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Septic Smell in Kitchen Sink
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Bellefee    Posted 07-28-2003 at 12:42:18       [Reply]  [Send Email]
Hi Everyone,

What a great board! I am thrilled to have stumbled on it. I hope someone here can answer my question:

We recently had a new septic tank installed (July 18). As of two days ago, we have noticed the smell of septic tank odour coming up the kitchen drain (septic tank is just outside the kitchen door) everytime we use the kitchen sink. Septic companies I have called seem reluctant to come out and check it and keep telling me to run water after I have used the sink to fill the p trap with water. The company who installed it think that the suction of the drain when the sink empties is also emptying to p trap, hence the odours coming up the drain. I have also heard that it could be caused by a block in the roof vent. Does any one have any other opinions on what could be causing it/how to solve it??

Thanks in advance for the help!!!

Thanks!    Posted 07-29-2003 at 08:31:40       [Reply]  [No Email]
Thanks for all the help everyone! All the advice is greatly appreciated, since it is fairly embarrasssing when you have guests come and visit and when they walk in to the kitchen they are greeted with a rather unpleasant smell!

I am too cowardly, but I will send the husband up on the roof with the hose and hopefully clear out anything that is blocked in the vent.

Thanks again!

Vanessa in Chelsea, Quebec

DeadCarp    Posted 07-28-2003 at 21:02:17       [Reply]  [No Email]
The way it's supposed to work is pretty straightforward - there SHOULD BE a continuous open line from your roof (past the appliances) all the way to the tank itself. That way when a big sploodge of water goes sailing down the pipe, there's a place for the pipe to burp and breathe and all the pressures to balance without driving you out of the house. ALL appliances (sink, wash machine, tub, shower, even the toilet though that's built-in) need a water trap - a "low spot" that will hold enough water to prevent a smelly leak while the waste pressure is sloshing around, and when the bacteria start multiplying and digesting waste and the septic tank starts brewing properly. If you're smelling something bad and everything's plumbed right, it could only be from the wind blowing the gases across the roof and subsequently wafting in thru an open window. If that's the case, either make the roof vent taller or add a vent to the tank itself. I don't know what the requirement is, not a whole lot, but chimneys are generally 3 feet above the highest point on the roof. I've seen hillside situations where they had to run the vent pipe sideways thru the attic to get to clean air flow.

Les    Posted 07-28-2003 at 18:05:35       [Reply]  [No Email]
I have the same problem every time I sit down in my recliner.

Spence    Posted 07-28-2003 at 15:16:27       [Reply]  [No Email]
Yes and yes.

Another thing, put a vent over the septic tank
as well that'll help.

Your right, check to see if you have a 4in vent
pipe through the roof and put a plumbing wire down it to ensure it's not clogged. A few more vent pipes (1/2in abs) placed at the beginning of the drain locations (sinks,drains,etc) and vented outside will help too.

They tell me there's a vent that comes with a
small ping pong ball contraption that allows air to enter thru suction but prevents gas from escaping. It can be placed in between walls. But can't say for sure. You may want toi check around.

Lazy Al    Posted 07-28-2003 at 14:16:29       [Reply]  [No Email]
I agree with the pluged roof vent . It will also
prevent the stool from flushing good . How does yours work ? The stool might be sucking the water out of the trap . Run water in the sink and then see if it smells then flush the stool
and see if it changes .

Red Dave    Posted 07-28-2003 at 12:50:58       [Reply]  [No Email]
I agree with whoever told you the roof vent may be blocked. If it is it'll cause the vacuum from the drain to the septic tank to suck the water out of your trap, and that would make it smell.
If you can get to it, the easy way to unblock a roof vent is to run water down into it from a garden hose.

williamf    Posted 07-28-2003 at 13:51:21       [Reply]  [No Email]
I'd agree that the blocked up vent is the likely culprit. If it's too far to reach from a spigot to the top of the vent with a hose you could just carry the whole hose up and run it down the vent, use it to "rod out" the plug.

Vic in Kenefick    Posted 07-28-2003 at 13:19:04       [Reply]  [No Email]
You may need to add yeast to your new septic tank and allow a few days for it to catch up.

walt    Posted 07-28-2003 at 14:22:41       [Reply]  [No Email]
Yeast, and any other additives is an "old wives tale". Nothing will increase the growth rate of bacteria.

Vic in Kenefick    Posted 07-28-2003 at 15:42:47       [Reply]  [No Email]
Tell that to the brewers.

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