To do the test, you simply hook up the hose to a boiler drain (like at your washing machine). YOU NEED TO USE TREATED WATER. You will need a white bucket to complete the test. Run the water at about 1 GPM. You can judge by how fast you fill the bucket. Let the water continue running at about 1 GPM and see how long it takes to plug the filter (maybe it will not plug). Hopefully, it will take several hours to plug the filter, but this is a “baby filter” – the full-sized filters will take a whole lot longer to plug.
