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Christoph Lohr

Director of Education & Strategic Projects, LiquiTech

Short-Term Water: A History of Unintended Consequences

Abstract: For decades, plumbing systems have been underappreciated and not analyzed in a holistic manner – and looking at history we can see how misunderstanding plumbing engineering has contributed to waterborne pathogen outbreaks. A number of changes to the plumbing codes and building design methodologies over the last 70 years have been implemented without considering other effects, and have caused issues that can lead to decreasing public health and wellness. Whether reducing water flows causing issues in potable water distribution or sanitary/sewer systems, or disinfection by-products on health, or disinfection incompatibility with various plumbing systems, issues have arisen due to these short-term solutions.

In this presentation, we will:

  • Review some of the history of epidemiological outbreaks (cholera, Cryptosporidium, Legionella, etc.) and material issue outbreaks (e.g. lead issues throughout the U.S.) through a plumbing perspective
  • Identify the issues that the push for low-flow has caused in domestic water systems and some of the proposed solutions, as well as showing calculations for initial model of velocity and flow, and temperature considerations
  • Evaluate drain carry issues inside facilities due to low flow in the sanitary/sewer systems
  • Cover the compatibility of supplemental disinfectant with various piping materials and other disinfection strategies
  • Explain and discuss proper hot water recirculation sizing and strategies

David Yashar Christoph Lohr has over 10 years of experience in designing plumbing systems, predominantly for health care facilities. His current responsibilities as Director of Education and Strategic Projects for LiquiTech is to expand awareness and knowledge and win support from influential stakeholders. Mr. Lohr’s professional activities in the industry extend into multiple volunteer and leadership roles. As Chair of the ASPE Legionella Working Group and Chair of the PIPE Trust of Arizona Safe Water Committee, he is committed to leading the industry in providing drinking water that does not negatively impact public health. He’s passionate about finding efficient ways to proactively limit Legionella outbreaks.