Ispring Fd15 Deionization Replacement Filter Fit Ro/Di Water Filter, 1 Count Product Details Product Description Perfect for Reverse Osmosis DI Water System - Remove Hard Water material - To be replaced every 500-1000 gallons of water, produce 0ppm for your water - Fit 1/4" Fitting (not included) - Clear housing for easy view of media status - Refillable. From the Manufacturer Perfect for Reverse Osmosis DI Water System - Remove Hard Water material - To be replaced every 500-1000 gallons of water, produce 0ppm for your water - Fit 1/4" Fitting (not included) - Clear housing for easy view of media status - Refillable Re-fillable DI filter for RO DI system 2.5" x 10" inline filter Fits most RO DI systems, including those brand name models Refill 0 ppm Ion DI(De-Ionized), remove hard water material from the water and create 0-1ppm Great in reducing TDS level in your water Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.