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Posted by Steve Barker LT on June 1, 2006, 10:20 pm
Sounds like the gas trap test. This is copied from the 2000 international
building codes.
P2503.5.2 Finished plumbing. After the plumbing fixtures
have been set and their traps filled with water, their connections
shall be tested and proved gas tight and/or water tight
as follows:
1. Water tightness. Each fixture shall be filled and then
drained. Traps and fixture connections shall be
proven water tight by visual inspection.
2. Gas tightness. When required by the local administrative
authority, a final test for gas tightness of the DWV
system shall be made by the smoke or peppermint test
as follows:
2.1. Smoke test. Introduce a pungent, thick smoke
into the system. When the smoke appears at
vent terminals, such terminals shall be sealed
and a pressure equivalent to a 1-inch water
column (249 Pa) shall be applied and maintained
for the period of inspection.
2.2. Peppermint test. Introduce 2 ounces (59 mL)
of oil of peppermint into the system. Add 10
quarts (9464 mL) of hotwater and seal all vent
terminals. The odor of peppermint shall not be
detected at any trap or other point in the system.
--
Steve Barker
> I'm installing a half-bath (toilet, sink) on my second floor. I'm doing
> the work myself. Right after the rough-in was finished, the city
> inspector came in to inspect. At that point, I had to perform an air
> pressure test on the new lines. It passed.
>
> After I am done with the rest of the project (i.e. with sink and toilet
> in place and hooked up), the inspector will come back to have me
> perform a SECOND test. This second test will also be an air pressure
> test, but will also involve putting a tube down into the trap of the
> toilet.
>
> Anyhow, can anyone fill me in on the details of this test? I'm not
> really confident that I know what I'm supposed to do. For instance, if
> the sink is installed, where do I hook up the pressure gauge (the gauge
> mechanism is also is where I pump the air into the system)? What is
> this tube going into the toilet trap business? What is being tested
> with this test?
>
> Any help would be much appreciated.
>
> Thanks,
>
> Tim F
> Minneapolis, MN
>
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