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Old 11-07-2019, 07:47 PM   #11
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Why don't you get or make a smoke test machine? I get those calls all the time and make money off the test plus the repair.
The one I made is compact, the size of a toolbox. Because I made it out of a toolbox, haha.



Ours is just a shop vac with a metal pan in the bottom on some legs. Been using it for decades.
















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Old 11-07-2019, 07:52 PM   #12
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Seriously I need a crash course in smoke testing. I don't even know if anyone in the city does it.
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Old 11-07-2019, 08:46 PM   #13
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Seriously I need a crash course in smoke testing. I don't even know if anyone in the city does it.



It's really simple. Ever do a water test? Ever do an air test? It's the same thing but with smoke.


You plug all the holes except one where you blow the smoke in. While the smoke blows in someone checks inside for where it leaks out/smells like it's coming from.






















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Old 11-07-2019, 09:07 PM   #14
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Quote:
Originally Posted by Tango View Post
Seriously I need a crash course in smoke testing. I don't even know if anyone in the city does it.



It's really simple. Ever do a water test? Ever do an air test? It's the same thing but with smoke.


You plug all the holes except one where you blow the smoke in. While the smoke blows in someone checks inside for where it leaks out/smells like it's coming from.






















.
I never plug anything. My equipment puts out enough smoke that I don't need to plug the vents. That's probably the problem with using a shop vac, it probably blows too hard and pushes the smoke out of them too fast.
Mine took a bit of fine tuning to get enough flow that it fills the line but not so much that it forces the smoke straight out of the vents.
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Old 11-07-2019, 09:23 PM   #15
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I never plug anything. My equipment puts out enough smoke that I don't need to plug the vents. That's probably the problem with using a shop vac, it probably blows too hard and pushes the smoke out of them too fast.
Mine took a bit of fine tuning to get enough flow that it fills the line but not so much that it forces the smoke straight out of the vents.



We usually blow into the vent and most homes have septic systems so if we didn't plug every thing it would blow through the traps.


Sometimes if we think the leak is big we will blow from one fixture and leave everything else unplugged but for the few times we do a leak test because we can't find it any other way plugging everything and blowing into the vent for a high pressure smoke test really helps find the small leaks. Most of the time when we do a smoke test it's a last ditch effort to prove the smell isn't the drains leaking and that it is prolly just dead animals.












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Old 11-07-2019, 09:26 PM   #16
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We usually blow into the vent and most homes have septic systems so if we didn't plug every thing it would blow through the traps.


Sometimes if we think the leak is big we will blow from one fixture and leave everything else unplugged but for the few times we do a leak test because we can't find it any other way plugging everything and blowing into the vent for a high pressure smoke test really helps find the small leaks. Most of the time when we do a smoke test it's a last ditch effort to prove the smell isn't the drains leaking and that it is prolly just dead animals.












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Looks complicated, I don't have a ladder to go plug the vent on the roof, and you plug all the traps???
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Old 11-07-2019, 09:28 PM   #17
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Quote:
Originally Posted by V.A Hydro-ooter View Post
I never plug anything. My equipment puts out enough smoke that I don't need to plug the vents. That's probably the problem with using a shop vac, it probably blows too hard and pushes the smoke out of them too fast.
Mine took a bit of fine tuning to get enough flow that it fills the line but not so much that it forces the smoke straight out of the vents.
Oh I want to know how you do that! Thanks for the PM replies!
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Old 11-07-2019, 10:58 PM   #18
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Oh I want to know how you do that! Thanks for the PM replies!



Can we just move this to the lounge so we can have a real discussion?


Like I said, often we don't plug everything but we also don't do many smoke tests. Funny enough I do have a customer I went to see earlier this week with a smell who had a broken vent pipe before and it's looking like they have another and we may be doing a smoke test soon.


Even without smoke you can plug everything and blow air in the vent and then listen inside for air leaks. When smoking I have found some that way even before seeing smoke.










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Old 11-07-2019, 11:02 PM   #19
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Looks complicated, I don't have a ladder to go plug the vent on the roof, and you plug all the traps???

It's not hard to plug everything depending on the house. Access to the vent can often be had in the attic instead of going on the roof.


The sinks and tubs can be plugged with the stopper and some putty in the over flow hole. Of course you have to pull the toilet or shove a ton of wet toilet paper in.


But I repeat, this is only to increase the pressure for the smallest of leaks and at this point you may as well do a water test. Most of the time we don't plug everything.

















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Old 11-07-2019, 11:51 PM   #20
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Can we just move this to the lounge so we can have a real discussion?


Like I said, often we don't plug everything but we also don't do many smoke tests. Funny enough I do have a customer I went to see earlier this week with a smell who had a broken vent pipe before and it's looking like they have another and we may be doing a smoke test soon.


Even without smoke you can plug everything and blow air in the vent and then listen inside for air leaks. When smoking I have found some that way even before seeing smoke.










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It was in the lounge and I brought it on the ground floor for V.A Hydro-ooter to reply as he has experience too but his post count is too low. Once it's reached it's course I can put it back to the lounge unless you have a better idea? I'm signing off now.
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