Premium Large Capacity heat weldable PVC Roof Vent for pressure/moisture relief of roof systems. Available in one way or two way that meets 1-150 or 1 - 300 National Venting Code in combination with inlet vents.
Pre-Vent design provides venting capacity to accommodate 327 sq feet of floor. The Pre-Vent is UV Stabilized to help reduce any deterioration and fading from the sun.
To install the Pre-Vent properly it has been designed with pre- drilled holes in the flange to attach the Pre-Vent to the deck. The Pre-Vent when used with mechanical venting should be insulated accordingly to assist in directing the release of internal condensation. The base of the penetration within the Pre-Vent should be sealed to maintain the integrity of the roofing system. See your membrane manufacturers for details.
Venting capacity will be maintained through pipe sizes up to 80% of the diameter of the Pre-Vent.
Caps must be adhered to base with PVC glue.
Features
- Super heavy duty PVC plastic for long life
- Exclusive one-way valve design to prevent moisture from re-entering the roof system
- Special insect resistant wire screen
- Vandal proof
- Pre-drilled flange for fastening to roof deck
Options
- Available in one-way or two-way
Information
Part #
One Way - BV-1205
Two Way - BV-1252P
Packed 10/carton
Specifications
| Overall height | Base opening | Flange diameter | Flange material | Recommended spacing |
| 9" | 10-1/4" | 14-3/4" | PVC | 1 Per 2,000 SQ. FT. |
Reflecting on 2014 causes me to send you a quick note to compliment you and all the personnel at Marathon Products for doing such a great job. So many times we needed a product quickly to satisfy our customers’ needs and so many times you responded with the necessary product and service to keep everybody’s wheels turning. You always have the inventory to service our orders.
There are 3 things that I appreciate most about Marathon Roofing Products, your inventory, your willingness to develop and introduce new products and especially the people there that “make it happen”. I look forward to an ongoing relationship with the Cislo family and Marathon Roofing Products.
— Dan Crookston, CC Supply, Barberton, OH