Easy Size Check

If you are ordering a CQ, remember, if you measure anything with a diameter of 3 inches or less its a SIze A, if its betwen 3 and 4 inches its a size B. So if you measure your vent pipe because the flashing has been chewed off and the diamter is 2 1/4 inches outside, thats a Size A. If the flashing is still intact and you measure 2 7/8 inches, thats also a Size A because its under 3. But if you measure your vent and its 3 3/8 inches outside diameter, or the flashing diameter is 3 3/4 then its a Size B because its between 3 and 4.