Vendor: DIVERSITECH CORP| Vendor # EC-1PVC Flue Caps are an affordable way to protect todays high efficiency furnaces from dirt, moisture and other debris. It protects high efficiency furnaces and reduces draft inducer motor rust. The Universal flue cap fits 1.5, 2 and 3 PVC Pipe. It helps to eliminate pressure switch service calls, is resistant to UV radiation and oxidative degradation and is CSA approved for use in 90% AFUE heating applications.