A common method of leak detection is the use o f a leak detecting solution such as a water/soap solution (Figure SP-1-2). Its main advantages are low cost and ease of use. The solution is brushed over the area suspected of leaking. G as coming through the solution will cause bubbles to form. If the leak is very small, several minutes may pass before a bubble will form. Popular commercial leak detection solutions give better, longer-lasting bubbles and more accurate results than plain soapy water. The bubble solution should be removed from the tubing or fittings after checking for leaks as some solutions may corrode the metal.