Minimum necessities are generally at the end of Each and every branch in piping, just in advance of each h2o closet, at the base of every vertical stack and within and outdoors the making in the main drain or sewer. Clean up-outs usually have screw-on caps or screw-in plugs. They http://valves-and-fittings23456.ezblogz.com/16968001/5-easy-facts-about-valves-and-fittings-described