tmpusr889
Lost in Never Never Land
I recently bought a 1930s fixer-upper and it has have a Drum Trap under the kitchen sink that serves the sink/disposal and the dishwasher. There is no dry vent and the stack connection is about 15 feet away. An inspector told me that drum traps are less prone to siphoning, but I can't find anything to back that up. Is that true? Everywhere I go (work, friends, public restrooms) I've been looking under sinks and haven't seen a drum yet. The only other fixtures in the house are within five feet of the stack, so I'm wondering if the builders just got lazy on this one or it wasn't a concern back then.