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.
Part #
One Way - BV-1205
Two Way - BV-1252P
Packed 10/carton
Overall height | Base opening | Flange diameter | Flange material | Recommended spacing |
9" | 10-1/4" | 14-3/4" | PVC | 1 Per 2,000 SQ. FT. |
"I just completed re-roofing nearly 60,000 SF of 55-year-old roof on the 6th floor of the building here at the Tri-Main Center in Buffalo. I told the roofer at the onsite that I wanted Marathon replacement drains when we first walked the roof. That’s exactly what I got, The “Aluminator” replacement drain! Carmody Roofing went to their supplier, Beacon Building Products to get the dozen or so Marathon replacement drains I needed. I have to say that they add a great finishing touch to the new black EPDM roof. Kudos to the Marathon crew for providing the myriad of roof drain solutions and products for roofing needs everywhere!"
— Harry Chomen, TriMain Development L.P., Buffalo, NY