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Current Issue

Updated for May on 05/08/2012

A Checklist for ANSI Compliance: Are You Ready for ...

Workplace safety has seen great improvements over the past several decades, due at least in part to regulatory pressures that define acceptable limits for risks and establish safeguards and emergency ... >> More

Don’t Get Trapped in Improper Grease Interceptor Design

What do you need to know about grease interceptor design? You just fabricate a tank, big or small, with some interior features to prevent direct inlet-to-outlet flow and install it underground outside a ... >> More

Accommodating Piping Movement Generated by Seismic ...

Piping systems in earthquake-prone areas are exposed to forces and movements beyond normal operating conditions. Seismic forces can cause extensive damage when piping systems are not ... >> More

Hot water heaters and reverse return piping

I can always tell from the questions I get from our guys in the field when there is an issue that is poorly understood and improperly or insufficiently expressed or detailed on project construction documents. ... >> More

PVC flue pipe failure

In the May 2011 issue of this magazine, I wrote a column titled, “Is PVC an acceptable vent material for flue gases?” in which I pointed out many problems and challenges associated with venting flue gases ... >> More

Energy-efficient plumbing technologies of the future

Some energy-efficient technologies are the holy grail of the plumbing industry. These technologies would allow a building to be a comfortable, safe place to live or work while using only the energy it ... >> More

Who’s in control?

During a recent review of a fire sprinkler design (contract docs, not shop drawings), it was déjà vu all over again. After decades of trying to help engineers get it right, I still find myself making the same ...  >> More

A young designer’s guide to writing design meeting minutes

This column will mean more to young plumbing designers than to us old timers. However, old timers may get something out of it too, and may even learn something new. During every design project, ...  >> More

Making sense of thermistor sensors

A thermistor sensor is an electrical resistor that changes resistance with temperature. In the most common types, the resistance (measured in Ohms) becomes lower at higher temperatures. ... >> More