No one wants to relax in a tub full of chlorine. Prevent this nasty chemical from negatively affecting your body chemistry by simply attaching the Bath Ball Faucet Filter under the tub faucet. Say goodbye to chlorine and it’s effects: brittle hair, dry skin, burning eyes and lungs. Water flows into openings in the top as the KDF filter media (a high-purity copper/zinc formulation) releases water that's 95% chlorine-free. You'll notice the difference in water quality with your first bath. 4" diameter. 3-4 GPM. Replace filter every 8-12 months. USA.