Archive for the ‘AWWA’ Category

Water Efficiency – Bridging the Infrastructure Gap

Tuesday, August 25th, 2009

Below are the highlights from the article from Water Efficiency Magazine (July-August 2009).

Jimmy Carter, Senior Director of Field Services of American Leak Detection, was interviewed for the article linked above, and we had the chance to ask Jimmy about certain quotes from the article to provide more insight on the state of the infrastructure.

- nation’s water infrastructure system 2009 grade of D-.

Jimmy Carter: “Due to our water system’s age coupled with supply and demand issues, our water infrastructure is in desperate need of repair. Typical systems lose as little as 4-5% while some systems reach as high as 40 to 60% of unaccountable water that could be due to leaks, theft or non-metered usage.  Loss not only means waste, but also the expense of treatment and lost revenue.

Homeowners hate to see their water bills go up, but may not understand the bigger picture from the water district side. The cost for treating the water, upgrading infrastructure by replacing old lines, keeping the supply for new construction of new potable and non-potable systems, increasing production at their treatment plants, and dealing with issues such as the smelt belt in our California aqueduct systems are just some of the many issues water districts must face that would impact customers.

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AWWA ACE 2009 Pipe Tapping Results

Wednesday, June 24th, 2009

The AWWA National Tapping Contest is a competition of skill in which water operators from across the US work against the clock to open a cement-lined, ductile iron pipe and install a tap. The contests begin at the local AWWA Section level and the winners are then eligible to compete in the national Tapping Contest. There are two divisions, Men’s and Women’s.

Learn more about the Pipe Tapping Contest.

Congratulations to the 2009 Tapping Team Champions

Men’s Final Champions

Tacoma Water Tapping Team: 1:13:38

Women’s Final Champions

Alamo City Tappers: 2:00:88

Check out the Pipe Tapping hall of Fame to view the past winners of the Pipe Tapping Contest.

View the past Pipe Tapping videos

Pipe Tapping Videos

What’s the best way to tap a water main?

Wednesday, June 24th, 2009

Pat Kline of Opflow has written a thorough article answering the question posed as the title of this blog posting. The article was published in Opflow‘s, May 2009 edition.

Below is a brief preview of the article.

QUESTION: I’ve seen many methods for connecting service lines to mains or laterals. Is there a rule of thumb to help me determine what to do in a given situation?

ANSWER: The method you choose to connect a service line to a main or lateral will affect whether you’ve made a tight, reliable connection that will give your customer years of satisfactory service. Let’s look at the factors involved one by one.

First, are you making the connection while the water main or lateral is left on or turned off? Dry taps, as they’re called when the main is shut down, are usually performed during main installation or other repairs. Dry taps are generally T-connections installed in the main or lateral. Wet taps, or hot taps, which use sleeves or saddles, are performed when the main or lateral is under pressure. It may seem as though dry taps would be the method of choice, but shutting the main down can cause water loss, increased potential for contamination, and lack-of-water or dirty-water complaints. Utilities perform wet taps most frequently, so that’s what we’ll talk about.

The article is broken down into the following sections. I will paraphrase each section.

A Valve By Any Other Name

There are different names for valves, but the end that connects to the main is the inlet, and the end that connects to the service line is the outlet.
Read the full article.

The Art of Tapping

  • The tapping tool is specific to the water main material.
  • Ensure the valve stop threads match those of the tap.
  • Use gaskets between the tapping machine and the saddle, and between the saddle and the pipe.
  • Keep the outside of the pipe and the tapping drill disinfected and clean while tapping.
  • Tap at 45 degrees in relation to the centerline of the pipe.

Read the full article.

Turn, Turn, Turn,

Learn about the terminology involved in the details of pipe tapping.

  • Thread pitch
  • Major diameter | Minor diameter
  • Pitch diameter
  • Engagement
  • Effective thread
    • The full article provides the measurements, and formulas you need to help you tackle that pipe that needs a hot tapping.

      Read the full article.