i connect it between two hoses but you could rig it to run right from the wall if you wanted but I do not use it unless i am washing the car. that is why i used quick connects so when my wife waters the plants etc she can connect the water hoses toghther without changing anything and then i can just connect the filter between the two when I wash. quick and easy cost is dependent on which filter you buy. this one cost me about 50 to make.
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