Originally Posted By: phinsperger
This post was automatically imported from our archived forum.
Here is my best guess based on the information provided.
You said that the main was changed to copper, is the rest of the distribution piping galv. ? If so the yellow water is probably from iron rust from inside the pipe. If you are like most people, the outside tap is probably used far less that the inside taps. The water in the outside tap would be sitting in the pipe for a longer period of time and have a chance to accumulate more iron rust to the point where it becomes visible. The inside taps probably also contain iron rust but due to frequency of use, do not have enough to become visible.
As for it taking longer, my best guess is that often when water is shut off and drained to perform work on a system that contains galvanized pipe, when the water is turned back on it often dislodges some of the larger rust particles. This often shows up in the screens at the faucets. There may be one or more of these fragments that dislodged and got hungup somewhere in the line for the outside tap. This would restrict your water flow. Your water pressure would not be affected. Less water flow equals longer time for the water in the line to flush clean.
Hinsperger Inspection Services
Chairman - NACHI Awards Committee
Place your Award Nominations