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Posted by on June 1, 2006, 1:10 pm
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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Posted by marson on June 1, 2006, 9:58 pm
TimFisher2@gmail.com wrote:
> 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
you use a manometer (google "manometer plumbing inspection") a tube
connected to a manometer in inserted through the water in the trap of
the toilet. you blow on it to obtain a one inch difference in the
levels (i think, i'm not a plumber so someone might correct me), and it
should hold that difference. you need water in all your traps and your
vents must be blocked.
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Posted by on June 1, 2006, 11:09 pm
marson wrote:
> you use a manometer (google "manometer plumbing inspection") a tube
> connected to a manometer in inserted through the water in the trap of
> the toilet. you blow on it to obtain a one inch difference in the
> levels (i think, i'm not a plumber so someone might correct me), and it
> should hold that difference. you need water in all your traps and your
> vents must be blocked.
Thanks Marson, and Steve (below) for your help. A challenge for me is
that I don't have a manometer, and I really don't want to have to buy
one. The deal is, I (not the inspector) have to perform this test with
the inspector standing there watching me. I'm not sure I have a firm
grasp of enough of the details to do that.
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Posted by MLD on June 2, 2006, 9:53 am
> marson wrote:
>
> > you use a manometer (google "manometer plumbing inspection") a tube
> > connected to a manometer in inserted through the water in the trap of
> > the toilet. you blow on it to obtain a one inch difference in the
> > levels (i think, i'm not a plumber so someone might correct me), and it
> > should hold that difference. you need water in all your traps and your
> > vents must be blocked.
>
> Thanks Marson, and Steve (below) for your help. A challenge for me is
> that I don't have a manometer, and I really don't want to have to buy
> one. The deal is, I (not the inspector) have to perform this test with
> the inspector standing there watching me. I'm not sure I have a firm
> grasp of enough of the details to do that.
>
A manometer is nothing more that a *U* shaped tube with liquid in the loop
and up the sides (any height should be OK). Why not get some clear tubing,
make a loop and put water in it. Fasten the loop to some plywood, make it a
foot or two long vertically. For the rest, one leg should be long enough to
insert into your toilet and the other leg whatever is needed for you to blow
into it without difficulty. Put some lined or marked paper behind the loop
and make some sort of scale so that you can measure the height difference
between the columns. Throw some food coloring in the water to make it easier
on the eyes. Of course, the height difference is a function of the liquid
that is used in the manometer. Many manometers use Mercury, because of it's
density, to keep the height difference to a manageable level. A column of
water 34 Ft. high is = to 14.7 psi. So, using water, a 1 in. height
difference is only 0.036 psi. (Another way to get the answer---Pressure=
height* fluid density).
Good luck
MLD
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Posted by Goedjn on June 2, 2006, 11:01 am
On 1 Jun 2006 20:09:32 -0700, Christine.Hurney@gmail.com wrote:
>marson wrote:
>
>> you use a manometer (google "manometer plumbing inspection") a tube
>> connected to a manometer in inserted through the water in the trap of
>> the toilet. you blow on it to obtain a one inch difference in the
>> levels (i think, i'm not a plumber so someone might correct me), and it
>> should hold that difference. you need water in all your traps and your
>> vents must be blocked.
>
>Thanks Marson, and Steve (below) for your help. A challenge for me is
>that I don't have a manometer, and I really don't want to have to buy
>one. The deal is, I (not the inspector) have to perform this test with
>the inspector standing there watching me. I'm not sure I have a firm
>grasp of enough of the details to do that.
I dunno why you need a meter. YOu block the vents
and the main drain, mark the water level in the toilet,
and blow air into the system until the water in the
bowl rises an inch. Then come back in however long
it's supposed hold the pressure and see if the water level
has gone down.
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