Occasionally we are asked by our clients to install stainless steel risers. The criteria for where we install this is usually down to the client’s preference, but you will more likely find stainless steel risers in coastal towns due to the high atmospheric salt content.
This type of air is extremely damaging to most metals, particularly the ones we use most of the time for normal riser installations.
Stainless steel risers are used due to their chromium content which is rust resistant.
If stainless steel is not installed for risers on coastal towns, then steel risers would be coated with paint to the specification GIS/PA/10