sewer roof vent pipe iced over


Old 12-15-08, 01:28 PM
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sewer roof vent pipe iced over

my roof vent is iced over and not venting. I have a temp. fix by unplugging
a cap access on a feeder line. Its cold here 15 below and might get this way now and then thru the winter. I was thinking of another fix...
getting a different cover for the main sewer tank ,if a non concrete one was available.. and putting a 2 inch vent pipe right over the sewer cover
only to use in these extreme conditions ,to vent some of the sewer gas and take some of the pressure off the system. If I didnt do anything
I do have gas seepage thru drains in the house . most of them are taped tightly shut but I need at least one ready to drain in case of flooding waters due to breaks.
To a sewer pro or someone who has dealt with this.. would this work
,this is a rural area and the smell outside is Not an issue at all.
I cant go up on the roof and try to unplug the ice because its too slick and dangerous. I dont have insurance.
Any creative fixes or info appreciated.
Old 12-15-08, 04:16 PM
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You have warm moist air drifting out of the vent and SUPER cold temps outside, sounds like perfect icing conditions to me. We do not have that problem here, but I would suspect the north dwellers often do. Perhaps heating tape wrapped around the vent or something similar????
Old 12-16-08, 03:15 PM
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Two suggestions...

1) When vent pipes go up through the roof in cold locations, code often requires them to be upsized one size within the heated space (or 2' from the roof). The larger pipe diameter makes it more difficult to actually freeze. (how large is your vent right now?)

2) Can you tell if it's iced over because of snow/rain? Or is it buried by snow on the roof? You may be able to get away with just extending the pipe higher and possibly adding a "U" so it's pointing downward.

Of course, both these solutions rely on you going up on the roof - which is not a good idea if it's snowy and/or icy, but you get the idea.
Old 12-16-08, 04:08 PM
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Well.... If I had a problem and needed to get onto the roof with snow I'd tie a rope to a ladder, throw it over the house then place or pull the ladder onto the roof, tie the rope off and work from the ladder.

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