Marathon Large Capacity 8in. Vent provides pressure equalization in the roof system and is spun from heavy gauge aluminum with inique cap design that shields against entry of wind-blown rain or snow. It is available in either one-way or two-way options. One-way nitrile rubber valve prevents moisture from re-entering roofing systems while the two-way option lacks a valve which will allow both exhaust and convective movement of air between the breathers.
- Low cost, all-metal breather used for venting all types of insulation
- An extra wide base opening and security attached cap
- An optional foam insert is available to prevent moisture from condensing on the inside of the standpipe
- Flange may be coated with asphalt priming or PVC