Plumbing & Mechanical Engineer - Articles

The Facts About Jockey Pumps

March 28, 2002

What is a jockey pump and why does it carry that title? This article explains.

Pressure-Assist Technology: How It Works, Where It's Used

October 30, 2001

Over the past 20 years, pressure-assist technology, based on pressure flushing technology, has been used in tank-type toilets in commercial, residential and institutional facilities.

Differential Pressure Bypass Valves: The Key to a Quiet Zoned System

John Siegenthaler, P.E.

August 29, 2001

One benefit of hydronic heating is the relative ease of dividing the distribution system into several independently controlled zones.

Fundamentals of Siphonic Roof Drainage

March 1, 2001

Unlike traditional roof drainage systems, a siphonic system is designed to operate with the piping completely charged with water during a rainstorm.

Outdoor Reset Control--No Quality Hydronic System Should Be Without It

John Siegenthaler, P.E.

February 27, 2001

Outdoor reset control enables heat to flow from heat emitters smoothly, continuously and at the right rate.

John Siegenthaler: Renewable Heating Design

Water-To-Water Heat Pumps

John Siegenthaler, P.E.

September 28, 2000

The ability to function as both a heating and cooling system is the biggest attraction of heat pump systems, especially in mid- to lower latitudes.

The History of Domestic Water Heating

August 29, 2000

A brief look at some older heating methods brings interesting new applications.

Fire Protection Design with FM 200

August 25, 2000

FM 200 is a halocarbon agent accepted as an alternative to halon for total flooding fire suppression systems.

Sizing Water Heaters

August 11, 2000

A water heater is required for supplying potable water for showers, kitchens, bathrooms, washing machines, dishwashers and other purposes in a home or commercial building.