Watkins Caldera 35 Sq Ft. Hot Tub Filter - Drop In - Replaces Unicel C-4335, Pleatco PRB35-IN, Guardian 409-219, Filbur FC 2385, Rainbow 17-2464 InSparation Hot Tub / Swim Spa

Hot Tub / Swim Spa Filter (no removable core) fits HYDROPOOL Self-Cleaning Swim Spas and Hot Tubs

2007-2014 Hawthorne and Hartford 680 Series models

The Caldera / Hot Spring 50 Sq Ft

FreeFlow® Spas

Deactivates metals and clarifies spa water

Watkins Caldera 35 Sq Ft. Hot Tub Filter - Drop In - Replaces Unicel C-4335, Pleatco PRB35-IN, Guardian 409-219, Filbur FC 2385, Rainbow 17-2464 InSparation Hot Tub / Swim SpaUse coupon code for additional savings! This filter replaces Unicel C 4335, Pleatco PRB35 IN, Guardian 409 219, Filbur FC 2385, Rainbow 17 2464. The Caldera 35 Sq Ft. Hot Tub Filter is a high quality filter manufactured by Watkin, with a finer pleat count for better water filtration. Caldera Vacanza Series Aventine. This filter also works on the Caldera Highland Series Aventine. Great Lakes Spas: Emerald, Sunlighter Trident, & Forte This filter fits