If you fail the exam twice, you must pay the exam fee again in order to retake the exam. Its industry-leading research helps VELUX Skylights make smart business decisions. Part of the trick in plumbing is to avoid scratching fragile chrome or brushed nickel finishes on faucets or exposed drain parts. Plumbers use smooth-faced pliers and wrenches to achieve perfect results. You can avoid buying special tools for one-time use by wrapping your soft-leather work glove around the fitting and using your standard pliers or pipe wrench over the protective cover. It also comes with a long list of things …