smelly washing machine

[handsrusinkc]

I just had my washing machine replaced and I now have a sewer gas problem in my laundry room.

I believe that my old washer had something that sealed the space around the hose that goes into the drain in the wall.

My new drain is just a tube sitting in the (much bigger) drain hole in the wall, just next to the hot and cold water hookups.

I wasn't sure if this was supposed to have a trap in the drain, but it doesn't seem as though there is one. I put a coat-hanger in there and it goes the whole length of a straightened out hanger.

Is there supposed to be a trap in this drain? If so, what should I do?
If not, how do I seal this hole?

[FloridaOrange]

From the washing machine box your sanitary line should drop at least 24" to the trap. Check the trap out again, maybe it's just gunked up.

[Cass]

If you do not have a trap you need to have a plumber come and install one or do it your self if you know how. You could try and put 2 cups of bleach down the drain and let it sit over night if it is just a rancid trap(unlikly), but this will not help if there is no trap.