hi gene
leaks or curiosity?
from an rv/safety perspective the issue IS
leaks...
soapy water or one of the electronically based lp gas LEAK detectors can be used, or the hydrogen sulfide detectors...
some of the models even provide a ppm reading...
fancy gas detectors... is but one of the many sites selling these.
i've seen some hardware stores that RENT detectors too.
__________________
now on the
curiosity side...
it's mercapt
An which is more correctly named methanethiol
and is one of many thiol compounds that occur naturally...
Thiols
besides it's use as a tag for natural gas or liquid petroleum, there are LOTS of other potential sources in/around the rv...
normal foods (nuts/cheese) and asparagus (my favorite veggie) along with many plastics give of thiols...
we covered screw driver handles producing 'vinegar' like odors in other threads...
well some plastic containers give off thiol odors too.
also skunks, decaying organic matter, animal poo, and so on....
human breath (the bad sort) also gives off thiol odors...
sometimes these breath odors are benign; related to foods, meds or hygiene...
and other times they represent more serious health issues like gi infections or malignancy (esophagus, stomach, bowel cancers)...
i've seen several folks with serious health issues like these, and the only/early symptom was obnoxious odor noted by them or a spouse.
the 'smell' of thiols can linger from minutes to days, depending on source and nearby absorption...
for example ALUMINUM binds some of the compounds, so aluminum lp tanks that are EMPTY may still smell of mercaptan days or weeks later.
and these lingering traces don't mean there is a LEAK in the system.
mercaptan is often referred to as a "harmless odor" but this is ONLY TRUE in very small concentrations...
most of the chemicals in this class are 'lighter than air' so they rise and dissipate into the atmosphere...
and are broken down by sunlight, ozone in just a few hours.
wanna read more?
Methyl Mercaptan health details
http://www.vngas.com/pdf/g239.pdf
Methanethiol...
so back to
RV RELEVANCE...
just because YOU or the mate SMELL it doesn't mean there is an lp gas leak in the trailer system...
i agree regular inspections, using soapy water or a detector is important...
but would NOT support the idea of routinely just 'tightening' the lpgas fittings based on a NOSE
IF no leaks are found using OBJECTIVE tools, snugging the fittings only increases the likelihood of BREAKING a pipe or fitting.
the NOSE APPROACH is a sensitive but unreliable tool and just because we smell these sulfur compounds doesn't mean lpgas is leaking...
and given the altitude at which u live/play all of your gas applicance may need 'adjustments' for this factor.
cheers
2air'