water filling

Hi, the shower drain in my basement (currently cold weather in Canada) has standing water in it and I can't figure out how to drain it. I've tried Drano, boiling water and a snake but nothing seems to work. Anyone have ideas on what might be happening? We had a guest using this shower for 3...

This might be a very newcomer inquiry: We have a double-wide on our property that some family might settle in within the next few months. But I recently turned on the water/switch after the house had been sitting shut-off for a while (we'd turn the power and water on every few months.) This time...