If the plug is missing there s a direct path for sewer gas to bypass the water trap.
Floor drain gas.
The hydrogen sulfide in sewer gas is what gives it.
Using sureseal waterless floor drain trap seals to eliminate sewer gas and evaporation.
Sewer gas is a byproduct of the breakdown of natural human waste.
Remove the grate that covers the opening and make sure there s a plug inside the drain bowl.
Sewer gas sulphur odor leak discovery cause repairs where a basement or crawl space floor drain or drain trap is the problem.
Sewer gas rising from floor drains might be an unhealthy nuisance for commercial building owners and homeowners but for plumbing service contractors it should be a breath of fresh air for aftermarket and service call add on sales that increase.
Check for a cleanout plug inside the floor drain to get rid of a sewer smell in bathroom or laundry room.
How to diagnose basement or crawl space sewer odors due to a floor drain diagnosing repairing cast iron drain connection leak problems diagnosing sewer gas odors traced to plumbing drain deterioration questions.