Single
Glazed: Series 462 sashes
will accept glass from 4mm to 10.38mm thick.
Double Glazing:We have dedicated
sash components that will accept 16mm insulating glass
units. If we fit an inlay adaptor we can get this thickness
up to 20mm.
Patented Ball Valve:The valve fitted into the sill of Series 462 reduces blow-back
under extreme weather conditions. The ball in the valve
carrier floats on water. If water gets into the sump
area the ball will float up and close off the drainage
hole.
Single
glazing 
Double
Glazing
Patented
ball valve 
Anti-blow
back feature