The brass drains will probably be ok. One thing to ALWAYS keep in mind with drains is - you should ALWAYS install drain system that will virtually never compact with sediment. And if does fill with sediment - it should be EASY to clean. See, people don't even change their furnace filters, so they're certainly not going to mess with cleaning their drains.
The picture is of poor quality, but here is a link to a picture of the Duraslope.
It's the LAST picture. Like I said - poor quality.