Drain pit in the garage dry?

[memorex88]

Hello folks,

I have a duplex with a heated double garage. I noticed it is dry. I has an inverted drain which doesn't reach the bottom of the pit.
I think it should be in water to stop drain gasses from coming in the house?

Do you need pictures or do you know what I'm talking about?

Thanks,
Marco

[easy]

the drain in garage should be a sand and oil interceptor with a trap on a horizontal drain to prevent gases from rising but a trap primer or frequent fillings from hose bib should pass.

[majakdragon]

In most areas, a garage drain requires a grease trap. This is true if the garage drain connects to the City sewers. Many people "sneak" a french drain into the garage and the waste/water do not go into the City system. Not always legal.