There are more dangerous trades — firefighting and coal mining come to mind — but plumbing presents a long list of potential hazards.

We went back through the online archives and tallied up the Top 20 RJ Plumbing Products of 2015.

The proliferation of advanced energy-efficient products is transforming the plumbing and HVAC space. It marks an unprecedented turning point for contractors in the form of opportunities as well as challenges. Those who adapt and reinvent themselves for this paradigm shift will emerge as winners.

Plumbing contractors with the right knowledge can fill a need for consumers concerned about the quality of their drinking water.

The tests and certifications behind high-efficiency toilets.

How epoxy-coated pipe-lining technology helps prevent water contamination issues.

New executive vice president of the Plumbing-Heating-Cooling Contractors — National Association wants to crowdsource priorities for education, advocacy and programs.

How this Texas plumber is changing the perception of the plumbing industry — one student at a time.

Quiet systems and grinding technology continue to be important to residential consumers.

The code now has solar, hydronic and geothermal provisions.