Sewer oder at cast iron house P-Trap

[johnintranets]

Originally Posted by AksarbeN

Wow,,,, well you could pour than a quarter of a cup then. The purpose is to cover the sides of the pipe (even if it’s a larger 4” drain) with something that can kill the bacteria, you’re not looking to fill up the pipe. Hydrogen peroxide is fairly inexpensive for a quart sized bottle. It’s less of a cost than most other products to kill off bacteria odor.

Are there any “other” sources for the odor??? Maybe a mouse or rat that got inside the basement anywhere and died? Or maybe a sewer rat that came up the pipe towards the house and got stuck in the P trap?

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Thanks AksarbeN, I will give that a try tonight and let it sit overnight.

[AksarbeN]

Yet another thought. Try putting some plastic over the drain using tape to seal the possible odor coming from it. If it works and you don’t have any continued odor in the basement then you know for sure it’s that drain area causing the problem. If however there is still a strong odor, then you’ll have to look elsewhere for the cause. Making sure you know the source of the problem is 1/2 of the battle, eliminating it is the other 1/2.