ASHRAE Journal - July 2024 - 19
COLUMN ENGINEER'S NOTEBOOK
We did fi nd a small leak at another building on site
(there was actually a leak at that building's lock up
type pressure regulator!), and we replaced that valve
(Photo 4). For those of you who notice in the picture
that the vault cover says " water, " rather than " gas, "
your eyesight is good. Just FYI, the nearby water vault
said " gas " on it. They are not the same size, so we could
not switch them out. Yet another thing that delayed
fi guring things out. Close examination of this pressure
regulating valve showed it had gotten pretty wet at some
point(s) in the past. We then scheduled the gas company
to come out a week and a half later (because we were
told they were already shorthanded, and then two of
the area guys had the fl u, it took 11 days to get another
inspection ). We passed the pressure test. All has worked
well since.
There is, however, one more note. That last gas
company inspection occurred February 8, the day
after our " Pineapple Express " Southern California rain
deluge, where we got roughly 10 in. (254 mm) of rain
over three days. Other parts of the world may think that
is nothing extreme, but we've had years in Southern
California where that would be an entire year's worth
of rain. Our guys arrived an hour before the inspection
window and checked everything. Our brand new valve at
the second building was completely under water, down
in its little " water " vault. It was not at a low point, but it
was in a sidewalk that had become a water drainage path
during the huge storm. It is clear in hindsight that any
sort of vault will fi ll with water if it is part of the drainage
route for a big storm, but no one had ever checked it.
Now we are putting a drainage line in the bottom of the
vault to a nearby lower area.
Lessons learned (or relearned) include the importance
of shutoff valves and unions in threaded piping; the
ease of causing leaks in old threaded piping and valves
whenever they are disturbed; the risks associated with
having a pressure regulator in an underground vault
that could be fl ooded; and that there is more than one
type of pressure regulator.
As Paul Harvey used to say, " Now you know the rest of
the story.... "
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J U LY 2 0 2 4 ashrae.org ASHRAE JOURNAL
19
http://www.flamcogroup.us
http://www.ashrae.org
ASHRAE Journal - July 2024
Table of Contents for the Digital Edition of ASHRAE Journal - July 2024
Contents
ASHRAE Journal - July 2024 - Intro
ASHRAE Journal - July 2024 - CT1
ASHRAE Journal - July 2024 - CT2
ASHRAE Journal - July 2024 - Cover1
ASHRAE Journal - July 2024 - Cover2
ASHRAE Journal - July 2024 - 1
ASHRAE Journal - July 2024 - Contents
ASHRAE Journal - July 2024 - 3
ASHRAE Journal - July 2024 - 4
ASHRAE Journal - July 2024 - 5
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ASHRAE Journal - July 2024 - Cover3
ASHRAE Journal - July 2024 - Cover4
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