The American Society of Sanitary Engineering’s (ASSE) 1070 Standard, Performance Requirements for Water Temperature Limiting Devices is an industry standard for a point-of-use or in-line temperature-actuated mixing valve with a maximum temperature limit feature.

In Part 1, published in this magazine’s February 2022 issue, we talked about why buildings lean, how this phenomenon affects plumbing systems and drain lines, and how low-flow fixtures compound this problem.

In nearly every building in America, tub-shower valves with integral maximum-temperature limit stops, field-adjusted to limit the maximum setting of the valve to 120 F, are code-required.

With modern buildings, leaning just a little amount can affect the flow of waste in sloping drains. Settling drains can create shear stresses and rupture pipe penetrating foundation walls; they also can cause pipe to lose slope or experience reverse slopes.

This month, I’ll be catching you up on the code activities over the last few months.

Last month, I started telling the story of how I got involved in plumbing design and how it was a matter of plumbing design choosing me. This is a continuation of that story.

I have been writing for this magazine since 1994 and I have never visited their offices. On this trip, I was able to meet the new editor, Amalia Deligiannis. 

The international codes — plumbing, mechanical, fuel gas, building, residential and property maintenance — each contains, in the beginning, administrative provisions.

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

This is a continuation of a summary of the significant code changes to the 2021 Uniform Plumbing Code (UPC) which is developed and promoted by the International Association of Plumbing and Mechanical Officials.