Vents that CQ will not work on

There are two types of vents that a CQ will not work on.
The first is if the vent is installed at an angle. Vents should be verticle, but sometimes contractors put them in at angles. A CQ will not work on a vent thats much past vertical because the vent will not line up with the inner tube.
The second is a vent that has had all its flashing chewed off down to the roofline. A CQ does not seal to the vent, so the leak you had before from rain pouring in at the roofline will continue. You need to reflash and install a CQ to keep it from occuring again