Beckson has pie plates with a vent
see
http://www.beckson.com/dplphp.html
Add extra ventilation with this adaptable deck plate. Cowl vent may be removed and standard smooth center plate installed to keep deck clear and watertight. Each unit includes both vent center and standard smooth center.
Only Available in white. Standard smooth center can be either solid white or clear. Available in both pry-out and screw-out models.
Cowl Top Deck Plate
Outside Diameter: 8-1/8" (20.6 cm) Passage: 6-3/16" (15.5 CM) Hole Cut: 6-1/2" (15.5 CM)
See this product in action
Pry-Out
Model # Height Center
DP-LP-6 1-3/4" (4.5 CM) White
DP-LPC-6 1-3/4" (4.5 CM) Clear
DP-HP-6 3" (7.62 CM) White
DP-HPC-6 3" (7.62 CM) Clear
Screw-Out
Model # Height Center
DP-LP-6S 1-3/4" (4.5 CM) White
DP-LPC-6S 1-3/4" (4.5 CM) Clear
DP-HP-6S 3" (7.62 CM) White
DP-HPC-6S 3" (7.62 CM) Clear
see
http://www.beckson.com/dplphp.html
Add extra ventilation with this adaptable deck plate. Cowl vent may be removed and standard smooth center plate installed to keep deck clear and watertight. Each unit includes both vent center and standard smooth center.
Only Available in white. Standard smooth center can be either solid white or clear. Available in both pry-out and screw-out models.
Cowl Top Deck Plate
Outside Diameter: 8-1/8" (20.6 cm) Passage: 6-3/16" (15.5 CM) Hole Cut: 6-1/2" (15.5 CM)
See this product in action
Pry-Out
Model # Height Center
DP-LP-6 1-3/4" (4.5 CM) White
DP-LPC-6 1-3/4" (4.5 CM) Clear
DP-HP-6 3" (7.62 CM) White
DP-HPC-6 3" (7.62 CM) Clear
Screw-Out
Model # Height Center
DP-LP-6S 1-3/4" (4.5 CM) White
DP-LPC-6S 1-3/4" (4.5 CM) Clear
DP-HP-6S 3" (7.62 CM) White
DP-HPC-6S 3" (7.62 CM) Clear