"Sewer gas never killed anybody" used to be the prevailing wisdom when discussing failed trap seals. As we now have discovered the role of dry traps in spreading infectious diseases, a reliable trap seal becomes critical. ProSet Systems' Trap Guard inhibits the evaporation of trap seals and provides a non-mechanical physical barrier to sewer gas, raw sewage, viruses, bacteria, insects and vermin. Trap Guard installs in minutes and can be purchased as a complete drain or as a retrofit for existing pipes or in other make drains.ProSet Systems.