Welcome to the commercial side of Merlo Plumbing. We've been working on large scale projects in the Greater St. Louis Area for many years. Experience on a wide variety of commercial and industrial-sized projects gives us the edge we need to deliver quality work on time and within budget. If you are interested in some of our major projects, take a look at our Portfolio. Dropping off CAD drawings or plans? Enter our Plan Room or drop them off at design@merloplumbing.com. As always, we're available from 8 a.m. to 5 p.m. CST weekdays, so feel free to give us a call at 314.843.1000.