- Cast Nickel Bronze Body: Delivers strength, durability, and corrosion resistance as a reliable drainage termination fitting.
- Multiple Connection Types: Available with IPS threaded (standard), no hub, or push-on connections to fit drainage conditions.
- Flange Wall Mounting: Engineered with an anchor flange and countersunk holes for secure flush installation.
- Broad Size Range & Screen Option: Offered in 2″ through 12″ sizes with an optional stainless steel bird screen for debris and pest protection.
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Description
The Marathon MC Vent (BV-10156 for One Way, BV-10157 for Two Way) is a medium-capacity aluminum roof vent designed to provide pressure equalization while shielding against wind-blown rain or snow. Spun from heavy gauge aluminum, it features a security cap and an optional foam insert to minimize condensation. With a wide 12-inch flange and a base opening of 6-1/2″, this vent offers reliable performance in roof ventilation applications.
Key Features:
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One-way (BV-10156) or two-way (BV-10157) models available
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Heavy gauge aluminum construction with security cap
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Wide base opening for effective airflow
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Optional foam insert to help prevent condensation
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12-inch aluminum flange, available with PVC or TPO coatings
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Recommended spacing of one vent per 1,500 square feet
Specifications
- Overall height: 8-1/2″
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Base opening: 6-1/2″
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Base opening with insulation insert: 5-3/8″
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Flange diameter: 12″
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Flange material: Aluminum
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Recommended spacing: 1 per 1,500 sq. ft.
How To
- Select the correct model: BV-10156 for one-way airflow, BV-10157 for two-way airflow.
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Decide on flange coating (PVC or TPO) and whether to include the optional foam insert.
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Cut an opening in the roof deck matching the 6-1/2″ base opening. Clean the area thoroughly.
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Position the vent so the 12″ flange sits flat against the roof surface.
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Secure the vent by fastening through the flange into the roof deck.
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Install the optional foam insert if condensation reduction is required.
FAQs
Q: What is the difference between BV-10156 and BV-10157?
A: BV-10156 is the one-way MC Vent; BV-10157 is the two-way MC Vent.
Q: What material is the vent made from?
A: The MC Vent is spun from heavy gauge aluminum.
Q: What are the vent’s key dimensions?
A: Overall height is 8-1/2″, base opening is 6-1/2″ (5-3/8″ with insert), and flange diameter is 12″.
Q: How many vents are recommended per roof area?
A: One vent per 1,500 square feet is recommended.
Q: Is there a way to reduce condensation?
A: Yes, an optional foam insert can be added to help prevent condensation.
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