[canman60]

When ever the dryer is used I get a sewer smell coming in the bathroom exhaust fan

[hkstroud]

Only way that would be possible would be if the bath exhaust fan is not properly vented to the outside.

[canman60]

Only way that would be possible would be if the bath exhaust fan is not properly vented to the outside.

Thanks I think they hooked the bathroom exhaust vent into the vent stack pipe in the attic, will have to crawl up there and check to be sure.

[Milo Dolezal]

If they did hook it up to the vent stack - then it is very wrong. Disconnect it, plug the hole, and reroute it.

Milo

[hkstroud]

Thanks I think they hooked the bathroom exhaust vent into the vent stack pipe in the attic

Who is "they".

[canman60]

Preveious owners of the home

[hkstroud]

Must have been petty dumb.

[Mike45plus]

Can man,
In a tightly constructed home it is possible for the dryer exhaust fan to create negative indoor pressure and draw in outdoor air through vents, fireplaces, exausted appliances / furnaces / water heaters, etc.
If your bathroom vent exits near the soil pipe vent, sewer fumes could be drawn in when the dryer runs - I would first confirm that sewer gas is present by opening the soil pipe clean - out in the basement. There are many ways to generate odors similar to sewer gas including dead, rotting rodents...