Design for In-tank resin filter - suits most coffee machine tank inlet hoses that take this style of filter. Typically to capture the calcium and magnesium ion within the resin beads. The loosely held sodium will be release and pass into the machine.
The resin is designed to reduce Total Hardness to minimise the risk of scale build up in the coffee machine.
Capacity approx 100 litres (depending on Hardness)
This filter should be changed at least every 3-4 months.