Covid-19 is a respiratory illness that spreads when infected individuals shed the novel coronavirus (SARS-CoV-2) that causes it. While this seems to happen chiefly through close contact and respiratory droplets, evidence has mounted that the disease can also spread through airborne transmission. Distancing, masks, and improved ventilation are all critical interventions to interrupt this spread. Many suffering from Covid-19 also shed the virus in their stool. With adequate plumbing, this is an unlikely source of virus transmission — but with the right tools, it can also be an unlikely source…