American Metal Products 4 in. to 5 in. Increaser

This 4 in. to 5 in. Increaser helps you create an HVAC system that suits your needs. Constructed from durable galvanized steel, this increaser is protected by a 1-year manufacturer warranty. Amerivent components are crafted for today's building and appliance requirements.

• Increaser expands vent size from 4 in. to 5 in. diameter
• Type-b-gas vent for category 1-appliances with draft hoods
• Increaser expands vent size up to a maximum of four steps