Water/ice at the bottom of my duraVent cleanout

Diabel

Minister of Fire
Jan 11, 2008
2,880
Ottawa, ON
I ran into this issue mid season last year when i wanted to do a mid season sweep. When i pulled the bottom plate of the cleanout it was full of ice. I had to chip through it in order to sweep. This time, i have been away for two weeks. Last evening i lit the stove and soon after i could see water dripping through the clean out lid. For sure this is rain water. My worry is that if the ice builds up to the thimble water might drip into the stove. Is there any fix to this? Different duravent cap?
 

begreen

Mooderator
Staff member
Nov 18, 2005
85,058
South Puget Sound, WA
Are you in a windy area where it often rains sideways? We have a Duravent cap and haven't had any rain issues in 14 yrs. that it has been installed, but it could be that our chimney is more sheltered.
Selkirk has a SuperVent rain cap that may work better at shielding from sideways rain.

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Diabel

Minister of Fire
Jan 11, 2008
2,880
Ottawa, ON
Yes it is windy often. Sometimes when storms roll in from the lake the rains come on a good angle. The chimney that i have in town (excel) never had water issues but as you say it is sheltered by trees and houses.
 

begreen

Mooderator
Staff member
Nov 18, 2005
85,058
South Puget Sound, WA
The Supervent cap claims to be designed for rain. It looks like it would protect better from wind-driven wet.
 

begreen

Mooderator
Staff member
Nov 18, 2005
85,058
South Puget Sound, WA
Yes, probably the same as we have.
 

SpaceBus

Minister of Fire
Nov 18, 2018
4,768
Downeast Maine
Are you in a windy area where it often rains sideways? We have a Duravent cap and haven't had any rain issues in 14 yrs. that it has been installed, but it could be that our chimney is more sheltered.
Selkirk has a SuperVent rain cap that may work better at shielding from sideways rain.

View attachment 267354
I have one of these and we don't get rain in the chimney. We do get water dripping from the outer ring as the cold wind causes the moisture in the flue gasses to condensate almost immediately. This is my only complaint.
 

Diabel

Minister of Fire
Jan 11, 2008
2,880
Ottawa, ON
It must be then the combination of high wind and rain. I am just worried that if the ice builds up to the top of the clean out then water might start coming into the stove. Sometimes i am not here weeks at a time. I suppose i could remove the clean out lid when i am not here.
 

Diabel

Minister of Fire
Jan 11, 2008
2,880
Ottawa, ON
Maybe drill a small weep hole for drainage? If it won't affect your draft too much
That bottom lid is not air tight. When the stove is running and if there is any ice at the bottom of the cleanout, it will eventually melt. At least now when it is not too cold yet. Anyhow, strange phenomenon. I am sure i am not the only one with this situation.
 

gthomas785

New Member
Feb 8, 2020
58
Central MA
That bottom lid is not air tight. When the stove is running and if there is any ice at the bottom of the cleanout, it will eventually melt. At least now when it is not too cold yet. Anyhow, strange phenomenon. I am sure i am not the only one with this situation.
So it's raining in the chimney and freezing before it can drain out? If it's really that much water getting in I'd look into getting a different cap.