RectorSeal’s SureSeal Vent-Guard, a plumbing vent stack device, eliminates toxic sewer gas and odor egress and migration to nearby rooftop HVAC system outdoor air intakes. It is available in three sizes designed to fit 2”-, 3”- and 4”-diameter commercial building plumbing vent stacks and restaurant grease interceptor vents. Its design allows airflow in and eliminates insect, animal, inclement weather and bird nesting infiltration. Install requires a quick and easy push-fit into the vent stack opening. EPDM rubber construction withstands temperatures of -50° F to 150°.