https://www.pmmag.com/rss/6593-letters-to-the-editor en-us Plumbing & Mechanical's letters to the editor for December 2020!]]> http://www.pmmag.com/articles/103238 Fri, 04 Dec 2020 00:00:00 -0500 https://www.pmmag.com/articles/103238-letters-to-the-editor-december-2020 Plumbing & Mechanical's letters to the editor for September 2020!]]> http://www.pmmag.com/articles/103069 Thu, 03 Sep 2020 00:00:00 -0400 https://www.pmmag.com/articles/103069-letters-to-the-editor-september-2020