Over the past few weeks I have been working for a plumber friend. He has moved his business to focus on back flow installation and testing. Now after an out break of legionnaires disease that occurred in a chiller in an apartment building that was cross conected to the domestic water, the NY heath dept. is cracking down on all the commercial buildings that don't have RPZ's. We recently did an install on a restaurant. we put in two new meters, 1 RPZ for the toilets and wash sinks, 1 RPZ for the fancy Tensui water filter, and 1 rpz for the irrigation. It has been a good experience working with him and learning all the rules on how to install the assemblies to code.