It has a sewage gas-esque odor. I also took a whiff of this odor in the bathroom after a heavy rain storm, but the smell subsided the day after, so it might not be exclusive to the laundry room. All the pipes in the house are connected to a septic tank. I am concerned about the lack of a P-trap in the laundry room set up. Shouldn't there be a P-trap connected to the main drain pipe where the washing machine hose goes inside? Are P-traps always necessary in laundry room set ups? Keep in mind, the water drains outside into the grass. The same person who's responsible for this job also installed the plumbing under my kitchen sink. I think it looks a little suspect( He used a flexible tailpiece rather than a rigid one and the P-trap seems a little too close to the tailpiece). So what do you think?
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