Due to high demand, this item is currently out of stock. Be the first to receive your items by placing a pre-order today. This item will automatically ship when the manufacturer has more inventory in mid January

The ideal accessory for the BrewRO System. See the total dissolved solids in the water entering and exiting the filter system. Measured in parts per million, the outgoing reading should be 2 ppm or less. When the reading shows 3 ppm or above, it's time to replace the filters.