UL examined and tested sprinklers sampled from field installations in accordance with the recommendations and requirements of applicable National Fire Protection Association (NFPA) standards for several decades.Ï

Usually, I’m suggesting to readers that they need to change. Now it seems I have to change. 

This is a continuation of a summary of the significant code changes to the 2021 Uniform Plumbing Code (UPC) which is developed and promoted by the International Association of Plumbing and Mechanical Officials.