[img_assist|nid=22|title=baking soda|desc=|link=none|align=right|width=75|height=100]Slow pipes? You don't have to go to the hardware store and pay $6-12 on a bottle of chemicals every month just to make sure that your drains are flowing OK.
Once a month do this:
It'll foam up a bit, like back in elementary school with the model volcano. Rinse the drain with hot water within an hour.
Do this once a month and it works just like the chemicals do on regular household drains, but definitely won't harm them.
It costs about $2.50 for a gallon of vinegar, and 50-99 cents for a box of baking soda.
Less than a dollar per month with identical results. That's a secret worth sharing.