Check Compatibility Before You Buy
Unicel® C-5345 – 45 Sq Ft Rainbow/Waterway Spa Filter Cartridge – part #C-5345
-
45 sq ft spa filter cartridge designed for Rainbow, Waterway, and compatible spa systems requiring open-ended filters.
-
Made from Reemay® polyester media to provide superior filtration of fine particles, body oils, and other debris.
-
Open top and bottom with 2-1/8" inner diameter for easy installation and compatibility with standard spa filter housings.
-
Measures 10-1/8" in length and 5-5/16" in outer diameter—perfect for many compact spa systems.
-
Helps maintain clean, clear water and reduces strain on pumps, heaters, and plumbing.
-
Reusable with regular rinsing and monthly deep cleaning using spa filter cleaner.
-
Should be replaced every 12 months or as needed based on spa usage and water quality.
-
Manufactured by Unicel®, a trusted industry leader in pool and spa filtration.
Frequently Asked Questions
Authentic Unicel Parts
Never worry about compatibility issues
FAST, FREE SHIPPING
Quick and reliable delivery to you when you need them
SATISFACTION GUARANTEED
We stand behind every product we sell.
EXPERT SUPPORT
Our team knows all products inside and out
COMPETITIVE PRICING
Premium quality at prices that won't drain your wallet
EXTENSIVE INVENTORY
Everything you need for complete spa care
