American Society of Sanitary Engineers publishes product standards of safety for plumbing systems.  There are 5 major standards for mixing hot and cold water.  Four of these standards are mentioned specifically in both the IPC and UPC Plumbing codes as well as the four states that use their own codes (California, Illinois, Wisconsin, and New Jersey).  Commercial building require ASSE certified valves. Click below to understand how and when to use these valves. As always, you may contact a Leonard Sales/Engineering Specialist for assistance.

Building Quality Mixing Valves is what we do at Leonard. At the same time we offer the industries best Service. It starts with the Best Engineers, followed by the most technically knowledgeable Regional Sales Managers, topped off with the industries best Specification Reps.  Our team of experts are easily accessible and have decades of market experience and knowledge on Mixing Valves and Mixing Valve Systems.

Every building is different and all manufacturers of mixing valves pipe recirculation uniquely. We have a video to help explain the basic design of a tempered recirculation system with a Master Mixer. This video will help the plumbing professional select the proper piping method for the job.

Our expert team of sales engineers can help you with all stages of your project — valve design & selection, plumbing & building code and specification assistance.  Some of our professional installs are shown here.

Since delivering our first thermostatic mixing valve over 100 years ago, we have focused exclusively on designing and manufacturing the highest quality water temperature control valves in America. At Leonard Valve Company, craftsmanship isn't a lost art – it's something we do every day.

Our Production Team is committed to manufacturing the finest water temperature control valves in the industry. Today we supply high/low master mixers, complete water tempering systems, emergency mixing valves, and shower valves, along with a myriad of other valve products to meet the stringent demands of today's commercial buildings.