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DuraVent - DirectVent Pro 4X6 to 5X8 Increaser

Original price $67.65
Original price $67.65 - Original price $67.65
Original price $67.65
Current price $60.89
$60.89 - $60.89
Current price $60.89
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DuraVent - DirectVent Pro 4X6 to 5X8  Increaser

Introducing the DuraVent DirectVent Pro 4X6 to 5X8 Increaser, the ultimate solution for seamless venting connections in your heating or ventilation system. Engineered with precision and built to last, this increaser allows you to expand your existing venting system effortlessly.

Designed to connect a 4-inch by 6-inch DirectVent Pro pipe to a larger 5-inch by 8-inch pipe, this increaser ensures a secure and efficient transition. Crafted from high-quality materials, it boasts exceptional durability and longevity, making it a reliable choice for both residential and commercial applications.

The DuraVent DirectVent Pro 4X6 to 5X8 Increaser features a sleek and compact design, allowing for easy installation in tight spaces. Its innovative construction guarantees airtight and leak-free connections, minimizing the risk of heat loss and ensuring optimal performance.

Whether you're upgrading your existing HVAC system or starting a new installation project, this increaser provides the flexibility you need. It is compatible with a wide range of DirectVent Pro components, offering versatility and compatibility for seamless integration into your venting system.

With safety as a top priority, the DuraVent DirectVent Pro 4X6 to 5X8 Increaser meets stringent industry standards and regulations. It is UL-listed and tested to withstand high temperatures, ensuring that your venting system operates safely and efficiently.

Typical Installations(Refer this if required):

Refer to our Typical Venting Installation drawings to select the appropriate component parts for your installation.


Planning Your Installation:

1 For vertical gas stove installations, measure the height from the stove outlet to the ceiling to determine the length of black pipe required. Select a ceiling support/wall thimble cover or a cathedral ceiling support box.
2 To determine the length of galvanized pipe required, measure the ceiling thickness and the vertical rise in an attic or second story. Firestops are required at each floor level beyond the first floor ceiling support/wall thimble cover or cathedral ceiling support box. If an offset is required to avoid obstructions, use a pair of 45° elbows. For proper support, use elbow straps with offsets. Use wall straps for long vertical runs. Attic Insulation Shield is required in attic.
3 Measure the roof pitch. Select the proper flashing and storm collar. Determine the minimum height above the roof.
4 For horizontal installations, check the appliance manufacturer’s instructions for minimum rise and maximum horizontal run. A snorkel termination may be used if height restrictions prevent adequate rise above the appliance. Select the appropriate Horizontal Termination Cap (see appliance manufacturer installation instructions). To protect vinyl siding, select vinyl siding standoff. Check appliance manufacturer’s instructions for wall thimble and firestop requirements.

Design Recommendations

  • The following design recommendations are general guideline to assist in the design and selection of venting components for your installation. Always follow DuraVent Installation instructions enclosed with the cap or support box before installing your chimney system. Installation instructions can be viewed online at, under Catalogs and Instructions. Important: Check the manufacturer’s rating plate and instruction manual to confirm that the DuraVent direct vent system is approved for use on the brand name appliance you have selected.
  • The inner and outer pipe diameters should match the outlet size of the appliance.
  • Check the appliance manufacturer’s installation instructions to confirm which types of vent configurations are permitted (i.e. horizontal, vertical, chimney reline, etc.). Also, check for any venting restrictions such as maximum horizontal run, minimum and maximum vertical rise, maximum offset, etc.
  • Be fire safe! Maintain at least the minimum clearances (air-space) between the vent pipe and nearby combustibles, as specified in the appliance manufacturer’s installation instructions. Use proper support and bracing. Follow local building codes and have your venting system inspected.



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