CURRENT ISSUE
October – December 2025
The current issue of Working Pressure is the Fire Protection Issue. This issue includes articles about the benefits of clean agent inert gas fire protection systems, residential fire protection systems, virtual design and construction for fire protection, and more.
View the electronic flip-book edition of the issue by clicking the cover. You may also browse the individual articles below.
Printed editions of Working Pressure are reserved for ASSE International members. If you’d like to receive printed editions, become a member at asse-plumbing.org/membership.
FEATURES
Residential Fire Sprinkler Systems: The Standards, The Science, And The Stakes
Every few years, I’m asked to provide an update on residential fire sprinkler systems. Each time, I hope to report meaningful progress.
Unfortunately, except for...
The Benefits of Clean Agent Inert Gas Fire Protection Systems
Fire protection is a critical concern for businesses, especially in environments where sensitive equipment, data, and materials are present. Traditional fire suppression systems like...
Virtual Design and Construction For Fire Protection
During the past decade, I have been focused on virtual design and construction (VDC), or as I like to refer to it, virtual installation...
REGULARS
Fourth Quarter 2025 Update
As state legislatures wrap up their 2025 sessions, attention is shifting toward implementation of newly enacted laws and preparation for 2026 agendas. Several states...
Backflow Prevention & Fire Protection Quiz
According to the ASSE International Plumbing Dictionary, working pressure is the maximum pressure in a water piping system allowable under normal working conditions. Likewise,...
Ten Questions With … Kevin Convy
In each issue of Working Pressure, we ask 10 questions to a training coordinator or instructor of an ASSE-approved training provider. Some questions are...
ASSE 1118: Criteria for Digital Mixing Valves
In the ever-evolving landscape of plumbing technology, precision and performance are no longer optional; they're essential. As engineered hot water systems grow more sophisticated,...
Plumbers and Sprinkler Fitters
This issue of Working Pressure is our Fire Protection issue. It is very apparent how the trades of plumbing and fire protection coincide. Plumbers...
Fire Protection: Water is the Hazard?
When we look at the required cross-connection protection, it is important to understand the system type, piping material, water supply to the system, and...
Evolving Industry Needs
As 2025 draws to a close, the ASSE International Professional Certifications department continues to make significant strides in strengthening certification programs and aligning with...
Introducing the 2025-2026 ASSE International Board Of Directors
On Friday, September 19, at the 2025 ASSE International Annual Meeting in Palm Springs, CA, the 2025-2026 ASSE International Board of Directors were elected...
Try to Detect It
Mike Cessario came of age in the early 2000s in West Philadelphia’s politically charged punk rock scene. Many followers of the genre at that...
1” Wilkins Model 720A
QUESTION:I am servicing a 1” Wilkins Model 720A. Can you give me any helpful hints on how to repair this assembly?
DOUG:The Wilkins 720A is...
Digital Mixing Valve Test Methods
Digital mixing valves (DMVs) are rapidly becoming essential components in engineered hot water recirculating systems due to their ability to maintain precise temperature control...