The other day I found a section of old chrome plumbing pipe in full bloom under a homes bathroom sink. It really was a pretty sight to behold. The blooms were bluish green and were caused by corrosion of the pipe and chemicals that had been used to "clean" the drains.
This is fairly common with metal drain lines, traps, etc. What is uncommon is that you seldom find a pipe like this in full bloom! Most of the time when they get to this stage of bloom they are leaking like a sieve and the section has been replaced.
So if you have metal drain pipes take a look and see if you have a bumper crop of blooms. If you find a pipe that has even the smallest amount of corrosion or discoloration, go ahead and replace that section of pipe. The damage starts from the inside of the pipe and it might not be leaking now but it will be soon, it is only a matter of time.
Oh, and a word to the wise! Do not pick the blooms! If you do you will need a bucket to catch the water that will flow from the vase that was holding that pretty flower!!
Scott Patterson has been a professional home inspector since 1995 and works out of the Greater Nashville TN area. You can contact him at his office 615-302-1113 or on his cell at 615-870-4162 via text or voice.