Best Selection of ProTech Systems FasNSeal FSWB5 5" Wall Bracket (300432) FasNSeal® is a Special Gas Vent and Gas Vent Connector, made from AL29-4C® stainless steel and designed for use on natural gas or propane-fired appliances listed as Category II, III and IV or in Canada Type BH Gas Vent Systems having a rated operating temperature of 480 degrees F and maximum positive pressure of 6" water column. FasNSeal® provides horizontal or vertical venting for high efficiency gas boilers,...  ...More Details