Help with correct furnace exhaust PVC

Posted by theedudenator on November 1, 2009, 8:21 pm

My furnace stopped working, it had some read-outs saying the exhaust
was not working.
Turns out the exhaust pipe was full of water and filled the exhaust
fan with water.
I cleaned all of this out, but now I want to correct the problem.

My exhaust PVC travels from the furnace to the outside wall. There is
a belly in this pipe. Thats were the water was sitting.

Looks like I need to have it angled to drain back to the furnace - I
need to correct the belly.
Is there a standard size for this type of pipe? Mine looks to be 3"
dia. Rather large.

Posted by hr(bob) hofmann@att.net on November 1, 2009, 8:26 pm

> My furnace stopped working, it had some read-outs saying the exhaust
> was not working.
> Turns out the exhaust pipe was full of water and filled the exhaust
> fan with water.
> I cleaned all of this out, but now I want to correct the problem.
> My exhaust PVC travels from the furnace to the outside wall. =A0There is
> a belly in this pipe. =A0Thats were the water was sitting.
> Looks like I need to have it angled to drain back to the furnace - I
> need to correct the belly.
> Is there a standard size for this type of pipe? Mine looks to be 3"
> dia. =A0Rather large.

Can't you drill a very small hole at the low spot of the belly, is it
in a place where yhou could run to a floor drain

Posted by Homebrewdude on November 1, 2009, 8:47 pm

I am trying to fix the problem, not create more.

I don't think drilling holes in an exhaust pipe is a fix..

> Can't you drill a very small hole at the low spot of the belly, is it
> in a place where yhou could run to a floor drain

Posted by Bob F on November 2, 2009, 1:06 am

>> Can't you drill a very small hole at the low spot of the belly, is it
>> in a place where yhou could run to a floor drain

Homebrewdude wrote:

> I am trying to fix the problem, not create more.
> I don't think drilling holes in an exhaust pipe is a fix..

You are sure right about that.

Posted by BQ340 on November 1, 2009, 8:40 pm

theedudenator wrote:

> My furnace stopped working, it had some read-outs saying the exhaust
> was not working.
> Turns out the exhaust pipe was full of water and filled the exhaust
> fan with water.
> I cleaned all of this out, but now I want to correct the problem.
>
> My exhaust PVC travels from the furnace to the outside wall. There is
> a belly in this pipe. Thats were the water was sitting.
>
> Looks like I need to have it angled to drain back to the furnace - I
> need to correct the belly.
> Is there a standard size for this type of pipe? Mine looks to be 3"
> dia. Rather large.

The fan should have a drain port & tube running to the drain, make sure
that is not plugged with goo.

MikeB

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