Waterway, Rainbow, CMP

Filter For PRB35, C-4335, FC-2385 The filter for PRB35, C-4335, FC-2385 by ProAqua is the PA-1435 hot tub filter cartridge which is a compatible replacement made in New Zealand for the Pleatco PRB35-IN, Unicel C-4335 and Filbur FC-2385 spa filters. Details: Diameter: 5" Length: 9 1/4" Top Hole: 2 1/8" Bottom Hole: 2 1/8" Brand: ProAqua