blazenut Posted October 19, 2009 Report Share Posted October 19, 2009 As for home inspections, which gas detectors do you guys carry? Quote Link to comment Share on other sites More sharing options...
Brad Manor Posted October 19, 2009 Report Share Posted October 19, 2009 I used to carry an Ultra-Trac 3000 - when it came due for calibration I elected to stop using it. Now if I smell gas I tell the homeowner and make a note in the report. I tell everyone to buy new CO detectors when they move into the house. -Brad Quote Link to comment Share on other sites More sharing options...
Scottpat Posted October 19, 2009 Report Share Posted October 19, 2009 As for home inspections, which gas detectors do you guys carry? When I first started back in 1994 I felt that I needed to have a gas detector. I think I used it a dozen or so times, they tend to have many false positive alarms. I just don't see the need for one. My nose can smell pretty darn good and if I get a whiff of natural gas, I keep sniffing. I do use a liquid leak detector if the need arises. As for a CO detector; I have one and again I think it has been used a dozen or so times. If I do use a CO detector it will be for my own information and it will never make it in my report that I used one. CO is a funny gas that can appear and then disappear depending on the prevailing conditions. I don't think I would recommend getting either tester. I just don't see the need for them. Quote Link to comment Share on other sites More sharing options...
blazenut Posted October 19, 2009 Author Report Share Posted October 19, 2009 i dont really see the need either, but my boss does... Thats why it smells! Quote Link to comment Share on other sites More sharing options...
Bain Posted October 19, 2009 Report Share Posted October 19, 2009 I bought a Monoxor II twelve years ago when I started out, but seldom use it anymore. I did pull it out last week while in the basement of an old house. The flue pipe of a 30-year-old furnace was shoved about three inches into an unlined chimney and the draft wasn't pulling much of my lighter flame into the flue. As we know, those old chimneys have a tendency to implode, so I turned on the Monoxor II to make certain I wouldn't assume room temperature while mucking around among the spider webs. For me, having a CO detector is more about self preservation than anything else. But I'll probably never buy another one. Quote Link to comment Share on other sites More sharing options...
Bill Kibbel Posted October 20, 2009 Report Share Posted October 20, 2009 I use gas monitors/analyzers and a CO analyzer, but not for each inspection. I use them mostly for when it's necessary to illustrate a point I'm trying to make or document something (notice I don't use "detectors"). When finding a gas leak, around here it's necessary to identify the location, as no one authorized to fix the leaks can find them. I also use a multi-gas monitor for certain commercial building inspections. I use equipment from AIM Products, Bacharach and BW Technologies. There's definitely training needed if using analyzers. Quote Link to comment Share on other sites More sharing options...
Bain Posted October 20, 2009 Report Share Posted October 20, 2009 When finding a gas leak, around here it's necessary to identify the location, as no one authorized to fix the leaks can find them. I have a $300.00 refrigerant-leak detector that is worthless for that precise reason. Quote Link to comment Share on other sites More sharing options...
Plumber26 Posted November 5, 2010 Report Share Posted November 5, 2010 I have a Ridgid Gas Sniffer and I have to disagree with the "there's no need to use it" idea. Since purchased about 1 1/2 years ago I have located at least 30-40 gas leaks at different customers' homes and some houses have found multiple leaks. Even found very tiny leaks that were hard to find even with bubbles. Leaks on the gas meter that were on the gas company's side, leaks on propane tanks from improperly installed tank connections. A gas leak, aside from being a potential danger, also cost money. Don't always rely on your nose to smell it. Quote Link to comment Share on other sites More sharing options...
Jim Katen Posted November 5, 2010 Report Share Posted November 5, 2010 I have a Ridgid Gas Sniffer and I have to disagree with the "there's no need to use it" idea. Since purchased about 1 1/2 years ago I have located at least 30-40 gas leaks at different customers' homes and some houses have found multiple leaks. Even found very tiny leaks that were hard to find even with bubbles. Leaks on the gas meter that were on the gas company's side, leaks on propane tanks from improperly installed tank connections. A gas leak, aside from being a potential danger, also cost money. Don't always rely on your nose to smell it. Well, sure. If I dragged out the Tif, I guarantee that I can find at least one gas leak in every single house that I inspect. (Well, ok, only those houses that have gas service.) There are leaks in every house that has gas appliances. I learned early on that it's just silly to go chasing after them all. Nowadays, I only chase those that I can smell. The tiny leaks that can't be found with bubbles might not even be leaks. You are aware of all of the things that your sniffer will react to, right? If there're aren't bubbles, I have a hard time believing that the gas leak (if it actually is one) is worth fixing. It certainly doesn't pose a hazard and the amount of money that's wasted is really, really, tiny. - Jim Katen, Oregon Quote Link to comment Share on other sites More sharing options...
kurt Posted November 5, 2010 Report Share Posted November 5, 2010 I'm with Katen. I used my Tiff on thousands of houses before finally realizing it was not worth the effort. There are some gas control valves that the mfg's. know leak minute amounts of gas. Years ago, in a fire science class, we were placed in a closed room where the same amount of stink that would be found in a natural gas LEL was injected into the room. It was so strong it made my eyes water. Point being, they load the stink into the gas so if there's even a teeny tiny leak, you'll smell it. Noses work pretty good. I used to think that was heresy, now I don't. I use the Tiff only for making a point nowadays. Quote Link to comment Share on other sites More sharing options...
Nolan Kienitz Posted November 5, 2010 Report Share Posted November 5, 2010 I'm with Katen. Noses work pretty good. I used to think that was heresy, now I don't. I use the Tiff only for making a point nowadays. I'm in the same class. Nose first ... follow up with Tiff to emphasize and (as KM said) make a point. Quote Link to comment Share on other sites More sharing options...
Plumber26 Posted November 5, 2010 Report Share Posted November 5, 2010 The tiny leaks that can't be found with bubbles might not even be leaks. You are aware of all of the things that your sniffer will react to, right? If there're aren't bubbles, I have a hard time believing that the gas leak (if it actually is one) is worth fixing. It certainly doesn't pose a hazard and the amount of money that's wasted is really, really, tiny. - Jim Katen, Oregon Yes, I am aware and have indeed gotten "false readings" here and there but I do not solely rely on the sniffer to detect a leak. I do verify leak with bubbles. Perfect example: I went out to a customer's house for an "issue" with gas water heater. Arrived at the call to find the knob on the gas valve melted. During my questioning of the customer, realized that the husband (we'll call him Mr. Fix-it) had went to the local hardware store and bought a new thermocouple b/c of a constant pilot outage. this was one full month before this "issue". I was able to get the pilot relit only to find that the pilot tube connection to gas valve was barely tighter than hand tight. This was a small leak but a leak none the less. His response, "I thought I smelled a little gas but I thought it was just when it first fired up. Luckily they were home when this occured or they would have came back to a stack of charred wood. Just sayin'. Quote Link to comment Share on other sites More sharing options...
Brandon Whitmore Posted January 22, 2015 Report Share Posted January 22, 2015 I can start to smell a natural gas leak when there's a leak of appx. 250ppm at the source (based on my small tipped wand I use), and I'm not a woman. Usually, I can smell the gas odor when there are free air readings of 0-20 ppm. The LEL of natural gas is around 50,000ppm. Most people start to scramble and evacuate their home when free air readings are very minute (usually less than 100ppm free air). Your nose is the best instrument, followed by a good spray bottle with the proper mixture of soap and water (seam solution) Quote Link to comment Share on other sites More sharing options...
Eric B Posted January 22, 2015 Report Share Posted January 22, 2015 Strange how at lot of the stuff we were told we needed when we started out has turned out to be a bunch of hooey. I'm on my third gas detector and it hasn't proven to be very reliable and it's likely I won't be replacing it. One of the more dependable methods of detecting odors is listening to the client's wife. When they say they smell something it's time to stop and investigate. Quote Link to comment Share on other sites More sharing options...
allseason Posted January 22, 2015 Report Share Posted January 22, 2015 I keep a TIF at the bottom of my tool bag, the state of NJ requires such. I should check the batteries. If it smells...., you know the rest. Quote Link to comment Share on other sites More sharing options...
Chad Fabry Posted January 22, 2015 Report Share Posted January 22, 2015 I call Phillip Smith. If he smells it, it goes in the report. 1 Quote Link to comment Share on other sites More sharing options...
montana Posted March 1, 2016 Report Share Posted March 1, 2016 Originally posted by Plumber26 I have a Ridgid Gas Sniffer and I have to disagree with the "there's no need to use it" idea. Since purchased about 1 1/2 years ago I have located at least 30-40 gas leaks at different customers' homes and some houses have found multiple leaks. Even found very tiny leaks that were hard to find even with bubbles. Leaks on the gas meter that were on the gas company's side, leaks on propane tanks from improperly installed tank connections. A gas leak, aside from being a potential danger, also cost money. Don't always rely on your nose to smell it. I would be careful about testing and reporting on leaks at gas meters and propane regulators. These have a vent that is designed to release gas at certain excess pressures. You will often detect gas "leaks" that are part of the normal function of the regulator; this seems especially true for propane tanks and regulators. (which is why there are clearance requirements between gas meters, regulators, tanks, and potential ignition sources like air conditioners and electrical panels). Quote Link to comment Share on other sites More sharing options...
Hearthman Posted March 28, 2016 Report Share Posted March 28, 2016 At 4.4% by volume the LEL of methane would be 44,000 ppm. Most housewives I've encountered on complaints of a "gas leak" could smell the odorant at levels around 5+ ppm. Add to that around 15% of the population is not sensitive to the odorants used and you see that smell is not a reliable leak detector. Moreover, certain odorants are susceptible to "odor fade" such as from rusty pipes or damp clay soils. That''s why there are over a dozen odorants in common use and not just the mercaptans. You need to know the detection level of your gas sniffer. Those old TIFF 8800a's are sensitive to methane only down to 500 ppm. Sniffers sensitive to 10-20ppm are now common and very affordable. Note these are not gas specific so you will get false positives from all sorts of hydrocarbons such as thread cutting oils, pipe dope, many leak detection fluids, and even formaldehyde from damp fiberglass insulation. Use only non-corrosive soap bubble test solutions. Soaps that have chloride ions in them can cause stress cracking of the base metal. I recommend using only commercially prepared solutions that are known non-corrosive and documented detection properties. Note that highly viscous solutions work better on higher leak rates while the thin viscosity solutions can detect more minute leaks . The official action level requiring evacuation and constitutes a recordable event is 20% of the LEL. There is a phenomenon know as "trace gas leakage". The ANSI Z21.78 std. allow for a max. of 200 cc/hr. of gas leakage through the seals of a combination gas valve and 235 cc/hr. through the main operator at 3/4 psi. All gas regulators require a vent to adjust the pressure against atmospheric pressure. Whenever the pressure fluctuates in a piping system, a momentary 'burp' of gas might be detected at the vent screen. A sustained significant leak is consistent with a ruptured diaphragm, which would require the gas be shut off immediately and the regulator replaced before placing it back into operation. HTH. Quote Link to comment Share on other sites More sharing options...
RK52 Posted October 16, 2017 Report Share Posted October 16, 2017 I know. I know. Resurrecting an old thread, but.... Has anyone's opinion changed on this? Have detectors become more applicable to the job? I'm looking at a couple, but not completely sold on them. Problem being... my nose doesn't pick up on odors well. Quote Link to comment Share on other sites More sharing options...
Jim Katen Posted October 16, 2017 Report Share Posted October 16, 2017 I haven't fired up my gas detector for nearly a decade now. Quote Link to comment Share on other sites More sharing options...
Jerry Simon Posted October 19, 2017 Report Share Posted October 19, 2017 That show pony is also long-dead here. . . Quote Link to comment Share on other sites More sharing options...
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