
4-15/16" |
| Top Opening |
2-1/8" ID |
| Bottom Opening |
2-1/8" ID |
| Filter Type |
Replacement Cartridge |
Compatible With
- Waterway Rainbow Systems
- Sundance 680 Series (Prior to 2023)
- PDC Luxury Series Bali Spa
- Accent Spas
- Beachcomber
- Coleman Spas
- Hydropool
- Hot Spring Spas
- Nordic Hot Tubs
- Viking Spas
- Jacuzzi Premium
- Coast Mountain Spas
- Endless Pools
- PDC Spas
- Waterway Plastics
And many more compatible spa models.
Cross Reference Part Numbers
Also known as:
- PRB25-IN
- C-4326
- Waterway Rainbow 25 Sq. Ft.
Always verify filter dimensions and end-cap style before ordering.
Why Replace Your Hot Tub Filter?
Replacing your spa filter regularly helps:
- Improve water clarity
- Reduce strain on pumps and heaters
- Increase filtration efficiency
- Improve sanitizer effectiveness
- Extend the life of spa equipment
For best results, clean your filter regularly and replace it according to your spa manufacturer's recommendations.
