Not just promotion: Valuable insights into materials, corrosion, wear and tear on UV chambers in swimming pool plant rooms. 21 minutes and 17 seconds worthwhile:

Our Duncan Ockendon explains why stainless steel is not immune from corrosion and shows various types of corrosion encountered on stainless steel UV chambers in swimming pool plant rooms.  High chloride content in the pool water is a particular risk.  He demonstrates the versatile use of HDPE as an alternative material, both for UV chambers and filter housings.

Full video: