Little did the author of Catch-22 know, when the novel was published in 1961, that the title would live on as a motto to mutually conflicting conditions. 

Domestic hot water recirculation (DHWR) systems are designed to conveniently provide a hot water supply at every fixture in all units of a building. 

Hot water has been around since man first harnessed the power of fire, but when at elevated temperatures, it is dangerous and even deadly.

A safe domestic hot water system relies upon a good design, including piping layout and selection and placement of equipment.

Plumbing engineers will need to shift from central temperature control applications to point-of-use control.