Bests & Worsts Reviews from Amazon

Works with magic and unicorn tears. :o) It is not a filter. It is a water treatment system. The stainless steel head is robust and a nice solid chunk of metal. Easily could withstand brazing/soldering, on the spot, with the cartridge off. The 3/4" NPT inlet and outlet has nearly a clear flow path, so your GPM, will not be reduced. Install a ball or gate valve in front to permit easy cartridge changeouts. The tee must be orientated to the water flow, use the arrow on the side of the tee, for the water to get treated while flowing. There is an elevated tab in the tee with a single hole for directing a small portion of the water down into the center whole of the cartridge. The water slowly dissolves a small amount of food-grade polyphosphate from the beads and, using the venturi effect, the water is then pulled back through the 8 holes in the cartridge perimeter and through the 3 holes in the tee, surrounding the center tab, to mix with the flowing water. Only 2 to 3 ppm is needed to treat for scale. From past uses at a different home, I've gotten about 20,000 gallons out of a cartridge with still some beads rattling in the bottom when replacing the cartridge. I would say that if you used less than 2,000 gallons a month then one cartridge should easily last a year. The cartridge threads are plastic and you can easily cross-thread them if you get in a hurry replacing the cartridge. Just make sure you get the threads started straight and it screws up with no problems. The threads do no provide the seal, it is the o-ring so once hand-tight that is tight enough.