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Home » Topics » Plumbing & Mechanical Engineer

Plumbing & Mechanical Engineer
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Air source heat pumps installed outside of city house, green renewable energy concept of heat pump.
Renewable Heating Design | John Siegenthaler

3-way diverter valves: Part 1

Digging into motorized 3-way diverter valves and actuator options.
John Siegenthaler, P.E.
John Siegenthaler, P.E.
May 1, 2024

There are many scenarios in which flow at some location within a hydronic system has to be directed along one of two possible flow paths. When a single valve is used to create this routing, it’s called a diverter valve. In part 1, we're digging into motorized 3-way diverter valves and actuator options.


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Chicago Faucet feature image of a classroom with students raising their hands.

The ABCs of anti-scald with Chicago Faucets

Michigan school installs anti-scald faucets to promote safety within its student body.
Greg Hunt
April 17, 2024

NorthPointe Christian Schools near Grand Rapids, Michigan, has grown from 90 students to over 1,250 across Pre-K to 12th grade. To keep pace with the needs of ever-expanding schools like Northpointe, Chicago Faucets has evolved to meet school safety needs with products like thermostatic mixers and touchless faucets.


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An interior view of a fuel cell in a mission critical application.

Leveraging microgrids and alternative energy sources to support mission-critical applications

The intermittency of alternative energy creates challenges for always-on applications.
Nicole Krawcke head shot 2024
Nicole Krawcke
April 15, 2024

Learn how microgrids, battery energy storage systems (BESS) and fuel cells can work together to enable mission-critical facilities to have an independent power source.


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PME April 2024 Lowell Manalo column feature image of horizontal and vertical piping design.
Plumbing Essentials — Design Approaches, Codes and Everything in Between | Lowell Manalo

Building type is a key factor in the decision-making process

Vertical or horizontal piping distribution?
Lowell Manalo headshot
Lowell Manalo
April 8, 2024

Plumbing systems in buildings require careful selection of vertical or horizontal piping distribution. The building type is a key factor in this decision, and relevant codes and standards must be followed.


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Hand puts thermostat of electric water heater (boiler) in economy mode.
Plumbing Talking Points | David Dexter

Identifying back-feed potentials within domestic hot water risers

Service/isolation valves are a necessity.
David Dexter headshot
David Dexter
April 4, 2024

The author reflects on a recent trip to South America and Antarctica and discusses the topic of identifying back-feed potentials within domestic hot water risers, drawing from an article by Miles Ryan, PE, about typical issues found in high-rise residential buildings.


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Misty Guard column feature image of industry acronyms
Guard on Compliance | Misty Guard

Code Council proposals for Group A code modifications

A deeper look into the propsals being discussed the most.
Misty Guard headshot
Misty Guard
April 2, 2024

While exploring International Code Council's first report of proposals for modifications to the Group A Codes, I became curious about which codes are being discussed the most. I decided to take a deeper look and get answers to three questions.


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Armstrong Fluid Technology's David Lee pictured alongside smart pump system.

Flowing forward: commercial pumps embrace sustainability for a greener future

Smart pump technology provides greater energy savings opportunities.
Nicole Krawcke head shot 2024
Nicole Krawcke
April 1, 2024

With the world's focus on sustainability growing, plumbing engineers play a crucial role in adopting eco-friendly solutions. A major trend in commercial pump technology is the drive for efficiency and energy conservation. Find out how manufacturers are addressing environmental concerns and high energy costs.


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April Dave Yates column feature image: Providing gas boiler repair services at home is responsibility of a qualified engineer
Contractor's Corner | Dave Yates

Reap the benefits of heat pump technology

Belts and suspenders
Dave Yates
Dave Yates
March 28, 2024

There was a time when furnaces and boilers shared equal flexibility in Btu/h input/output and air delivery. It's hard to imagine, right? But times are changing. Will you embrace this change for profit, or cling to old ways as sales slip away?



Read More
April  John Siegenthaler column feature image of Boiler System With Heat Pump in cellar
Renewable Heating Design | John Siegenthaler

Modern hydronics technology can play well with future energy markets — Part 2

John Siegenthaler, P.E.
John Siegenthaler, P.E.
March 27, 2024

Last month, we discussed how solid thermal energy storage, combined with an air-to-water heat pump and an electric boiler, provides a platform to leverage time-of-use electrical rates in ways that can benefit customers as well as the utility providing the electricity.


Read More
Worker installing a high-efficiency fixture and fitting

State of the PVF industry roundtable

Industry stakeholders discuss trends and technology.
Nicole Krawcke head shot 2024
Nicole Krawcke
March 20, 2024

PM Engineer Chief Editor Nicole Krawcke had the chance to speak with several key industry stakeholders about trends and technological developments in the market, including: Greg Nahrgang, vice president, technical services and product development, Charlotte Pipe and Foundry; Adam Botts, product manager for Viega; and Steven Dolejsi, applications engineering manager, IPEX.


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AI can boost efficiency and profitability for plumbing, HVAC contractors

AI can boost efficiency and profitability for plumbing, HVAC contractors

IPEX celebrates grand opening of new Florida distribution center

IPEX celebrates grand opening of new Florida distribution center

Radiant & Hydronics All-Stars Roundtable 2025

Radiant & Hydronics All-Stars Roundtable 2025

Radiant All Stars Roundtable discusses low-temperature systems, and more

Radiant All Stars Roundtable discusses low-temperature systems, and more

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Right & wrong: Examining common design pitfalls, and how to optimize piping strategies

Oct. 22 PM ENR Webinar: Optimizing Healthcare Piping: Why Schedule 80 CPVC is a Smarter, Safer Choice

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November 13, 2024

Future Proofing MEP: Navigating the 2026 High Efficiency Water Heating Standards

Join our deep dive into DOE’s new standards so you can future-proof your MEP practice.

EARN: 0.1 ASPE CEU; 1 AIA LU/HSW; 0.1 IACET CEU*; 1 PDH

October 22, 2025

Optimizing Healthcare Piping: Why Schedule 80 CPVC is a Smarter, Safer Choice

This webinar will examine the critical advantages of CPVC compared to metal and other plastics, including its resistance to harsh disinfection chemicals, ease of installation, and plenum-rated fire safety.

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  • NEWS
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  • CONTRACTORS
    • BATH & KITCHEN PRO
    • BUSINESS MANAGEMENT
    • HIGH EFFICIENCY HOMES
    • TECHNOLOGY
    • WATER TREATMENT
    • PMC COLUMNS
      • Dave Yates: Contractor’s Corner
      • John Siegenthaler: Hydronics Workshop
      • Kenny Chapman: The Blue Collar Coach
      • Matt Michel: Service Plumbing Pros
      • Scott Secor: Heating Perceptions
  • ENGINEERS
    • CONTINUING EDUCATION
    • DECARBONIZATION | ELECTRIFICATION
    • FIRE PROTECTION
    • GEOTHERMAL | SOLAR THERMAL
    • PIPING | PLUMBING | PVF
    • PME COLUMNS
      • Christoph Lohr: Strategic Plumbing Insights
      • David Dexter: Plumbing Talking Points
      • James Dipping: Engineer Viewpoints
      • John Seigenthaler: Renewable Heating Design
      • Lowell Manalo: Plumbing Essentials
      • Misty Guard: Guard on Compliance
  • RADIANT & HYDRONICS
    • RADIANT COMFORT REPORT
    • THE GLITCH & THE FIX
  • INSIGHTS
    • CODES
    • GREEN PLUMBING & MECHANICAL
    • PROJECT PROFILES
    • COLUMNS
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      • Natalie Forster: Editorial Opinion
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