AmeriVent 4ECW Double Wall Universal Gas Vent Cap,, 4" Metal Silock & Hose Bibs For posts measuring 3-1/2" x

For posts measuring 3-1/2" x 3-1/2"

Rectangle shape

Top or bottom feed straight-in wiring saves labor and material

Box of 50 pieces

Use with 9" x 9" catch basin series

AmeriVent 4ECW Double Wall Universal Gas Vent Cap,, 4" Metal Silock & Hose Bibs For posts measuring 3-1/2" xHighlights: Size: 4" For use as a ventilation cap as well as type B vent termination AmeriVent caps permit termination of vents at the minimum height necessary above the roof surface Protects against waste gases spilling back into the structure through the appliances draft hood The AmeriVent cap is UL listed, and its patented design of ports and baffles keep rain and debris out of the vent