Filter PDM25P4 Filter Replaces: PDM25-XP4 (Remove Adapter) Size:ULTRA-S1 REPLACES PDM25P4 Description: Cartridge Diameter: 4-3/4" Length: 8-1/8" Top: Posigrip Bottom: 1-1/2" MPT Replaces: PDM25-XP4 (Remove Adapter) pH Stable is a water

pH Stable is a water balancing chemical for your hot tub that will maintain a stable level of pH by ensuring the pH range does not change erratically

If after rinsing your filter there is still discolouration in the pleats or if it still smells dirty

Arctic Pure Easy Clear

Provides 300% more surface area than competitive products and will not get clogged in water lines

Filter PDM25P4 Filter Replaces: PDM25-XP4 (Remove Adapter) Size:ULTRA-S1 REPLACES PDM25P4 Description: Cartridge Diameter: 4-3/4" Length: 8-1/8" Top: Posigrip Bottom: 1-1/2" MPT Replaces: PDM25-XP4 (Remove Adapter) pH Stable is a waterPDM25P4 Description: Cartridge Diameter: 4 3 4" Length: 8 1 8" Top: Posigrip Bottom: 1 1 2" MPT Related Products: 4CH 21 OC4 21 PA AP40191 PA 421 FC 0136 FC 0121 Replaces: PDM25 XP4 (Remove Adapter)