This compact cast level with our Patented Plumb Site vial accomplishes what a standard 2 vial torpedo level our 1-vial works in both planes. Need to make sure your perpendicular pipes are square the 2 V-groove read surfaces on this tool allows the tool sit securely on many round surfaces and giving you a hand free to adjust the pipes. Metal pipes no worries the powerful rare earth magnet inside each V-groove will create a secure hold you probably will have both hands free. The solid cast body will give you a long lasting tool.