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Home » Publications » Plumbing Engineer

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Plumbing Engineer

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October 2025

Volume: 53
Edition: 10

This month’s issue includes a variety of articles that highlight the latest green building and electrification trends in the plumbing industry. 

  • Articles
  • Columns

Articles

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Feature

Sustainability Flows into Plumbing: Green Building Trends 2025

Learn more about the key innovations that are currently driving the integration of sustainable plumbing practices.
October 1, 2025

From rainwater harvesting to geothermal systems and smart leak detection, John A. Mullen explores how cutting-edge plumbing strategies are reshaping sustainable design in 2025 to meet the challenges of climate change, efficiency, and public health.


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Feature

The Current Debate: Gas vs. Electric Heating in Modern Buildings

Innovative electric heating systems, such as heat pumps and sewage waste energy exchange, can enhance sustainability and efficiency in building design.
October 1, 2025

In their joint article, Anthony Winning and Lhymwell Manalo explore the growing shift from natural gas to electrified systems in modern buildings—highlighting the role of early coordination, heat pump technology, and innovative energy recovery strategies that redefine sustainability and resilience in 21st-century design.


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Feature

Simplifying the Design of Ground Heat Exchangers for Ground Source Heat Pumps, Part 2

Optimizing GHEX design enhances control, reliability and efficiency under all load conditions.
October 1, 2025
Albert Wallace

In Part Two of his deep dive into geothermal design, Albert Wallace explores a modular, patented ground heat exchanger (GHEX) system architecture that balances cost, reliability, and energy efficiency.


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Feature

Q&A with Tom Lentine, Vice President of Holby Valve

Simplicity and durability of its product line and a team of dedicated employees and manufacturers’ reps are key to this organization’s successful business model.
September 29, 2025
Amalia Deligiannis

With rugged simplicity, smart monitoring, and a customer-first ethos, Holby continues to earn trust valve by valve, decade after decade.


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Columns

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Legal Pipeline

The Limits of a Contractual Waiver of Consequential Damages

Direct damages, which naturally result from a breach, are not waived even with an express contractual clause.
October 1, 2025
Steven Nudelman

I represent various industry players in construction contract negotiations and, invariably, at least one party wants a “waiver of consequential damages” clause in the agreement. 


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FPE Corner

Clear the Pipe: A Guide to Fire Sprinkler System Drainage

Coordinating drain locations and discharge points with plumbing engineers and architects ensures water is safely diverted, preventing damage and maintaining system reliability.
October 1, 2025

Proper drainage is a critical yet often overlooked aspect of fire sprinkler and standpipe system design—Eugene Green, PE, explores essential coordination strategies to prevent water damage and ensure fire protection systems operate effectively when needed.


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Code Classroom

Emergency Flushing and Disinfection for Legionella, Part 2

Building owners, operators or water management teams can use a checklist to develop a customized emergency flushing and disinfecting protocol or use it as part of a water management plan.
October 1, 2025
Ron George

With Legionnaires' disease outbreaks on the rise across the U.S., building owners must act fast—this article outlines critical emergency flushing and disinfection steps to stop Legionella bacteria before it spreads.


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