DuraVent FasNSeal W2 Test Port: check the exhaust without drilling the vent
The DuraVent FasNSeal W2 Test Port is a short double wall vent length with a plugged opening for testing exhaust. A technician opens the plug and inserts a probe to measure the exhaust gases and check how the appliance is burning. There is no need to drill into the vent, which DuraVent does not allow on a W2 run. It offers a lower cost alternative to a special appliance adapter with a test opening. FasNSeal W2 is DuraVent’s double wall stainless steel vent for high efficiency gas boilers, furnaces, and water heaters, with an air space between its two walls.
Choose a size from 3 to 16 inch on this page to match your planned vent. The connections use a gasket and a locking band built into the wider end. Each joint takes up 2 inches of length, which matters when planning the run. W2 pipe cannot be cut to fit on site, so an adjustable length handles the remaining gap. Using single wall venting? See the DuraVent FasNSeal Test Port for single wall venting. The DuraVent FasNSeal W2 Test Port ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.








Commercial projects may require custom parts and unique system designs. Duravent offers complete project assistance:








































