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Posted by HomeInSeattle on October 3, 2008, 12:58 pm
I have a Payne Plus 90 high-efficiency furnace. It has two PCV pipes
coming out the side that go up through the roof. The exhaust pipe looks
normal on the outside but inside it has two chambers: the larger on top
for exhaust air and much smaller on the bottom to handle the condensate
(water) that drips back down the vertical pipe.
I need to replace that short section of pipe connecting directly into the
furnace. Is it Ok to use regular PVC or is the dual-chamber pipe that was
installed when new 14-years ago still the way to go to have it function
right.
Thanks,
Dan
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Posted by on October 3, 2008, 1:14 pm
On Fri, 03 Oct 2008 16:58:10 GMT,
mailbox.451_at_comcast_dot_net@foo.com (HomeInSeattle) wrote:
>I have a Payne Plus 90 high-efficiency furnace. It has two PCV pipes
>coming out the side that go up through the roof. The exhaust pipe looks
>normal on the outside but inside it has two chambers: the larger on top
>for exhaust air and much smaller on the bottom to handle the condensate
>(water) that drips back down the vertical pipe.
>I need to replace that short section of pipe connecting directly into the
>furnace. Is it Ok to use regular PVC or is the dual-chamber pipe that was
>installed when new 14-years ago still the way to go to have it function
>right.
>Thanks,
>Dan
No, you can pretty much just re-design it on the fly using
whatever Lowes happens to have on the shelves that day, it don't
matter.
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Posted by Noon-Air on October 3, 2008, 2:47 pm
>I have a Payne Plus 90 high-efficiency furnace. It has two PCV pipes
> coming out the side that go up through the roof. The exhaust pipe looks
> normal on the outside but inside it has two chambers: the larger on top
> for exhaust air and much smaller on the bottom to handle the condensate
> (water) that drips back down the vertical pipe.
> I need to replace that short section of pipe connecting directly into the
> furnace. Is it Ok to use regular PVC or is the dual-chamber pipe that was
> installed when new 14-years ago still the way to go to have it function
> right.
> Thanks,
> Dan
What did you local, competent, licensed, insured, professionally trained,
HVAC technician tell you??
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Posted by HomeInSeattle on October 3, 2008, 4:16 pm
HomeInSeattle had written this in response to
http://www.thestuccocompany.com/hvac/Re-Dual-Chamber-PVC-Necessary-34825-.htm
:
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> What did you local, competent, licensed, insured, professionally
> trained HVAC technician tell you???
For $125 (or $135), they are more than willing to come out and look at
it...
It's a really tough call: the technicians in the field see the results of
the best and worst engineering and can often make things better than the
original design. They can also make it worse.
On the other hand, the engineer who specified the dual-chamber pipe had to
convince the company bean counters that the additional 70-cent cost per
$950 furnace would not bankrupt the company, that it really was needed for
best performance. Sometimes, however, engineers overengineer.
In this instance, does it cure a problem not likely to happen, or is the
technician oblivious to any problem that doesn't instantly appear before
their eyes?
By the way, the need to replace this pipe is based on the local,
competent, licensed, insured, professionally trained HVAC technician
half-gluing up 5 chunks of PVC and unions instead of one continuoou
section and water pouring out of several of the joints and flooding the
garage floor. It has reach the point of divorce court if I do not do
something about all the leaks.
Thanks,
Dan
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Posted by Noon-Air on October 3, 2008, 5:32 pm
> HomeInSeattle had written this in response to
> http://www.thestuccocompany.com/hvac/Re-Dual-Chamber-PVC-Necessary-34825-.htm
> :
> -------------------------------------
>> What did you local, competent, licensed, insured, professionally
>> trained HVAC technician tell you???
> For $125 (or $135), they are more than willing to come out and look at
> it...
> It's a really tough call: the technicians in the field see the results of
> the best and worst engineering and can often make things better than the
> original design. They can also make it worse.
> On the other hand, the engineer who specified the dual-chamber pipe had to
> convince the company bean counters that the additional 70-cent cost per
> $950 furnace would not bankrupt the company, that it really was needed for
> best performance. Sometimes, however, engineers overengineer.
> In this instance, does it cure a problem not likely to happen, or is the
> technician oblivious to any problem that doesn't instantly appear before
> their eyes?
> By the way, the need to replace this pipe is based on the local,
> competent, licensed, insured, professionally trained HVAC technician
> half-gluing up 5 chunks of PVC and unions instead of one continuoou
> section and water pouring out of several of the joints and flooding the
> garage floor. It has reach the point of divorce court if I do not do
> something about all the leaks.
> Thanks,
> Dan
Then the installation wasn't done correctly, and the installer needs to
correct the problem. It should have been caught by the mechanical inspector
that checked the furnace and installation in the first place.
OTOH, if it was installed by the lowest bidder, then all bets are off....
you didn't get what you didn't pay for.
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>coming out the side that go up through the roof. The exhaust pipe looks
>normal on the outside but inside it has two chambers: the larger on top
>for exhaust air and much smaller on the bottom to handle the condensate
>(water) that drips back down the vertical pipe.
>I need to replace that short section of pipe connecting directly into the
>furnace. Is it Ok to use regular PVC or is the dual-chamber pipe that was
>installed when new 14-years ago still the way to go to have it function
>right.
>Thanks,
>Dan