I use many years pass filter for our drinking water supply in the dwelling. In the past I had unfortunately deliver throughput filters from other providers which no replacement filters. That's why I switched to this new filter for the PUR water filter system. I use the filter to be about 6 months and am very content. However, I draw from Sterm because the flow rate is very slow by the filter, in other words in my install about 10 seconds for 1 liter of water.